20 Best Tankless Water Heater in Market Today

How We Decided

63 products considered. 1,400+ reviews analyzed, 48 research hours spent, 30+ info. sources referred

More about our Methodology

Hot water is a major requirement for every household.

This makes the water heater an essential appliance.

Making sure that all the faucets and plumbing outlets in a house get hot water round the clock and that the temperature is not compromised requires selecting an extremely good and well-suited model of the water heater.

There is a ton of choices available to the customers when they step out and try to figure out a model that will best suit their needs. So then how can we expect, as a novice, to make the correct choice?

This is after all a big investment and requires careful thought as a considerable amount of money is involved. Also, a water heater is a product with an average life of over two decades.

This makes it even more important to ensure the right choice is made as the product will stay with the household for a considerable amount of time.

When it comes down to choosing between a tankless and a tanked water heater, tankless water heaters are fast gaining popularity amongst the masses given their long list of advantages.

The following sections of the article aim to cater to all sorts of questions that one might have regarding the purchase of a tankless water heater.

Comparison Table: Best Tankless Water Heater

Here is a quick comparison table for the best tankless water in the market to help you select quickly – 

ProductCategoryUsageFlow Rate (GPM)Price

EcoSmart ECO 27

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White

Best Electric Heater

Electric Home 3 Check Price

Takagi T-KJr2-IN-LP

Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

Best Gas Heater

Propane Home 6.6 Check Price

Rinnai RL94EP

Rinnai RL Series HE+ Tankless Hot Water Heater | RL94eP - Propane | Outdoor Installation

Best for Whole House

Propane Whole House 9.4 Check Price

Eccotemp L10

Eccotemp L10 2.6 GPM Portable Tankless Water Heater, 1 Pack, White

Best for RVs

Propane RV 2.6 Check Price

Eccotemp L5

Eccotemp L5 Portable Outdoor Tankless Water Heater

Best for Outdoors

Electric Outdoor 1.5 Check Price

Ecosmart ECO 36

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

Electric Home 6 Check Price

Rheem RTE 13

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

Electric Home 4 Check Price

Stiebel Eltron Tempra Plus

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control

Electric Home 0.7 Check Price

Eccotemp FVI12-LP

Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White

Propane Home 3.6 Check Price

Camplux

Camplux 10L Outdoor 2.64 GPM Digital Display Portable Propane Gas Tankless Water Heater

Propane Home 2.64 Check Price

Eccotemp fvi12-NG FVI-12

Eccotemp fvi12-NG FVI-12 Natural Gas, 3.5 GPM, High Capacity Tankless Water Heater, White

Natural Gas Home 4 Check Price

Bosch Electric Tankless Water Heater

Bosch Thermotechnology - WH27 Tronic 6000 C Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Installation 26.9 kW

Electric Whole House 3.5 Check Price

Takagi T-H3-DV-N

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

Natural Gas Whole House 10 Check Price

Rheem 240V Heating Chamber RTEX-13

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

Electric Whole House 1.5 Check Price

Girard 2GWHAM

Electric RV Not Listed Check Price

EZ 101 Tankless Water Heater

EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE

Battery RV 1.6 Check Price

Excel TANKLESS LPG GAS WATER HEATER

Excel Pro Tankless Gas Water Heater NATURAL GAS 6.6 GPM Whole House and for Hydronic heating Compare to Rinnai, Rheem,Noritz, Bosch FREE FLUE KIT

Natural Gas RV 1.6 Check Price

CAMPLUX ENJOY OUTDOOR LIFE

Camplux 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater

Propane Outdoor 1.58 Check Price

AO Smith ATI-540H-N

AO Smith ATI-540H-N Condensing Residential/Light Commercial Tankless Heater

Natural Gas Commercial 9 Check Price

Noritz NC380-SV-ASME

Noritz NC380-SV-ASME NG ASME Indoor/Outdoor Tankless Natural Gas Water Heater, 13.2 GPM

Natural Gas Commercial 13.2 Check Price
 

Article Outline

There is a section that compares the costs of having a tankless and a tanked (on demand) water heater.

After sufficient analysis establishing a tankless water heater as a better choice, there are sections that describe the different types of water heaters and the pros and cons associated with each type.

Concluding this article is a review of the top twenty products in each category which will greatly help a reader in getting real-time insights about the performance of the water heater.

Reviews of Top Tankless Water Heaters

1.best overall rating

EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White

EcoSmart is one of the businesses whose main product line is focused on designing and manufacturing environment-friendly tankless water heaters.

They also develop a few other products which are various models of tankless water heaters like shower heaters, pool & spa heaters, heater boosters, condensing models, mini models, point of use models and much more.

The focus is on bringing green products at an economical price to the customers.

This heating unit boasts of 50% savings on water heating costs. The digital temperature control feature offers a lot of precision allowing as small as one-degree increments in the temperature.

The activation flow for the unit is 0.3 GPM, which is one of the lowest in the industry.

The inner components of this heater are made of copper and stainless steel for durability, efficiency and higher ease of replacement.

The compact size of the unit allows for it to be fitted into compact spaces and the stylish design adds great aesthetic appeal to the unit. It is said to save up to 12 cubic feet of storage space.

The ‘27’ in the name of the water heater model signifies the electrical specifications of the unit which is 27 kW.

This EcoSmart tankless water heater is one of the most popular products in the ’Electric Tankless Water Heater’ category. It weighs a meager 11 lbs and the dimensions of the same are 3.6 x 17 x 17 inches.

Key USPs

  • Self-modulating technology adjusts energy input based on hot water required
  • Offers a limited lifetime warranty
  • Up to 50% savings in energy costs
  • Output hot water flow rate of 3 GPM
  • Capable of 92,000 BTUs per hour
PROS:
  • Very lightweight
  • Rated high by customers for the temperature control feature
  • Energy efficiency is good
  • Highly recommended by the happy customers
  • Performs as expected
  • Supports a remote thermostat
  • Provides hot water consistently
CONS:
  • Warranty terms could be better

Check Reviews & Price on Amazon

2.best overall rating

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater

This tankless water heating unit by EcoSmart boasts of a self-modulating technology which means that the unit regulates the energy input to the device based on the hot water requirement and the temperature of the incoming water so as not to waste any excess energy on heating the water unnecessarily.

There is a great degree of control in terms of temperature regulation as the user can modify the temperature in increments as low as one degree Fahrenheit.

The energy-saving performance of this unit is remarkable as it allows one to save almost 50% on heating costs. The ‘36′ in the name of the product is indicative of the power output of the unit which corresponds to 36 kW.

The design of the unit is a space saver, being almost 90% smaller. The low activation flow rate of 0.3 GPM ensures that the user does not get cold water.

The on-demand, instant supply of hot water by the unit is guaranteed with the help of the copper and stainless components.

The flow rate of hot water from this device is almost 6 GPM making it suitable for serving multiple faucets comfortably.

Even at temperatures as low as 35, the heater is capable of giving a 3.5 GPM output. The unit weighs a meager 18.35 lbs and the dimensions of the same are 17 x 19 x 3.8 inches.

This EcoSmart tankless water heater is one of the most popular products in the ’Electric Tankless Water Heater’ category.

Key USPs

  • Good energy savings of almost 50%
  • Lightweight, compact design
  • Self-modulating, energy-efficient technology
  • Great precision on the temperature control
PROS:
  • Energy-saving model
  • Good temperature control
  • Consistent performance
  • Great aesthetic appeal
  • Offers a good limited lifetime warranty
  • Offers a good range of temperature settings
  • Good power output (~92,000 BTUs per hour)
CONS:
  • Technical support feature could be better

Check Reviews & Price on Amazon

3.best overall rating

Rheem RTE 13 Electric Tankless Water Heater

Rheem RTE 13 Electric Tankless Water Heater, 4 GPM

The Rheem Manufacturing Company is one of the most well-recognized names in the tankless water heater industry owing to its roots that go way back in 1925.

The company was jointly founded by Donald Rheem, Richard Rheem, and Edwin Ruud.

The multiple product lines of this company include equipment for ventilation, air conditioning, and heating, apart from manufacturing tankless water heaters. Currently, the company is headquartered at Atlanta, Georgia, United States.

This Rheem product offers a hot water output rate of 4 GPM and the ‘13′ in the name of the product is indicative of its power rating pegged at 13 kW.

The water heater features a temperature controller on its front face and also features an LED indicator for showing whether the device is in the active mode or the standby mode.

The innards of the water heater are made of a rugged brass and copper heat exchanger.

The modulating technology of this unit ensures that only that much energy is consumed as is needed for heating the water at a certain temperature and flow rate.

The unit weighs a meager 7.35 lbs and the dimensions of the same are 7.2 x 7.2 x 7.2 inches making it one of the smallest water heaters in a segment of similar capacities.

This tankless water heater by Rheem is one of the most popular products in the ’Electric Tankless Water Heater’ category.

Key USPs

  • Energy-star certified model
  • Heat exchanger and parts warranty of 10 years and 1 year respectively
  • Activation flow rate as low as 0.4 GPM
PROS:
  • Very compact and portable design
  • A good temperature control feature
  • Ease of installation is high
  • Good energy savings
  • Long-lasting product life
  • Durable and sturdy design
CONS:
  • Warranty conditions could be better
  • Technical support could be better

Check Reviews & Price on Amazon

4.best overall rating

Stiebel Eltron Tempra Plus 29 kW, Tankless electric water heater

Stiebel Eltron Tempra Plus 29 kW, tankless electric water heater with Self-Modulating Power Technology & Advanced Flow Control

A German company, Stiebel Eltron is headquartered at Holzminden, Germany and was founded by Dr. Theodor Stiebel. The roots of this company can be traced way back to 1924 in Berlin.

The company sells a variety of products like heat pumps, ventilation equipment, system cylinders, hand dryers, central heating equipment and much more.

This diversified line of products is developed with a great focus on achieving the highest technical level.

This heating unit by Stiebel Eltron is a part of the Tempra Plus series. The power rating of the device is 29 kW and it is one of the products with proven reliability. It does not require any venting.

The design is very sleek which allows for easy installation within the house without much hassle. The unit also promises about 15% to 20% savings on the electricity bills.

The unit weighs around 10 lbs and the dimensions of the same are 16.5 x 4.6 x 14.5 inches.

This tankless water heating unit by Stiebel Eltron is one of the most popular products in the ’Electric Tankless Water Heater’ category.

Key USPs

  • Features an economy monitor which shows cost savings
  • Fitted with a large, backlit multifunction display
  • Two temperature memory keys
  • High quality, German manufacturing
  • Advanced flow control for maximum energy savings
  • Water temperature range of 86 to 125
  • Working water pressure of 150 PSI
PROS:
  • Good aesthetic appeal
  • Quick and easy installation
  • Good precision on temperature control
  • Good energy efficiency
  • Reputed brand name
  • Great technical support
  • Highly recommended by users
  • Offers a 7-year leakage and a 3 years parts warranty
CONS:
  • Product life could be longer

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5.best overall rating

Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters

Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White

Eccotemp started as a family-owned and operated business in 2004 with a focus on developing eco-friendly tankless water heaters.

They have been greatly successful in creating these products and become an established brand name in the water heating space. The company’s roots can be traced back to Charleston, South Carolina, United States.

The different variations in their product lines can be summarized as whole home, electric and portable tankless water heaters.

This energy saver unit by Eccotemp is rated at 3.6 GPM and runs on propane. It activates only when in use thereby saving a lot of energy.

The device detects a flow of water and turns on automatically. The flow rate of this small trickle of water can be as low as 0.65 GPM.

It is perfect for indoor installation and with safe ventilation can serve a small cabin or apartment effectively. The compact design saves a lot of space.

The temperature display is easy to comprehend and is fitted on the front panel of the water heater. The heater operates with minimal noise output. The unit features a safe electronic ignition system.

The power rating of the unit is 80,000 BTUs per hour. The weight of this water heater is 33 lbs and the dimensions of the same are 29 x 17 x 11 inches.

This Eccotemp tankless water heater is one of the most popular products in the ‘Tankless Gas Water Heater’ category.

Key USPs

  • Achievable temperature range of 80 to 140
  • Manual temperature controls
  • Perfect for the whole home, indoor usage
  • Kit includes a lot of accessories for installation
  • Can operate with a maximum water pressure of 80 PSI
  • Offers a 2 year limited lifetime warranty
PROS:
  • Easy to install
  • Plenty of hot water available on demand
  • Good brand reputation
  • Great value for money
CONS:
  • Technical support function could be much better
  • Not suitable for cold climates

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6.best overall rating

Camplux 10L Outdoor 2.64 GPM Digital Display Portable Propane Gas Tankless Water Heater

Camplux 10L Outdoor 2.64 GPM Digital Display Portable Propane Gas Tankless Water Heater

Camplux is an appliance manufacturing brand that is exclusively focused on the development of outdoor equipment.

These product lines include portable, residential & refurbished tankless water heaters, portable gas stoves, and gas grills, and mini electric tankless water heaters.

They also sell accessories for all the products that they sell.

This portable tankless water heater by Camplux runs on propane and offers a hot water flow rate of 2.64 GPM. The unit offers an eco mode for greater energy savings and different modes can be chosen according to the climate.

Some of the safety features of this device include flame failure, anti-freeze protection and overheating protection amongst others.

The unit is extremely compact and lightweight making it perfect for camping and outdoor activities. The maximum power output for the device is 68,000 BTUs per hour.

The manufacturer also offers an 11.5% energy savings guarantee on this unit. The weight of this unit is around 18 lbs and the dimensions of the same are 21.6 x 12.9 x 8.3 inches.

This tankless water heater by Camplux is one of the most popular products in the ‘Tankless Gas Water Heater’ category.

Key USPs

  • Can operate with a water pressure range of 3.6 PSI to 110.0 PSI
  • High thermal efficiency at 88.5%
  • Compact design suitable for outdoor usage
  • Up to 50% savings on energy costs
PROS:
  • Ease of installation is high
  • Great comfort of use
  • Pocket-friendly purchase
  • Great for camping and off-grid applications
  • Good range of temperature
  • Great quality equipment
CONS:
  • Customers were unhappy with the technical support

Check Reviews & Price on Amazon

7.best overall rating

Eccotemp fvi12-NG FVI-12 Natural Gas, 3.5 GPM, High Capacity Tankless Water Heater

Eccotemp fvi12-NG FVI-12 Natural Gas, 3.5 GPM, High Capacity Tankless Water Heater, White

This Eccotemp unit runs on natural gas and is pegged to give a hot water output at 3.5 GPM. It is well suited for a whole house, indoor installation, and usage.

The self-modulation technology ensures that the unit is activated only when a flow of water is detected. The unit is extremely easy to operate and has an easy to read digital temperature display.

The design of this unit, as is common with all models of Eccotemp, is compact and space-saving. There is minimal noise output with the operations of this water heater making it suitable for indoor installation.

The safe electronic ignition system is great for powering on the unit easily. This is a manual water heater which weighs 29 lbs and the dimensions of this device are 4 x 15 x 24 inches.

This Eccotemp tankless water heater is one of the most popular products in the ‘Tankless Gas Water Heater’ category.

Key USPs

  • Offers a limited lifetime manufacturer warranty of 2 years
  • Kit includes a variety of accessories
  • Gas-fired, energy-efficient unit
PROS:
  • Easy to install
  • Good temperature control
  • Great, high-end features
  • Good value for money
  • Works well
CONS:
  • Adjusting the water temperature knob is a little tricky

Check Reviews & Price on Amazon

8.best overall rating

Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

Takagi is a popular brand of tankless water heaters and has been in this business for almost 70 years. Their products are sold exclusively through a network of contractors and plumbing wholesalers.

Founded in 1952, Takagi was one of the first businesses to specialize in tankless products in North America. They were also the first company to offer the ‘direct vent’ models in the gas versions.

Takagi can be considered a pioneer in changing the type of tankless water heater models available in the United States.

This Takagi unit is a tankless water heater made for indoor installation. It has a direct vent type of ventilation and is guaranteed to be an ultra-low NOx version.

The minimum and maximum power output for this water heater is 19,500 BTUs per hour and 140,000 BTUs per hour respectively. It features a copper heat exchanger for maximum efficiency in heating water.

With a 6.6 GPM output flow rate, this unit is one of the most popular indoor tankless water heater products by Takagi. The unit requires 4-Inch category III stainless steel venting.

The safety features of this water heating unit include freeze protection, protection against overheating and surge protection.

The product weighs 38 lbs and the dimensions of the same are 6.7 x 13.8 x 20.3 inches.

This tankless water heater by Takagi is one of the most popular products in the ‘Tankless Gas Water Heater’ category.

Key USPs

  • A high output flow rate of 6.6 GPM
  • The smallest model in the Takagi lineup
  • Perfect for light residential and radiant heating applications
  • Uniform energy factor of 0.80
  • Has specific diagnostic codes for easier troubleshooting
PROS:
  • Easy to install
  • Works as expected
  • Extremely compact
  • Good quality components and great build
  • Gives hot water instantly
CONS:
  • Customers not happy with the manufacturer’s warranty

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9.best overall rating

Bosch Electric Tankless Water Heater

Bosch Thermotechnology - WH27 Tronic 6000 C Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Installation 26.9 kW

Founded in 1995, Bosch Thermotechnology is a subsidiary of the much bigger Bosch name and was exclusively developed for the creation of eco-friendly, energy efficiency, hot water, and heating solutions.

It is headquartered at Wetzlar, Germany. Their entire range of products can be classified into a part of undoubtedly one of the oldest companies to exist (over 280 years old) and their experience translates into their quality products.

The electric rating of this Bosch water heater is 26.9 kW and it is a perfect unit for meeting the hot water requirements of the entire household.

The convenient small size of the water heater allows for it to be installed easily in even the tightest corners for commercial and residential applications.

The polymer encased heating elements of this unit ensures that the device provides hot water at consistent temperatures. This is also ensured by the in-built flow sensors.

The external temperature control knob offers superior temperature stability and control. The thermal efficiency of the device is pegged at 97% with minimal stand-by loss.

The water heater can easily provide hot water to one to three hot water appliances.

This Bosch tankless water heater is one of the most popular products in the ‘Whole House Tankless Water Heater’ category. The unit weighs around 20 lbs and the dimensions of the same are 15.5 x 4.5 x 12.5 inches.

Key USPs

  • Offers a 10-year warranty on the heating module and a 1-year warranty on the parts
  • Part of the compact and highly efficient ‘Tronic’ series
  • High-quality manufacturing guaranteeing a long product life
  • Element modulation for control over a consistent output temperature
PROS:
  • Good brand reputation
  • Great value for money
  • Small, compact design
  • Great aesthetic appeal
CONS:
  • Customers expected a longer product life

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10.best overall rating

Rinnai RL94EP Tankless Water Heater, Large, RL94eP-Propane/9.4 GPM

Rinnai RL Series HE+ Tankless Hot Water Heater | RL94eP - Propane | Outdoor Installation

Rinnai Corporation is a Japan-based business founded way back in 1920 at Nagoya, Japan. It is currently headed by Mr. Hiroyasu Naito and sells its products through several subsidiaries.

They are a big name in the United States for a host of their commercial products like fryers, grillers, rice cookers, and equipment for residential usages like kitchen appliances, tankless water heaters, gas clothes dryers and a lot more.

This tankless water heater is a part of the high efficient RL series built for outdoor installation. It is suitable for meeting the hot water requirements for the entire household given its high output flow rate of 9.4 GPM.

The unit runs on propane the circ-logic technology allows one to set recirculation patterns according to one’s specific needs.

The residential warranty offered by the manufacturer on this product is 12 years, 5 years and a year for the heat exchanger, parts and labor respectively. The model is of the non-condensing type.

The high capacity of this water heater allows for the unit to serve as many as five plumbing outlets simultaneously. The device is certified by Energy Star.

This tankless water heater by Rinnai is one of the most popular products in the ‘Whole House Tankless Water Heater’ category. The product weighs about 44 lbs and the dimensions of the same are 14 x 10 x 23 inches.

Key USPs

  • Recirculation technology for higher energy efficiency
  • Good terms on the manufacturer’s warranty
  • High capacity to serve multiple outlets simultaneously
PROS:
  • Higher energy efficiency
  • Good brand reputation
  • Kit includes a variety of accessories
  • Customers impressed with the quality of construction
  • Easy to repair
  • Good range of temperature offered
CONS:

Check Reviews & Price on Amazon

11.best overall rating

Takagi T-H3-DV-N Condensing High-Efficiency Natural Gas Indoor Tankless Water Heater

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

This tankless water heater by Takagi runs on natural gas and is known for its higher than the average output flow rate of 10 GPM.

One of the notable features of this device is that it is a condensing tankless water heater. It is great for supplying hot water instantly and for on-demand usage.

The compact design of the water heater makes it extremely space-saving. There is no pilot light to worry about. The safety features are computerized.

The unit also satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx emissions. The water heater produces enough hot water for four bathrooms in warmer climates and three baths in colder climates.

The total power output of this tankless water heater is pegged at 199,000 BTUs per hour.

This Takagi tankless water heater is one of the most popular products in the ‘Whole House Tankless Water Heater’ category. The unit weighs approximately 59 lbs and the dimensions of the same are 11.2 x 17.8 x 24.9 inches.

Key USPs

  • Good hot water flow rate at 10 GPM
  • Can easily accommodate the hot water requirement of big households
  • Satisfies all the guidelines set down for gas emissions
PROS:
  • Condensing unit
  • Performs well
  • Can work under harsh weather conditions
  • Good quality components
  • Reliable and sturdy construction
  • Provides hot water instantly
  • Good value for money
CONS:
  • The installation process is a bit tedious

Check Reviews & Price on Amazon

12.best overall rating

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

One of the notable features of this tankless water heater is the good aesthetic appeal of the unit. The front of the unit is equipped with an external adjustable digital thermostatic control with LED display.

This display allows for adjustments that are as small as one degree increments or decrements.

The tankless unit boasts of a durable copper immersion two heating elements. It is a field serviceable device. The self-modulating power control of this device allows for high energy savings.

It means that the unit is turned on only when there is a demand for hot water and if the demand is turned off, the unit is also automatically powered down.

The installation of this unit is simple and the kit comes with all the required accessories for said installation.

These include a 3 feet electric cable, ½ inch NPT adapters and side ½ inch compression water connections. The water heater is 99.8% energy efficient which is one of the highest in the industry.

The kit also includes a water saver shower head. The unit is threaded for easy replacement and simple installation.

It is one of the lightest tankless water heaters in the category of whole house heaters at a meager 8 lbs and the dimensions of the same are 4 x 9 x 13 inches.

This Rheem tankless water heater is one of the most popular products in the ‘Whole House Tankless Water Heater’ category.

Key USPs

  • Extremely lightweight, well suited for wall mount
  • A good feature of temperature control
  • Kit includes all the installation accessories
PROS:
  • Rated well for the temperature control feature
  • Energy efficiency is one of the highest in the industry
  • Extremely easy to install
  • Works as advertised
  • Provides hot water instantly
  • Budget-friendly
  • Good brand repute
CONS:
  • Customers expected a better product life

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13.best overall rating

Eccotemp L10 2.6 GPM Portable Tankless Water Heater

Eccotemp L10 2.6 GPM Portable Tankless Water Heater, 1 Pack, White

This is one of the best units for an RV, given its compact size and appropriate hot water output. The flow rate of this tankless water heater is 2.6 GPM.

The kit includes a 9 inch CSA approved gas regulator and a hose. Another notable physical attribute of this tankless water heater is the stainless steel rain cap.

The maximum power output of this unit is 74,500 BTUs per hour. The unit includes a half-inch NPT to the garden hose adapter.

There is a 20-minute automatic safety shutoff timer which resets when the water stops and then starts again. It is a very useful feature for ensuring that the unit does not get overheated.

The water heater runs on liquid propane and the unit is designed for optimal use of this propane, as is common with all the products by Eccotemp.

This Eccotemp tankless water heater is one of the most popular products in the ‘RV Tankless Water Heater’ category.

Key USPs

  • Operating water pressure range of 20 PSI to 80 PSI
  • Includes a 45-degree safety tilt switch
  • Kit includes an upgraded chrome shower head and stainless steel hose
  • Frustration-free packaging
  • Well suited for camping and other outdoor activities
  • Easy to use temperature controls
  • Compact and lightweight makes it easy to carry
PROS:
  • Product is easy to install
  • Good value for money
  • Pocket-friendly purchase
  • Great for off-grid applications
  • Clean and environment-friendly unit
CONS:
  • The warranty period is short
  • Technical support could be better

Check Reviews & Price on Amazon

14.best overall rating

Girard 2GWHAM On-Demand Tankless Water Heater

The Girard Group is headquartered at San Clemente, California, United States. They are focused solely on the development of green RV products.

They introduced their first model in 2009 and over the years have continually worked and improved the quality of the products that they offer.

Their current product line includes three different models of tankless water heaters that cater to RVs of various sizes.

The unit has a system in place to regulate the burner to main the water temperature. There is freeze protection which makes it suitable for use in extremely cold weather conditions.

The maximum power output for the unit is pegged at 42,000 BTUs per hour which is more than enough for an RV.

No special plumbing or LP gas lines are required. The water heater features a quiet brushless motor which allows for noiseless operations.

The 12 V motor power operates at less than 3 amps. The unit weighs about 21 lbs and the dimensions of the same are 15.5 x 22.5 x 12.5 inches.

This tankless water heater by Girard is one of the most popular products in the ‘RV Tankless Water Heater’ category.

Key USPs

  • The onboard microprocessor monitors the incoming cold water temperature
  • Provides optimum performance for an RV’s plumbing
  • No special plumbing or gas lines required
PROS:
  • Easy to operate the unit
  • Noiseless operations
  • Good value for money
  • Ease of installation is high
  • The technical support function is good
  • Easy to set the temperature
  • The unit delivers hot water at a consistent temperature
CONS:
  • Some customers required design improvements
  • Difficult to troubleshoot

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15.best overall rating

EZ 101 Tankless Water Heater

EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE

As the name suggests, EZ Tankless was founded solely for the development and selling of tankless water heaters. The business started in 2009 for delivering innovative technology in the water heating space.

Their products are available at an affordable cost and they provide an end to end solution from installation to after-sales service for all of their products.

One of the best features of this tankless water heater is battery powered ignition. It is great for camping and other outdoor uses which require one to go off-grid. The device is easily portable as it weighs only 14 lbs.

The design is aesthetically pleasing and the installation is very simple. The ease of installation guaranteed by the manufacturer ensures that the unit can be used for semi-permanent installations.

The only installation required for this device is an area with sufficient ventilation. The battery-powered ignition makes sure that the device is suitable for areas where electricity is not available.

The ventilation of the device is such that the exterior is cold to touch, preventing accidental injuries to any person who touches it. The product is extensively tested in USA laboratories before being sold to ensure the utmost safety.

The ‘no pilot’ design is safe and convenient. The other notable feature of this tankless water heater is an automatic ignition to further one’s energy savings.

This tankless water heater by EZ is one of the most popular products in the ‘RV Tankless Water Heater’ category. The unit weighs a meager 14 lbs.

Key USPs

  • Great for off-grid applications
  • Good energy savings with the automatic ignition
  • Runs on liquid propane
  • Enables semi-permanent installation
PROS:
  • Ease of installation is high
  • Unit is easy to use
  • Portability is a big plus
  • Works as expected
  • Can operate with a wide range of water pressure
  • Technical support was helpful
CONS:
  • Product is a bit pricey
  • Some users were not happy with the temperature raise

Check Reviews & Price on Amazon

16.best overall rating

Excel TANKLESS LPG GAS WATER HEATER

Excel Pro Tankless Gas Water Heater NATURAL GAS 6.6 GPM Whole House and for Hydronic heating Compare to Rinnai, Rheem,Noritz, Bosch FREE FLUE KIT

Excel Online Store was started in 2004 making it one of the newer players in the tankless water heater business. They are based out of Miami, Florida, United States.

Some of the products that they specialize in selling are tankless gas water heaters, electric water heaters, and piping systems for gas models.

The tankless water heater by Excel runs on LPG propane gas. The water activation pressure needed for this model is a meager 2 PSI and therefore it does not require any pressurizer pump.

One of the most convenient features of this device is the vent-free technology. No expensive flue is required.

The water heater is equipped with a pure copper heat exchanger and the manufacturer offers a limited lifetime warranty on this exchanger.

The kit that comes along with this unit offers a free LPG flare brass adapter for a gas regulator. It is well suited for all types of off-grid applications.

The unit is designed well and it has a good aesthetic appeal. The compact size allows for easy installation in even the tightest spaces.

One of the safety features of this tankless water heater is the state of the art Oxygen Depletion Safety shutoff. The unit can comfortably support an entire home with 2 ½ baths.

The heat exchanger is made of pure oxygen-free copper which makes it extremely thermally efficient and durable. The unit is very lightweight at just 20 lbs and the dimensions of the same are 18 x 7 x 14 inches.

This Excel tankless water heater is one of the most popular products in the ‘RV Tankless Water Heater’ category.

Key USPs

  • Operating water pressure range of 2 PSI to 120 PSI
  • Safety features include automatic shutting off the heater in case of oxygen depletion
  • Equipped with a magnetic flow sensor
  • Does not require any ventilation
PROS:
  • Ease of installation is high
  • Temperature control feature is commendable
  • The technical support function is helpful
  • Good fuel savings
  • Performance is as expected
  • Provides unlimited hot water on demand
CONS:
  • Customers had trouble with getting the unit functioning smoothly

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17.best overall rating

CAMPLUX ENJOY OUTDOOR LIFE 

Camplux 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater

One of the notable features of this unit is that it can work with water pressures as low as 2.81 PSI. The design is kept simple and aesthetically pleasing so that it can be installed easily at any place.

There is a folding handle for easy portability. The hot water output promised by the unit is 1.58 gallons per minute.

The savings in the energy are immediately noticeable and serve the customers well for many years. It guarantees the delivery of endless hot water with optimal energy efficiency.

The maximum temperature raise and minimum temperature raise achievable by this unit is 114.8 ℉ and 46.4℉ for 1.58 GPM.

Some of the notable safety features of this device are flame failure protection, anti-freeze protection and oxygen depletion safety shut off protection. The kit includes a variety of equipment for installation.

The operating propane gas pressure is 0.4 PSI. The maximum power output of this unit is 41,000 BTUs per hour.

The tankless water heater weighs a meager 14 lbs making it very portable and the dimensions of the same are 11.6 x 4.3 x 17.3 inches.

As the name suggests, this Camplux tankless water heater is one of the most popular products in the ‘Outdoor Tankless Water Heater’ category.

Key USPs

  • Battery-powered ignition
  • No water pump needed as it can detect water flow with a low pressure
  • Operating water pressure range of 3.0 PSI to 110.0 PSI
  • Fitted with a stainless foldable portable handle
  • Aesthetically pleasing and sleek design
PROS:
  • Portability is a good feature
  • Aesthetically pleasing design
  • Ideal for off-grid applications
  • Kit includes a variety of equipment
  • CSA certified
  • Easy to use
  • Ease of installation is high
  • The temperature control function is very precise
CONS:
  • Some users reported leakage

Check Reviews & Price on Amazon

18.best overall rating

Eccotemp L5 Portable Tankless Water Heater Shower

Eccotemp L5 Portable Outdoor Tankless Water Heater

Being lightweight is one of the key USPs of this tankless water heater. The unit is very compact which makes it easy to carry around and use for off-grid applications like camping, washing pets, outdoor showers and much more.

It runs on a standard 20 lbs liquid propane tank and is equipped with electronic ignition.

The ignition is powered by 2 D cell batteries making it ideal for on the go. The unit is also tested and fitted with various safety measures.

These include a safety shutoff that is activated when the unit runs for more than 20 minutes. This ensures that the tankless water does not get overheated.

The other safety measure ensures that the unit shuts down when it is tilted more than 45 degrees in either degree.

The tankless water heater gets activated even at the low pressure of 20 PSI. It is easily connectable to any standard garden hose. The hot water output of the unit is rated at 1.5 GPM.

The achievable temperature range by this device is 50 ℉ to 140 ℉.

This tankless water heater by Eccotemp is one of the most popular products in the ‘Outdoor Tankless Water Heater’ category. The unit weighs a meager 14 lbs and the dimensions of the same are 16.5 x 11.5 x 5.5 inches.

Key USPs

  • Great for outdoor usage like for camping, in farms, for outdoor showers or bathing pets
  • Provides hot water instantly
  • Wide range of temperatures offered
  • Frustration-free packaging
  • Easy to use temperature controls
  • Safety features
  • Low-pressure activation
PROS:
  • Provides hot water at consistent temperatures
  • Great for outdoor usage
  • Good design for greater ease of use
  • Works as advertised
CONS:
  • Might require a water pump at low water pressures

Check Reviews & Price on Amazon

19.best overall rating

AO Smith ATI-540H-N Condensing Residential/Light Commercial Tankless Heater

AO Smith ATI-540H-N Condensing Residential/Light Commercial Tankless Heater

A manufacturer of commercial and residential water heaters, A. O. Smith Corporation was founded way back in 1874 by a Mr. Arthur Oliver Smith.

It is a well-recognized name in the industry today owing to this recognition of being the largest manufacturer of water heaters in North America. They are also widely known for their water purifier product line.

The company is headquartered at Milwaukee, Wisconsin, United States but sells its products all over the world.
One of the key notable features of this tankless water heater is that it is equipped with an air to fuel ratio sensor.

The safety features of this unit include exhaust and water temperature safety control. There is an overheat cutoff fuse.

The output flow rate of hot water is 9 GPM, however, this varies according to the temperature of the incoming groundwater.

The 4-inch pipe vents up to 50 equivalent feet and a 3-inch pipe vent up to 25 equivalent feet. This is a condensing type model which is suitable for residential as well as light commercial usage.

The unit runs on natural gas. The maximum and minimum power output of this tankless water heater is 199,000 BTUs per hour and 13,000 BTUs per hour respectively.

The unit is slightly heavy at 59 lbs and the dimensions of the same are 12.5 x 18.5 x 29.5 inches.

This tankless water heater by AO Smith is one of the popular products in the ‘Commercial Tankless Water Heater’ segment.

Key USPs

  • A high flow rate of 9 GPM
  • Residential warranty terms of 12 years and 5 years on the heat exchanger and parts respectively
  • Commercial warranty terms of 5 years and 5 years on the heat exchanger and parts respectively
  • Condensing type tankless water heater that reduces emissions
PROS:
  • Great value for money
  • Reputed and trusted brand
  • Good flow rate
  • Great aesthetic design
CONS:
  • Slightly on the heavier side

Check Reviews & Price on Amazon

20.best overall rating

Noritz NC380-SV-ASME NG ASME Indoor/Outdoor Tankless Natural Gas Water Heater

Noritz NC380-SV-ASME NG ASME Indoor/Outdoor Tankless Natural Gas Water Heater, 13.2 GPM

Headquartered at Fountain Valley, California, United States, Noritz manufactures and sells a wide range of residential and commercial tankless water heaters.

Their products are sold through a well-established network of contractors and home builders.

They provide quality after-sales service in terms of warranty servicing and helping potential customers finding the nearest dealers that sell their products via their website.

Being a commercial tankless water heater unit, this Noritz model has the highest flow rate at 13.2 GPM. The power output of the heater is very high at 380,000 BTUs per hour.

One of the notable features of this device is the extremely low activation rate of 0.07 GPM. The device needs a 4-inch category III stainless steel venting.

The thermal efficiency of this unit is at 80%. The water heater is fitted with an HRS35 copper heat exchanger casing with a special protective coating. The unit also boasts of an ASME accreditation.

Its high capacity allows for it to serve the hot water demands of resorts, hotels and housing complexes.

Noritz also provides a system controller which can be used to connect as many as 24 units which prove to be equivalent to 316 gallons at 9.1 million BTUs.

This tankless water heater weighs 105 lbs and the dimensions of the same are 39.3 x 24.3 x 13.3 inches.

This Noritz tankless water heater is one of the popular products in the ‘Commercial Tankless Water Heater’ segment.

Key USPs

  • Runs on natural gas
  • ASME certified model
  • Non-prorated 5-year Commercial Warranty on the heat exchanger and parts
  • Able to serve hot water needs on a large scale
PROS:
  • High flow rate
  • Great thermal efficiency
  • Good quality components
  • Great product design
CONS:

Check Reviews & Price on Amazon

Buying Guide for Tankless Water Heaters

Eccotemp L5 Portable Tankless Water Heater Shower

The following are a few parameters that one should keep in mind while purchasing a tankless water heater. Reading through this guide will be a good starting point in developing a logical approach to selecting a good model for one’s hot water needs.

Type of Tankless Water Heater Model

Hot water can be sought from a variety of different models which are discussed in detail in the following section.

Briefly, these models can be electric, gas, indoor installation, outdoor installation, for a whole house, for an RV, permanent mount, portable, condensing, non-condensing, hybrid, residential, commercial, point of use, multiple-use, and the list goes on.

If one is looking for higher efficiency (even in colder climates) and do not mind shelling out a little more money, the gas model of tankless water models is the way to go.

Electric models work well when the weather conditions are warm and they do not have a carbon footprint as compared to the gas models.

There are models which are designed specifically for indoor or outdoor installation, depending upon the requirement of the user.

If one is looking for getting hot water while on camping trips or in their RVs, there are special tankless water heaters made for fitting into these mobile homes.

There are also point-of-use water heaters that are very compact and designed to service only a single faucet and on the other end of the spectrum, there are water heaters that can serve multiple faucets at the same time without compromising on the water temperature.

The kind of ventilation and heat exchanger models that are fitted is also something that can be used for categorizing the water heaters into three different varieties, discussed in the next section.

Flow Rates

The flow rate of tankless water heating models can vary from as low as 1.5 GPM to as high as 12 GPM in some models.

The choice of which model to select depends on how many faucets or outlets will be connected to the water heater, what the climatic conditions of the region are and what is the temperature of the incoming groundwater.

The specification guide book which comes along with each model specifies the exact temperature raise that can be expected from the model given specific input conditions. This greatly eases the decision of which model to purchase.

In colder temperatures, a higher flow rate would be recommended to service a demand which could easily be catered by a lower flow rate in warmer climates.

Place of Installation

There are two options available to the buyer in terms of place of installation. The unit can be installed indoors or outdoors, depending upon the model purchased.

If the aesthetic appeal of the household is of utmost importance, outdoor models are recommended.

On the other hand, there are indoor models which are extremely compact and can be fitted into the smallest of spaces to not disturb the look and feel of the space.

The distance between the water heater and the faucets that it services is also an important consideration when it comes to measuring the performance of the water heater.

If the distance is too much, it might take a longer amount of time for the hot water to reach the faucet and there will also be energy wastage along the way.

The water heaters that are built for RVs are extremely compact and easily fit into the recess box provided specifically for installing the water heater, however, careful consideration should be given to the specifications of the heater and the RV to make sure there is not a significant difference in terms of what is required and what is supplied.

Point(s) of Application

The buyer has a choice of purchasing a single big model to serve multiple faucets at once or buying many smaller ones for serving different faucets.

There are different cost implications in each scenario. With an increase in the number of units to be installed, there will be an increased cost of purchasing separate installation equipment for each water heater, however, it will make sure that there is always ample hot water available for use.

On the other hand, installing a single high capacity unit does have benefits in terms of cost and may be able to serve all the faucets well, however, over time, the performance of the unit may get compromised.

Another factor which comes into play is the increased distance between the water heater and the multiple hot water outlets.

Energy Efficiency

This is a factor that many manufacturers place a heavy emphasis on. Most of the tankless water heating units are certified by energy star.

This is due to the growing consciousness towards creating environmentally friendly products and the increasing consumer awareness regarding the need for purchasing these products.

Water heating costs make up for a significant amount of the electricity and gas bills which means that it is necessary to purchase a water heating model that will optimize the use of these resources and prove to be cost-effective over the long term.

Post Purchase Costs

There are a certain amount of costs involved in terms of post-purchase of tankless water heaters.

These costs involve the fees for a licensed technician to come and install the unit, the equipment needed for installation, the installation gear, the rework needed inside the house or outside (whichever applicable).

The costs will be typically higher for a gas model of tankless water heaters and if the installation is indoors, the costs will be higher as compared to outdoor installation.

Brand

Brand plays significantly into the purchase decision. Some of the well-known brands in the business are many years old and over these years have acquired a huge and loyal customer base.

Their customer service is also more accessible and there are a significant number of customer reviews to rely on for getting more information about the product.

Price

One of the last factors that often greatly influence the decision is the price of the product. The more expensive products are generally offered by brands of repute and customers think twice before purchasing these.

However, it is not good practice to not buy a product just because the price is high. These can serve better in the long term and pay off these high initial costs.

Therefore, one has to carefully strike a balance between the price and product quality tradeoff.

These are some of the factors that one should keep in mind when purchasing any type of tankless water heater to make a better-informed decision.

Types of Tankless Water Heaters

Camplux 10L Outdoor 2.64 GPM Digital Display Portable Propane Gas Tankless Water Heater

The categorization of water heaters can be done based on several different factors. A few of these categorizations are discussed below to get a fair idea about the various models available in the market.

On the Type of Power Source

The power source of a tankless water heater can either be, electric or gas (natural gas, liquid propane, petroleum, etc.)
The electric models rely on a steady supply of electricity to run properly. These are generally good for indoor usage or usage in a place where one can ensure that the electricity supply is fairly steady. There are no emissions involved in these models.

The gas models require a steady supply line of gas. These are more efficient than the electric models; however, on the offside, they also have NOx emission. These models also require a proper ventilation system to carefully dispose of these emissions.

On the Place of Installation

The tankless water heaters can be installed either indoors or outdoors. This specification can change depending on the model and is usually stated by the manufacturer in the manual that comes along with the tankless water heater model.

The indoor models are built for installation inside the house and are usually very compact in design to aid in the process of installation. This small size allows the unit to be fitted even in the tightest corners with ease.

These units should strictly be mounted inside as they may not have the required protection needed for outdoor installation.

The units for outdoor installation are usually more rugged in their structure and design.

They come with extreme weather protection which allows them to function safely even if the temperatures of the region are too low or too high. They are also suitably equipped for protection against rains and sediments.

Some units can be installed either indoors or outdoors, depending on the type of make and model.

On the Type of Combustion Models

There are three broad categories of tankless water heaters in this type of classification.

Non-Condensing Models

These models are the first generation tankless water heaters that make use of one heat exchanger that heats the water to meet the needs of the faucets or appliances connected to it.

These models need expensive and elaborate venting systems and typically have lower energy efficiencies.

Condensing Models

These can be considered the next-generation models of tankless water heaters as they have a primary and a secondary heat exchanger.

The secondary exchanger makes use of heat from the first one, thus, optimizing the device and increasing the overall thermal efficiency of the unit.

Hybrid Models

In this model, there is typically a small tank with a capacity ranging from 1 gallon to 2 gallons acting as a reservoir of hot water.

This third-generation design increases the efficiency even more and makes sure that the “cold water sandwich” issue gets addressed, which may occur in the first or second-generation models.

This type of model is not widely available as the idea is still fresh and only a few niche companies have incorporated this design into their products.

On the Point(s) of use

Most tankless water heater models are built for serving multiple faucets or appliances. These numbers vary according to the weather or the incoming groundwater temperature but an average-sized tankless water heater can serve three or more faucets at the same time.

However, some individuals require only a small tankless water heater for supplying hot water to a single hot water outlet. There are companies which manufacture dedicated unit for such use.

These are called ‘Point-Of-Use’ tankless water heaters and are extremely compact. These can be fitted under the sinks for ensuring hot water supply to the sink faucet and many such other small requirements.

With these classifications, one can get a broad idea of the types of tankless water heaters available at their disposal.

Apart from these, the water heaters can also be classified based on their size (portable vs. wall mount units), brand, and price.

There are many well-known manufacturers in this market that have been engineering and selling tankless water heaters for several years as well as newer players with a focus on making eco-friendly products available to the audience.

Benefits and Limitations of Gas Tankless Water Heaters

Camplux 10L Outdoor 2.64 GPM Digital Display Portable Propane Gas Tankless Water Heater

The following are some benefits of a gas tankless water heater.

Higher Efficiency

Time and again, it has been established that a gas tankless water heater will be able to supply a higher flow rate in gallons per minute as compared to an electric tankless water heater.

This is a result of the higher efficiency of a gas tankless water heater.

When compared to a tank model of gas water heaters, they also occupy less space and deliver a similar output.

Lower Long Term Costs

Natural gas is a cheaper alternative to electricity and therefore, over the long run it is cheaper to run a gas-based tankless water heater as compared to electricity.

Reliable

The electricity supply in any region is not as fail-safe as compared to a gas line. There may be events of a power outage or power surges which renders an electric tankless water heater useless.

However, in case of a gas model, the supply of gas is fairly steady and these models are equipped with a battery-powered ignition which completely removes the unit’s reliance on the availability of electricity.

The following highlight some of the limitations of a gas tankless water heater.

Environmental Impact

As efficient as any gas tankless water heater may be, these models have a certain amount of environmental impact as there are NOx emissions involved.

These emissions are strictly regulated by the laws set down by the state. These cannot be eliminated; however, the manufacturers have been making efforts to keep these in check.

Safety Risk

Some models of tankless water heaters (gas) make use of pilot light for ignition which is a safety risk. However, many manufacturers have removed this dependency in the newer models.

As mentioned in the previous point, since there are gas emissions involved, these units have to be ventilated properly to ensure that there are no residual emissions inside the house.

Any leakages in the gas or the exhaust pipes can have serious repercussions and are, therefore, a major safety risk.

The exhaust pipe should also be properly insulated as it is very hot to touch and anyone coming in contact with the pipe can get injured.

Benefits and Limitations of Electric Tankless Water Heaters

EZ 101 Tankless Water Heater - Propane (LPG) - Portable - Battery Powered Ignition - Camping - RV - FREE UPGRADE

The following highlight some of the benefits of an electric tankless water heater.

Initial Costs are Lower

The initial costs of purchase of an electric tankless water heater are significantly lower as compared to a gas tankless water heater.

These models are available in a wide variety depending upon the desired capacity, installation type, etc. This ensures that there is a quality model available for every kind of need at a variety of price points.

Safe

Since there are no emissions involved and there is no scope of a pilot light, the electric tankless water heaters are very safe and the additional worries of any leakages are also eliminated.

Environment-Friendly

As mentioned previously, there are no emissions involved. This makes the unit environment-friendly as there are no long-lasting effects or carbon footprints in the long term use of these models.

The following are the limitations of an electric tankless water heater.

Lower Efficiency

The heating time required by an electric tankless water heater is relatively higher than a gas tankless water heater. This also means lower efficiency.

A gas and electric tankless water heater of the same capacity will take different amounts of time to heat the same amount of incoming water.

This also means that the cost of electricity consumed to heat a certain amount of water is higher than the cost of gas required for heating the same amount of water.

Higher Long Term Costs

Natural gas is significantly cheaper than electricity and therefore, in the long run, the costs of running an electric tankless water heater are higher than a gas tankless water heater.

These differences also arise out of the lower efficiency of an electric tankless water heater. These costs are heavily dependent on the electricity costs of a particular region.

Susceptibility to Power Outrages

A steady and reliable supply of electricity has to be guaranteed for a reliable performance by the electric tankless water heater. Without this, the performance of the unit is highly impacted as it is the primary source of energy for the unit.

Tankless vs. Tank Water Heaters – A Cost Comparison

Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Installation

The costs of a water heater can be split into three parts, namely, the purchase price, the installation costs and then the long term running costs. Below we see a comparison of the tankless and the tank variety of water heaters on these three parameters.

Purchase Price

It is a known fact that the most common tankless water heaters will put a sizable dent in your pocket. The average costs for a tankless water heating unit can easily fall anywhere between $1,000 and $2,500.

The tank models have a significantly lesser price, in the range of a few hundred dollars to $1,000. There is a big difference here that comes into play.

Installation Costs

The tankless water heaters are pricier when it comes to the installation as well. Some units require dedicated gas lines owing to the high power output (high BTUs per hour).

There is also proper venting and flue systems required for the gas models. All of these installations have to be taken care of by a licensed technician sent by the manufacturer for the warranty to hold.

A tankless water heater costs almost three times as much as the tank variety of water heater taking the purchase price and the installation costs into consideration.

Operating Costs

It is a known fact that since a tank model of water heater has to hold water as per the capacity of the tank, there is constant consumption of gas or electricity to maintain the water heater at the temperature desired by the user.

This leads to higher consumption and therefore higher bills. The tankless models are activated only when there is a flow of water detected and the rest of the times, it stays in a standby mode of sorts which ensures that there is no wastage of resources.

These differences add up over time to make a big difference, in favor of the tankless water heaters.

Savings

The annual average savings of a tankless water heater are to the tune of $108 as compared to the $44 of a tank model. Therefore, along with the costs, the savings are also higher for a tankless model.

Although this difference is not enough to offset the higher costs of the tankless models, people are still opting for these models for a variety of other perks.

Some of these perks include a better warranty, higher efficiency, better design, better customer support, more environment friendliness.

A host of these factors are gradually moving the customer preference towards the tankless water heaters.

FAQs

What is a Tankless Water Heater?

A tankless water heater, as the name suggests, heats the water as it passes through the unit without storing it. The unit is automatically powered on when there is a water flow detected and it heats the water instantly (on the go) before sending it to the required faucet or appliance. There is no wastage of gas or electricity on storing the water or keeping the device constantly on, even when there is no need.

How many Tankless Water Heaters are Needed for my house?

There are many different models of tankless water heaters available in the market which can serve different types of purposes. These models differ in the number of faucets they can serve, the place of installation, capacity, etc. One has to carefully consider their own needs and then decide if they want to purchase several smaller models or a big one to fulfill their hot water demand.

What to do if I get Hard Water?

The tankless water heaters do not store water so the time it takes for a buildup to occur is significantly longer than in a tank model of water heaters. However, if needed, a water softener can be used to avoid damage to the sensitive copper elements inside the water heater. This will help in prolonging the life of the water heater.

How to size the Tankless Water Heater Properly?

There is a proper specifications manual that is packed with every tankless water heater. This manual indicates the hot water output of a tankless water heater, in terms of the number of showers, depending on the incoming water temperature, the desired temperature raise, the weather of the region, etc. These factors can help in selecting the best model which will fit the water requirements accurately.

Do tankless water Heaters Work at High Altitudes?

Tankless water heaters are of two types, electric and gas models. The electric tankless water heaters are not affected by altitude and work perfectly at any given height. The gas tankless water heaters lose 4% of its power output (BTUs per hour) for every 1,000 ft elevation beyond 4,000 ft. Taking this into consideration, several manufacturers point out specifically if the heater can be used at different altitudes.

Summary

Having read through all the section above, it can be deduced that the consumer today is aware of their choices and are actively seeking more options that are environmentally friendly and also budget-friendly.

The wide variety of choices available in tankless water heaters is because more and more people are opting for these models in their home and office spaces.

The correct buying guide and research on different models will ultimately ensure that one picks the accurate model for their needs.

Here is the list of our top picks again for you. Check out the specs, customer reviews, price and offers on Amazon –

 

Last update on 2020-07-03 / Affiliate links / Images from Amazon Product Advertising API

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Our team consists of enthusiastic and passionate people from different fields and experience. Some are geeks and spend most of their time among gadgets while others love nature and are always on the move! We spend 10s of hours researching and writing on each topic. The articles are then quality checked by our editors. View our "About us" section for more details about process and team.

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