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EcoSmart US, LLC is a company that manufactures tankless water heaters for a variety of uses.

EcoSmart has a patented self-modulating technology that can save up to 50% in utility bills compared to tank-style water heaters.

All EcoSmart products are ETL and FIDE certified, and adhere to the standards set by CSA.

EcoSmart ECO 27 is an electric tankless water heater that is capable of providing hot water to an entire single-family home at moderate climates.

This product is instrumental in saving energy and money in heating bills, owing to its self-modulating technology that spends energy depending on the hot water required.

Key Specifications

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

EcoSmart ECO 27 is one of the largest electric tankless heater available in the market with the patented self-modulating technology.

It has a high efficiency of 99.8% and can perform well in colder climates also.

At temperatures as low as 37˚F, it is capable of producing an output flow rate of 3 GPM. The output flow rate increases as the inlet water temperature rise.

Let us look at the different output flow rates it is capable of producing at different temperatures – 

Inlet temperature (˚F) Hot water flow rate (GPM)
37 2.7
42 2.9
47 3.2
52 3.5
57 3.8
62 4.3
67 4.9
72 5.6
77 6.6

Specification Table – EcoSmart ECO 27

The other key specifications of the EcoSmart ECO 27 are as given below – 

Dimensions 17"H x 17"W x 3.625"D (in inches)
Weight 14.7 lbs.
Activation flow 0.3 GPM
Pipe fittings ¾" NPT
Voltage 240 V
Phase Single
Power 27 kW
Amperage draw 113 A
Required breaker 3 × 40 A
Required wire 3 × 8 AWG
Certifications UL-499, ETL listed


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

EcoSmart ECO 27 is one of the heavier models in the ECO series but is still compact and light for the output it gives.

Installation can be done by someone familiar with plumbing and electrical wiring connections. However, EcoSmart recommends that the product be installed by trained professionals.

Installation locations are not limited as this water heater does not require venting and can fit into small spaces.

Ensure that the minimum clearance values are maintained while installing the product so that it is not in the direct vicinity of materials that can be harmful to the product.

Follow the steps provided in the installation manual carefully while doing the plumbing and electrical connections. Handle all components with care and do not over-tighten the connections to avoid permanent damage to these parts.

Fixing a flow regulator at the outlet of the heater would enhance the heater performance. The flow regulator is capable of adjusting the output flow rate so that the water temperature does not become colder than the set value.

One important thing to note is that if the installation is done by a person without a proper license, EcoSmart does not provide any warranty services for the product.



EcoSmart Green Energy Products has a limited lifetime warranty service for all its registered products. The warranty covers the heat exchanger and all electronic parts that come with the product.

The warranty can be claimed if the product had been registered within 30 days of purchase. The warranty becomes void if registration was not done within that time period.

If the product is installed in locations outside the US or Canada, the warranty services apply for only 5 years after purchase.

The services do not cover labor charges.

Any damages on a fresh product being identified within 30 days of purchase or prior to installation are subject to replacement or full refund by the company, given that the product is in the same condition as it was when it was bought.

The repair and replacement services are not applicable in case of the following events.

  • Damages caused by lime-scale accumulation, corrosion, or freezing.
  • Any issues caused by improper installation, operation or irregular maintenance.
  • Damages to the heating element caused by air in the pipelines that was not removed before operation.
  • Failure in following the local, state, or national codes during installation.
  • If the product was installed by someone without a proper license. Electrical connections and plumbing connections must have been done by someone trained in those respective fields.
  • If any damages to the product is caused by misuse, accidents, and unapproved applications or due to power surges.
  • Damages not directly caused by any manufacturing defects.
  • Labor charges, shipping and delivery charges, handling charges, and other miscellaneous charges are not covered in the warranty.

To avail the EcoSmart Green Energy Products’ limited warranty services, place a toll-free call to EcoSmart at 877-474-6473 or contact the office at the address 400 Captain Neville Drive, Waterbury, CT, 06705.

Care and Maintenance

EcoSmart recommends maintenance procedures for the product to be done annually to check for any leaks, weaknesses and any minor damages in the heater parts.

Apart from these tasks, the heater has to be cleaned regularly to prevent dirt accumulation in the nooks and grooves of the heater.

Checking for any lime-scale build-up in the heater is to be done once every year or more frequently if the heater is placed in a location that has hard water.

Flushing of the water heater has to be done to remove the mineral build-up.

Drain the water heater whenever it is not in use, especially in colder regions to avoid the formation of ice in the pipelines.

It is important to not perform any maintenance tasks before switching off the power to the heater. Serious injuries to the human body or damages to the product may occur if not done so.

While performing these maintenance procedures, it is possible that some air might have entered the pipelines, sandwiched in between the water segments.

Such stray air must be removed from the pipes, otherwise, the heating element might get damaged permanently.

For any issues with the water heater that might require assistance, place a call to the toll-free number 1-877-474-6473, or reach out to the support team at [email protected].

Consumer Comments

EcoSmart ECO 27 has received mixed reviews from the customers. Although several users have praised the product and its efficiency, there are some users who have not been satisfied with its working.

Most customers are happy with the product and its payback. Its modest price and high flow rates are capable of providing hot water to a small family. It provides consistent and unlimited hot water along with great energy savings.

Users are purchasing this product for installation in two-bathroom homes, condos and other similar spaces.

Users can claim warranty for any damages under the manufacturer’s terms and conditions at any time after the purchase of the product.

However, some consumers have failed to obtain a warranty for the product due to improper/not understanding of the terms.

Some users have also claimed that the hot water at the farthest tap is not as cold as the closest fixture. There have also been complaints about the hot water taking too long to reach the tap.

However, these are problems that arise with installing the heater too far away from the fixtures. Users will get maximum benefits from the product if they follow all the instructions provided in the manual carefully.



EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White
3,402 Reviews
EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White
  • Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
  • Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
  • Copper and stainless components designed for efficiency, durability and easy replacement.



  • The high energy efficiency of 99.8% helps save a lot of energy as well as money, up to 50% in heating costs.
  • Lifetime warranty for the heat exchanger and all electronic parts provided by EcoSmart.
  • The product is easy to operate and maintain.
  • It requires a small space for installation and can save up to 12 feet of storage space.
  • Digital temperature control with one-degree increments provides easy temperature settings.
  • It has an advanced self-modulating technology that allows it to adjust the energy input based on the required amount of hot water.


  • If the minimum electrical requirements are not met with, expensive upgrades to the current electrical configuration of the house may be necessary.
  • The warranty can only be availed if the product is installed by a professional and if the product is registered within 30 days of purchase.


Recommended Accessories

Service Valve Kit


Watts LFTWH-FT-HCN Service Valve Kit for Tankless Water Heater


Heating Element

Ecosmart HE HE 90240 ECO 27 Replacement Part


Flow Sensor Assembly

Ecosmart FSA QC MEDLRG ECO 24 Replacement Part



Is a flow Regulator Necessary for the Operation?

The heater runs fine without an output flow regulator. However, installing one will improve the performance of the heater and help save more energy as well.

Does EcoSmart ECO 27 come with all Parts?

Yes. This product comes with all required parts for installation. You need not buy any component separately. However, the flow regulator which is an optional but recommended accessory has to be bought separately.

Can I avail Warranty if I Have Installed the Heater myself?

To avail warranty services, the plumbing and electrical installations have to be done by people with the respective licenses. All service receipts are necessary to claim warranty. If the user is qualified for such installations, then warranty services may apply.

Our Recommendation

The EcoSmart ECO 27 is ideal for providing hot water to an entire household in the northern US states and Canada. It can be used for applications that demand a large amount of hot water like Jacuzzis in warmer regions.

If a high-efficiency, compact, and energy-saving water heater is what you are after, then the EcoSmart ECO 27 is the perfect choice for you.

We recommend this product for installation in single-family homes as it is capable of supplying unlimited hot water for a whole family.

However, if you feel like the output flow rate is not enough for your household needs, do not purchase this product.

It is important to understand the operating capacity of the heater, as well as any upgrades that you might need to do prior to installation.


Last update on 2022-12-01 / Affiliate links / Images from Amazon Product Advertising API

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