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Rinnai V65eP Tankless Water Heater Review

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Rinnai is a Japanese multinational company that is headquartered in Nagoya, Japan. Currently, Rinnai has over 20 subsidiaries and manufacturing companies in 16 countries.

All their products being distributed in North America have been approved by CSA and ANSI, and all their factories have ISO 9001 and/or ISO 14001 certifications.

The Rinnai V65eP is a high-efficiency gas-type tankless water heater that uses propane as the fuel. It is a non-condensing heater that can supply water for 2 to 4 fixtures.

It has a compact build and has flow rates suitable for small or medium-sized households.

Key Specifications of Rinnai V65eP

Rinnai V65EP 6.6 GPM Outdoor Low NOx Tankless Propane Water Heater Rinnai V65eP is a product that specifically uses propane as the fuel to heat water. It is meant for outdoor installation and can also be installed in mobile homes. It can be used at high altitudes up to 10200 ft.

It is capable of controlling the water flow using a water flow sensor, electronic water control and a fixed bypass control present in it.

It has inbuilt safety devices that deal with flame failure and current surges if and when they occur.

Rinnai V65eP – Specification Table 

Some additional specifications of Rinnai V65eP are as follows.

Parameter Specifications
Dimensions 14.04in. × 24.3in. × 9.6in.
Weight 43.6 lbs.
Flow rate 6.5 GPM
Energy factor 0.82
Minimum Gas consumption (BTU/h) 10,300
Maximum Gas consumption (BTU/h) 150,000
Temperature With remote 98˚-120˚F (factory setting) or 98˚-160˚F
Temperature Without remote 120˚F (factory setting) or 140˚F
Sound level 55 dB
Gas supply pressure 8 in. W.C to 13.5 in. W.C
Water supply pressure 20 PSI (minimum) and 150 PSI (maximum)
Ignition Direct electronic ignition


Rinnai V94eP is an outdoors-installed tankless water heater that comes with an MC-91-2 temperature controller.

It must be installed by someone who is familiar with gas sizing, connecting various pipelines, and the necessary national, state, and local codes.

Choose an installation location that is not close to inlet or exhaust vents of any type. Maintain the minimum clearances specified by the manufacturer.

After selecting an appropriate location, mount the heart in an upright position.

Remove the front panel before proceeding with the remaining procedures. Proceed with the plumbing, gas supply, and electrical installations in accordance with the national or local codes.

Finally, install and mount the temperature controller according to the steps provided in the manual.


Rinnai recommends that a trained professional do the installation process.

For any defects in the materials or workmanship during installation and operation, Rinnai offers a limited warranty subject to certain terms and conditions.

The warranty periods are described in the following table.

Item Residential applications(Warranty in Years) Residential applications with isolation valve kit installed (Warranty in Years) Residential water and space heating applications (Warranty in Years)
Heat exchanger 10 12 10
Other parts 5 5 5
Labour 1 1 1

If the heater is used in a hot water circulation loop, in which all the circulating water flows through the heater, the warranty is reduced to 3 years from the date of manufacture.

The limited warranty also does not cover any damages due to the following reasons.

  • Damages due to improper installation, misuse, accident or abuse of the product.
  • Damages due to improper maintenance such as mineral build-up and freezing of the product parts.
  • Removing or adding any approved parts to the product.
  • Inappropriate applications such as using the product for solely space heating purposes.
  • Any damages that occur to the product that are not directly due to manufacturing defects or workmanship issues.
  • Usage of water that is not potable or is of poor quality.
  • Damages caused by fires, flooding, power surges, or any other natural disasters and causes.

Installation of the product in places outside of the US and Canada.

To avail the warranty services, contact your place of purchase, or visit the Rinnai website – www.rinnai.us, or place a call to 1-800-621-9419, or write to Rinnai at 103 International Drive, Peachtree City, Georgia 30269. Proof of purchase is essential to obtain these services.

Care and Maintenance

Maintaining the heater means keeping it clean and preventing any damages to the heater by regularly doing the maintenance tasks specified by the manufacturer.

Contact a trained professional to perform the maintenance procedures to avoid any harm to self and the product.

The heater requires regular cleaning in order to avoid build-up of dirt and debris in the nooks of the heater. The water heater should be cleaned with a soft, damp cloth and a mild detergent.

Flushing the water heater and manually operating the pressure relief valve has to be done at least once every year.

The water filter at the heater inlet must also be cleaned regularly. The heater components, especially the pipes, must be freeze protected to prevent blocks in the pipes.

When the heater is not being used for a long period of time, shut off the power, gas and water supplies to the heater, and then drain the heater. Ensure that the same is done when any maintenance procedure is being done as well.

Consumer Comments

Rinnai V65eP has received generally positive reviews from customers on its endless supply of hot water, as well as its capability to run more than a single fixture simultaneously despite its small size.

The unit has been reportedly used by some users for 5 to 10 years without it slowing down, making it a robust and reliable product.

The digital temperature control unit has proved to be of great help to the users as it allows the temperature to be set from inside the house itself. One need not go outside to the heater itself to do this task.

Users have also claimed that the unit can be easily installed with basic wiring and piping knowledge. It has also helped users save money on utility bills as it does not need a pilot light to ignite the burner.

Some users, however, have complained about not being able to change the factory settings of the temperature.

This feature has been included by the manufacturer to avoid any unintentional tampering by children and can be changed with the help of a trained professional.



Rinnai V65EP RV65eP, Large, Propane
160 Reviews
Rinnai V65EP RV65eP, Large, Propane
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit



  • It is a high-efficiency water heater with an energy factor of 0.82
  • It comes with a Wi-Fi accessory that enables remote monitoring and control.
  • It is capable of being operated in manufactured homes and in high altitudes.
  • It has very low NOx emissions of the order 20ppm.
  • It has inbuilt safety devices as well as an advanced scale detection system.
  • Does not require any venting installations as it is an outdoor unit.


  • It is not shipped with an installation kit and it has to be purchased separately.
  • Not suitable for large households.


Our Recommendation

Rinnai V65eP is a highly efficient and robust tankless water heater that has several in-built features absent in other tankless heater units. Its generous flow rate, small size, and ease of monitoring make it an ideal choice for a house of one or two.

It performs incredibly well throughout its service time and can be operated very easily by the users.

For the features. For the in-built functions, advanced features and reliability that this heater provides for a very modest price, we highly recommend this heater for use in small to medium-sized households.


Recommended Accessories

Some of the auxiliary products that are frequently bought with Rinnai V65eP are as follows.

Tankless Water Heater Service Valve Kit Webstone 44443WPR 3/4-Inch IPS Isolator EXP E2 Tankless Water Heater Service Valve Kit with Clean Brass Construction





Can it be used in Places where Temperatures go Below Zero?

Yes. It can be operated in very low temperatures. But ensure that the heater is drained in the event of a power failure. A solenoid kit can be installed for this purpose.

What does low NOx Mean?

Low NOx means that the heater lets out limited amounts of nitrogen oxides when it burns up the propane to heat the water. It also leaves a low carbon footprint on the environment.

What does the Name V65eP Specify?

‘V’ represents the Rinnai series of high-efficiency tankless water heater, ‘65′ stands for the heater’s flow rate of 6.5GPM, ‘e’ means external or outdoor mounting, and ‘P’ stands for propane, which is the fuel used.

Does it Require Electricity?

Yes, the product requires electricity to power the temperature control unit as well as the electronic ignition system.


Rinnai V65eP is a compact tankless water heater that provides a flow rate of 6.5 gallons per minute. It has various advanced in-built features that make it user-friendly and safe to operate.

With careful maintenance, it can last very long and work optimally throughout its lifetime. Since it is an outdoor unit, there are no major venting changes necessary for installation.

All these features of the product make it ideal for use in small residences and mobile homes.


Last update on 2022-10-02 / Affiliate links / Images from Amazon Product Advertising API

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