Best Noritz Tankless Water Heaters 2021 Reviews

Heating water for use has evolved over the years. It is not until 1981 that we had the first tankless water heaters.

This is courtesy of Noritz, a company founded in 1951 and a leader in the water heating industry.

Tankless water heaters are high-quality and energy-efficient machines that every home would love to have. They are available as outdoor and indoor heaters.

10. Noritz –EZTR40-LP Tankless Water Heater

Noritz –EZTR40-LP Tankless Water Heater

This product is suitable for middle-sized families that require easy placement of the heaters.

It is a first-of-its-class product that allows one to exchange the 30/40 gallon tank type for tankless water heating technology.

The product has an isolation valve kit that allows the descaling of the product in specific situations.

It permits a water flow of up to 6.6 gallons per minute.


  • Has isolation kit for energy efficiency
  • Comes as a complete kit with enhancing features
  • Designed to convert gallon type tanks into tankless technology

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9. Noritz NR501-OD-LP Water heater

Noritz NR501 OD LP

This is an outdoor tankless water heater that weighs around 33 pounds. It is medium-sized, measuring 10.7 x17.6 x 26.6 inches.

This product has a water flow rate of 5 gallons per minute and is therefore highly efficient in hot water provision.

The water heater utilizes liquid propane gas in heating the water.


  • Highly efficient-turning out 5 gallons of water per minute.
  • Low NOx design
  • Best for outdoor use
  • Uninterrupted water flow

8. Noritz NR83-DV-LP Indoor Vent

Noritz NR83 DV LP

This is a reliable heater for use by small families. It has an 8.3 GPM efficiency and provides good services while multi-tasking.

The machine is not tied to outdoor use. One requires a properly ventilated house and can use it in the house.

It is quite small as compared to other types in the market. Other than its 2-pipe vent, it also utilizes polypropylene and CPVC.


  • The maximum flow rate of 8.3 GPM
  • Energy efficient
  • Propelled by propane that is 30 points more effective than normal petrol
  • Long coverage of up to 12 years
  • Temperature controlled

7. Noritz NR501-OD-NG 5.0 GPM Water Heater

Noritz NR501-OD-NG 5.0 GPM Water Heater

This is a reasonably priced heater that gives families the best options for water heating.

It is affordable for low-income homeowners and tenants. This product uses natural gas and gives good results.

Noritz NR 501 heater is appropriate for small homes and apartments but can only be installed outdoors.


  • Appropriate for outdoor use
  • Low nox outlook
  • Allows up to 5 gallons per minute

6. Noritz NR981-SV–NG 9.8 GPM Heater

Noritz NR981-SV–NG 9.8 GPM Heater

This heater uses natural gas but is appropriate for methane and propane gas.

It uses the venting system and turns out 9.8 GPM energy output. It measures 17 by 13 by 29 inches and weighs 54 pounds.

It can be used both indoors and outdoors and has the advantage of producing environment-friendly fumes.

A class 3 venting system works best with this product.


  • Low nox design
  • Has class three venting that ensures no fumes are produced
  • Used both indoors and outdoors
  • High water flow rate
  • Efficient energy production

5. Noritz NRC661-DV-LP Tankless water heater

Noritz NRC661 DV LP

This Noritz water heater product weighs 38 pounds. It is average in size, with product dimensions of 6.7 x 13.8 x 23.6 inches.

The NRC661-DV-LP water heater product uses indoor direct condensing, which makes it popular among many homeowners.

The product turns out 6.6 gallons of water per minute, proving to be highly efficient.

The NRC661-DV-LP utilizes natural gas or propane, further making it more appropriate for use in homes.


  • Built-in design that allows temperatures to rise to 140F
  • Efficient for use with natural gas
  • Turns out 6.6 gallons per minute hence highly efficient
  • Low NOx design
  • Can be vented to release the fumes produced while heating the water

4. Noritz EZTR40-NG Indoor Water Heater

Noritz EZTR40 NG

This is a first-of-its-kind Noritz product in the market. It uses natural gas to give a high-efficiency output regarding hot water production.

The product is available in the market as a complete kit and can be set up on gas lines of little size. It helps convert your 30-40 water tank into a tankless type.

The product dimensions of EZTR40 are 18.3 x27.2x 9.4 inches. It weighs 86 pounds and has a flow rate of 6.6 gallons per minute.


  • Long-lasting warranty-up to 12 years for the heat exchanger
  • Uses condensing technology hence highly effective
  • Comes with an isolation valve kit
  • Can use existing venting as a channel for propylene vent pipes

3. Noritz NRC661-DV-NG Water Heater

Noritz NRC661 DV NG

The Noritz NRC661-DV-NG is a good product for smaller homes. It can be set up anywhere around the compound and has 38 lbs.

The product measures 6.7 x 13.8 x 23.6 inches.


  • Can be vented with 40 PVC pipes
  • Used anywhere in the compound
  • Has a low NOx design

2. Noritz NRC98-DV-NG 9.8GPM Water Heater

Noritz NRC98-DV-NG 9.8GPM Water Heater

This is one of the best tankless water heaters on the market. It has the best water flow rate in the Noritz series and a distinct condensing system.

The product uses natural gas with a live flare. It is also compact and lightweight, weighing 65 pounds.

The product measures 9.4 x 18.3 x24.4 inches.


  • Highly durable
  • Best performance and efficiency
  • Can be used both outdoors and indoors

1. Noritz NR981-DVC-NG Water heater

Noritz NR981-DVC-NG Water heater

This is a hybrid Noritz water heater manufactured in the United States.

It weighs 58 pounds and measures 17 x 14.5 x29.5 inches. The Noritz NR981-DVC-NG is used indoors only.

It is highly efficient, producing up to 9.8 gallons per minute of hot water. This model uses natural gas to heat water.


  • Highly efficient-producing 9.8 gallons of water per minute
  • Has a low nox design
  • Uses concentric pipe that ensures high-quality air combustion
  • Stylish design