Noritz Gas Tankless Water Heater Reviews, Prices and Buying Guide 2021

Before you dive into the specific brand review, we highly recommend you to read our elaborate Tankless Water Heater Reviews and Guide of Tankless Water Heater Installation Cost in advance. There are several crucial steps you need to take before you even start to think about the brand.

This Noritz tankless water heater guide reviews all models including their efficiency, GPM flow rates and key features. All Noritz tankless models are gas-fired and can be installed for use with natural gas (NG) or propane (LP). The first table below shows all models and their specifications, while the second table has Noritz tankless water heater prices.

We’ve prepared guides for all major competitors to Noritz in the tankless gas water heaters market including:

These guides make it easy to research features and price comparisons for brands you’re considering.

Introduction to Noritz Tankless Water Heaters

Like many of the major brands, Noritz began in Japan where it still has global headquarters. The company opened US operations in 2002 and has a distribution facility in California. Most Noritz tankless water heaters are made outside the US.

This guide, and the following table, covers tankless models produced for residential or residential/commercial applications. Noritz categorizes these models as High Efficiency, Mid Efficiency and EZ Series.

Series/ModelMax. BTUUEFGPMCirculatingCondensingIndoor/
High Efficiency
Mid Efficiency
EZ Series

Important Note on GPM: This column represents the maximum gallons per minute flow rate the heater can produce. Maximum GPM flow is achievable only when the incoming water is quite warm. The colder the incoming water is, the longer it must be heated to reach the thermostat setting on the tankless water heater, so the lower the GPM flow rate will be. In tankless water heater specifications, you’ll see information such as “Flow rate @ 70°F temp rise is 4.3 GPM.” That’s from a unit with Max. GPM of 7.5 GPM and means that if the temperature of the incoming water must be raised by 70 degrees Fahrenheit to reach the thermostat setpoint, then only 4.3 gallons per minute of hot water can be expected. For more information on this important topic, see the related section in our Tankless Water Heater Buying Guide.

  • UEF: The Uniform Energy Factor is the new efficiency rating (as of 2017) for tankless water heaters. It represents the percentage of heat created by the burner that is effectively transferred into the water. To determine the effective BTUs, multiple Max. BTU by UEF. For example:

    199,000 BTU x .96 = 185,070 effective BTUs, and

    199,000 BTU x .81 = 161,190

    The difference of 15% can affect sizing a unit for your home. You need a larger unit when it is less efficient to create the same volume of hot water as a smaller, more efficient tankless water heater.

  • Energy Star: All High Efficiency and EZ Series Noritz water heaters meet Energy Star standards.
  • WiFi: No Noritz water heaters have built-in WiFi equipment. Most can be WiFi-enabled using an adapter and the Noritz app. Complete information is found on this page. The adapter cost is $140-$150 from various sellers.
  • NG/LP: Each model is available in natural gas and liquid propane versions. In the NR98 Mid Efficiency Series, propane units offer .88 (88%) efficiency while natural gas models are just 82% efficient. In the NR83 Series, the natural gas model is more efficient at 85% while the propane version is 82% efficient. In all other models, the efficiencies are the same for NG and LP.
  • Warranties: All Noritz tankless water heaters are backed by a 12-year heat exchanger warranty, 5-year general parts warranty and 1-year reasonable labor warranty.
  • EZ models: The EZ111 is also known as the EZTR75 in some literature; the EZ98 is also called the EZTR50.
  • Condensing vs. non-condensing: If you’re not familiar with the difference in these two types of water heaters, it is explained in this section of our Tankless Water Heater buying guide.

Noritz Water Heaters Features Analysis

NRCP Series models are equipped with STS 304 stainless steel heat exchangers.

NRC98 Series units have commercial-grade copper heat exchangers.

The EZ111 and EZ98 models have dual stainless steel heat exchangers. The secondary exchanger transfers heat from combustion exhaust gases into the incoming water to preheat it before it enters the primary heat exchanger. This creates higher energy efficiency and a higher GPM flow rate.

Burners are modulating, so the amount of heat they create automatically adjusts up or down depending on demand and the temperature of inlet water. Burners for most models have a minimum input of less than 20,000 BTUs. Most top brands feature modulating burners.

A Noritz remote controller is available from various sellers for $105-$125.

Noritz also makes commercial units and combination boilers that supply domestic hot water and water for radiant heating systems.

How Noritz Water Heaters Compare to Other Tankless Brands

Noritz demonstrates a commitment to quality materials more than most other brands. The dual stainless steel heat exchangers on the EZ models noted above is an example as are the modulating burners.

Like most of the brands we’ve reviewed, Noritz requires pro installation to stand behind its warranty. The brand keeps its units simple and more affordable; options like a remote control or WiFi are options. Noritz’s consumer ratings for most models are about right in the middle of all brands.

Noritz Tankless Heater Prices

This table has prices for all current Noritz water heaters. Installation costs and factors affecting cost are found below.

Noritz Models
Unit Cost Only
High Efficiency
Mid Efficiency
EZ Series

Noritz Tankless Water Heater Installation Cost

The cost ranges for these models reflect many different sellers, both local and online. Some online sellers offer “free” shipping, which raises the unit cost. Others charge for shipping separately, up to $75, so unit costs might be lower.

As for installation, gas water heaters cost $800-$1,500 to install, in most cases. The more of these factors your project has, the higher in this range your cost will be:

  • Removal and disposal of an old unit
  • Running a new gas line
  • Adding new water line
  • Indoor installation – venting required

There are potential safety risks such as gas leaks and carbon monoxide leaks that make professional installation a good practice. Noritz states, “our heaters should only be installed by a licensed professional. Warranty will be void if our units are not installed by a licensed installer.”

We can put you in touch with licensed professionals in your area. There is no cost or obligation for using our Free Local Quote service. You’ll receive written estimates from several of the top installers in your area – and they know they are competing for the work.

1 thought on “Noritz Gas Tankless Water Heater Reviews, Prices and Buying Guide 2021”

  1. Like most of the brands we’ve reviewed, Noritz requires pro installation to stand behind its warranty…..our heaters should only be installed by a licensed professional. Warranty will be void if our units are not installed by a licensed installer.” I read both of these in the same page regarding Noritz so I guess warranty is based on how they feel that day about covering you or not.


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