Best Noritz Water Heaters in 2025

4 Piece Tankless Water Heater Flush Kit. Helps maintain and extend the lifespan of your tankless water heater

Kit comes with 3.5 gallon bucket with lid, 1/6 HP Pump, and 2 Steel hoses. Just add 2-3 gallons of vinegar or your own descaling solution

Works with most all tankless water heaters such as Rinnai, Bosch, Noritz, Rheem, Takagi, Tempra, Navien, Ecosmart, Stiebel, Eccotemp, Atmor, Trutankless, Marey Power, and others.

On demand a continuous and unlimited supply of hot water

Sleek design saves space and no venting required, It also features two different temperature memory presets, making it easy to adjust for personalized needs.

Requires hard-wired 240 or 208-volt electric service, with a maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts

***Kit requires 2 gallons of white vinegar*** Not included. Some tankless manufacturers recommend using vinegar or another cleanser for flushing their equipment. Can also save money if you have vinegar at home already.

Helps maintain the performance and extend the life of your tankless hot water heater. Easy directions for DIY Homeowner use.

Includes 1/8 HP Utility Pump, 6 Ft Color Coded Hoses, 3.5 Gallon Bucket with EZ Open Lid & Instructions for using vinegar. Peel Off Lid is super flexible and much easier to remove than traditional paint bucket lids.

Endless hot water

Can be vented with Schedule 40 PVC Pipe and Fitting

High Efficiency

[No Wait for Hot Water] - Point of use 1.3 gallons mini tank water heater provides instant hot water where you need it with fast recovery, reducing standby loss. Thermal efficiency up to 99%

[Small Compact for Sink] - The hot water heater is compact designed for your sink with dimensions 11.42" x 11.42" x 9.65", can be wall or floor mounted under sink / counter, plug into a standard 120V outlet. Nominal current 12amps

[Adjustable Temperature] - Thermostat with 3 temperature level settings, range from 77°F to 140°F with high temperature limit protection, also a freeze mode to prevent tank from freezing

【INSTANT & SUFFICIENT HOT WATER】 With real powerful 18kW smart heating system, the tankless hot water heater electric ECO180B supplies sufficient instant and endless hot water of 120℉ or higher in seconds, no waiting for preheating nor terrible temp fluctuation during shower time any more and no worry of running out of it. Perfect companion for whole house use, including shower, sink faucets, dishwasher, washing machine, etc.

【SELF MODULATION INSTANT WATER HEATER】The electric on demand tankless hot water heater ECO180B adjusts exact power input based on current flowrate and temp setting. For example, less power will be consumed by the smart water heater when you reduce water flow, thus, you get ideal temperature instead of scalding hot, which ensures comfortable experience and excellent energy efficiency. Also, optimal energy efficiency of 98% saves considerable electric charge for you.

【CONVENIENT USE】The electric tankless water heater 18kW comes with digital display & touch control panel so temp setting is easy job. Best of all, useful information on the screen helps you get full understanding of the working status of the 240v water heater tankless, you needn’t go through hard lesson of temp setting. Now turn on the faucet and let the smart instant hot water heater do the rest.

Exceptional Cold Weather Resistance: Our insulated well tank covers are engineered to endure freezing temperatures as low as 5 degrees, providing reliable insulation throughout the winter season.

Uncompromising Durability: Crafted from durable materials, our insulated well tank cover is built to last. With industrial quality construction, the outdoor water well tank covers offer long-lasting performance, even in harsh conditions.

UV-Resistant and Weatherproof: Protect your water pressure tank from the damaging effects of sunlight and adverse weather conditions. Our water tank cover is UV-resistant, ensuring their resilience and reliability.

Endless hot water

Ideal for outdoor applications

High Efficiency

【Electric Water Heater on Demand】Applied with 6.5kW heating system, the instant water heater electric ECO65 supplies instant, sufficient and endless hot water of 110℉ or higher temp in seconds, no waiting for preheating nor terrible temp fluctuation, perfect companion for sink faucet. Time to get rid of those 110V "lukewarm" toys.

【Smart Self Modulation】The tankless water heater electric ECO65 adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the smart instant hot water heater when water flow is reduced, thus, you get still ideal temperature instead of scalding hot, comfortable experience for sure. Optimal energy efficiency of 98% saves considerable electric charge.

【Simple Tankless Water Heater】The electric tankless water heater ECO65 comes with digital display & touch control panel so temp setting is easy job, you needn’t go through hard lesson of getting full understanding of working status of the 240v water heater tankless. Now turn on the faucet and let the smart tankless hot water heater do the rest.

APPLICATION: Dimensions : 22.25" W x 48.75" H x 22.25" LPerfect size for a maintenance closet, access closet under the stairs, crawl space. Ideal for replacement projects.

DURABILITY: Two magnesium anode rods for extra tank protection. Dielectric heat trap. Heavy gauges steel tank for extra years of trouble-free service. Glass-lined steel tank to help prevent corrosion.

WARRANTY: 10-year tank and parts limited warranty

Endless hot water

Ideal for outdoor applications

High Efficiency

Consistent Hot Water: The under sink water heater only heats the water when you need it and no waiting to preheat, saving up to 50% in energy consumption. The temperature rise of 1.0 GPM is 50°F. Easy to get hot water between 85°F - 131°F in two seconds

Smart Adjustment: Easy to read the real-time temperature, according to the sink flow rate to adjust your temperature increase or decrease through a LED touch display

Safe Use: With a 304 food-grade stainless steel water tube design, you don't need to be concerned about scaling reducing the functional life span of the unit when you use hard water. At the same time, this small water heater is accompanied by more safety features: anti-leakage, waterproof, over-heating protection, dry combustion protection, troubleshooting self-test, etc

Endless hot water

Very high efficiency

Compact Space Saving Design

Endless hot water

Can be vented with Schedule 40 PVC Pipe and Fitting

High Efficiency

199,000 BTU

.05 GPM activation flow rate

Self-diagnostic onboard computer system

380,000 BTU

.07 GPM activation flow rate

4" category III stainless steel venting required

Endless hot water

Ideal for outdoor applications

High Efficiency

Package Dimensions: 25.4 L x 63.5H x42.545W(centimeters)

Package Weight : 22.226 kilograms

Country of Origin: China

Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes

Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 7.6 GPM (6 fixtures at once)

Smart, Durable Design: Water heater includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included); See REP199iN for model with included pump

Top mount water connections for easy tank replacement

Versatile applications as it can be installed direct vent (DV), single vent (sv), 2 inch flex vent (fsv) or outdoor (OD)

Min gas input: 18K BTU, max gas input: 199.9K BTU

Endless hot water

Ideal for outdoor applications

High Efficiency

Condensing technology - The most advanced Noritz unit, over 93 percent efficiency level!

Combi-system set-up - Open loop system functionality for both potable water heating and space heating combination system

Safety lock out - Default max. 120 degrees F (refer to owner's manual for higher temp)

Super efficient tankless condensing heater

199,900 BTU, .05 GPM activation flow rate

Self-diagnostic onboard computer system

Flow rates up to 11.1 GPM

Commercial grade heat exchanger, 25% thicker copper than competitive models

No Venting Required

Flow rates up to 13.2 GPM

Commercial grade heat exchangers

Wi Fi Capable

Top mount water connections for easy tank replacement

Versatile applications as it can be installed direct vent (DV), single vent (sv), 2 inch flex vent (fsv) or outdoor (OD)

Min gas input: 18K BTU, max gas input: 180K BTU

Industry leading 25 year heat exchanger warranty

Direct replacement for existing 75 gal tank water heater

Top Mount Water Connections for Easy Tank Replacement

'EZTR40' - Easy To Replace 40

Can be installed in the same time it takes to install a tank type water heater

Flow rates from 0.5 gpm up to 6.6 gpm