Latest Asked Questions

Navien NR-210A is a tankless hotwater heater of a high quality with no problem of sudden spurts of cold water. Cold water spurts are prevented by building in a recirculating pump and a buffer tank. With the model you don't have to wait until hot water is available, what is more, you use less water and save more energy. As all the Navien NR tankless hot water heaters, Navien NR-210Ais associated with a remarkable thermal efficiency of 0.98. Such thermal efficiency rate guarantees almost no gas waste.

It goes without saying that the model earns Energy Star certification, enabling you to get 30% federal tax credit for installation, when you replace your conventional water heater with the model in question.  The state "cash for appliances" rebate is also there to help you.


Another Models:

After doing months of

After doing months of research, I found that the "market" leader or "top brand" is not always the best. For my use, the Navien NR-210A was the clear winner for: size, btu, EF, therms (gas), min GPM (zero) and warranty. In the 2 months of ownership (replacing a 17yr old A.O. Smith 40G tank), I have found that washer, dishwasher and shower, all used at the same time at 20degree(F) was perfect. 2 showers perfect. Bath and shower perfect.
Consumers need to do more research than going with Big Box stores and marketing fluff. See the energystar.gov link I provided (on my name), which is very helpful.

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Choose Units


Choose What You Want To Calculate



Water Heater Power
 kW
Water Flow (Per Minute)
 Gallons
See Table "Typical Flow Rates"
Incoming Water Temperature
 °F
Output Water Temperature
 °F

Fixture Type Gallons (Liters) Per Minute
Lavatory
0.5 (1.9)
Bathtub
2-4 (7.6-15.2)
Shower
1.5-3 (5.7-11.4)
Kitchen Sink
1-1.5 (3.8-5.7)
Pantry Sink
1.5-2.5 (5.7-9.5)
Laundry Sink
2.5-3 (9.5-11.4)
Dishwasher
1-3 (3.8-11.4)

Activity Gallons (Liters) Using
Clothes washing
32 (121)
Showering
20 (76)
Bathing
20 (76)
Automatic dishwashing
12 (45)
Preparing food
5 (19)
Hand dishwashing
4 (15)
Source : ACEEE

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