Navien NPE-210S2 is a gas tankless water heater from Navien rated 5.3 GPM at a 0.96 UEF — 176 therms/yr certified use, 180k BTU/h input.
Efficiency
Uniform Energy Factor (UEF)
0.96
Annual gas use (natural gas)
176 therms/yr
Annual propane use
192.35 gal/yr
General
Fuel
Natural Gas, Propane
Capacity
Max flow rate
5.3 GPM
Draw pattern
High
Minimum activation flow
1 GPM
Performance
Gas input rate
180 kBTU/h
Installation
Max current draw
5 A
Vent type
Power Direct Vent
Vent size
2
Smart features
Smart / connected capable
No
Dimensions
Height
27 in
Width
17 in
Depth
13 in
Certification
ENERGY STAR certified
Yes
Real flow rate by climate
A tankless heater's usable flow depends on how far it must raise incoming water
temperature. Sustained hot-water flow of the Navien NPE-210S2 at common temperature
rises (a typical shower uses about 2 GPM of mixed water):
Yes, the Navien NPE-210S2 holds a current ENERGY STAR certification for water heating efficiency (UEF 0.96).
How much does the Navien NPE-210S2 cost to run per year?
About $255 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What venting does the Navien NPE-210S2 use?
The Navien NPE-210S2 uses Power Direct Vent venting with 2 in vent connections. Matching the existing vent type is usually the cheapest replacement path.
Is the Navien NPE-210S2 a smart water heater?
No, the Navien NPE-210S2 is not connected-capable — it has no app connectivity or demand-response support.
