NSS Product Knowledge and Specifications 2

Question 1

What is the Uniform Energy Factor (UEF) rating for the Navien NPE-A series condensing tankless water heaters?

Accepted Answer

0.97

Answer

The Navien NPE-A series achieves a UEF of 0.97, making it one of the most efficient residential tankless water heaters available.

Question 2

What is the minimum modulating input BTU/hr for the Navien NPE series tankless water heaters?

Accepted Answer

19,500 BTU/hr

Answer

All NPE series units modulate down to a minimum of 19,500 BTU/hr, allowing precise output matching to demand.

Question 3

What is the maximum domestic hot water outlet temperature setting on NPE series tankless water heaters?

Accepted Answer

140°F

Answer

NPE series units have a maximum outlet temperature setting of 140°F, though 120°F is recommended to prevent scalding.

Question 4

What is the operating water pressure range for Navien NPE series tankless water heaters?

Accepted Answer

15–150 PSI

Answer

NPE series units require a minimum of 15 PSI and can handle a maximum static water pressure of 150 PSI.

Question 5

What electrical supply is required for Navien NPE series tankless water heaters?

Accepted Answer

120V AC, 60Hz, less than 2A

Answer

NPE series units require 120V AC, 60Hz with a current draw under 2 amps, requiring only a standard household circuit.

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