NSS Product Knowledge and Specifications 4

Question 1

What is the built-in buffer tank capacity in Navien NPE-A series units that support ComfortFlow technology?

Accepted Answer

0.56 gallons

Answer

The NPE-A series includes a 0.56-gallon internal buffer tank that stores pre-heated water to eliminate the cold water sandwich effect.

Question 2

What is the primary purpose of the ComfortFlow feature in Navien NPE-A series units?

Accepted Answer

Eliminating the cold water sandwich effect during intermittent draws

Answer

ComfortFlow uses an internal buffer tank and recirculation pump to eliminate the cold burst of water between hot water draws.

Question 3

Which NPE-A series feature allows the internal recirculation pump to activate based on a set schedule?

Accepted Answer

Timer-based recirculation mode

Answer

The NPE-A series supports timer-based recirculation mode, which activates the internal pump at user-programmed times to pre-heat the recirculation loop.

Question 4

What is the minimum flow rate required to activate the burner on Navien NPE series tankless water heaters?

Accepted Answer

0.50 GPM

Answer

NPE series units require a minimum flow rate of 0.50 GPM to activate the burner and begin heating water.

Question 5

What is the purpose of the secondary heat exchanger in Navien NPE condensing units?

Accepted Answer

Extracting additional heat from exhaust gases to warm incoming cold water

Answer

The secondary heat exchanger recovers latent heat from flue gases, preheating cold inlet water and producing condensate, which is the hallmark of condensing technology.

(NSS) Certified Navien Service Specialists Practice Test

(NSS) Certified Navien Service Specialists Practice Test

NSS Product Knowledge and Specifications 4