Question

which of the following is not a defrost system for heat recovery ventilators?

• an electric duct heater
• recirculating the exhaust through the fresh air side
• running house air through the fresh air side
• shutting off the fresh air fan
• directing furnace air to the hrv

question 10
which statement about flow measuring stations on hrvs is false?

• there should be two flow measuring stations
• they should be at least twelve inches away from the balancing dampers
• they should be on the insulated ductwork
• they should be connected to gauges to balance the system
• there should be one on the fresh air side and one on the exhaust side

Explanation:

Answer:

(1) C. running house air through the fresh air side
(2) A. there should be two flow measuring stations