Question

question 28
the air temperature at the supply plenum on a heat pump system, when the heat pump is operating in the heating mode, is typically
60°f to 75°f
70°f to 80°f
75°f to 85°f
85°f to 100°f
120°f to 140°f

Explanation:

When a heat - pump system is operating in heating mode, the air temperature at the supply plenum is typically in the range of 85°F to 100°F. This is based on standard heating system performance characteristics.

Answer:

D. 85°F to 100°F