A utility or building code may specify that all electric auxiliary heaters used with a heat pump be staged on
and off by _____.
a. a setback thermostat
b. outdoor temperature
c. time of day
d. indoor temperature
Question 2
In selecting a heating or cooling system, undersizing is generally acceptable if it is undersized by no more
than _____.
a. 5 percent
b. 10 percent
c. 15 percent
d. 20 percent