Introduction to Heat Pumps - Problem Set 2.1

1. Which of the following components are in both heat pumps and air conditioners?

1. Compressor
2. Indoor coil
3. Expansion valve
4. All of the above

2. Why do some heat pumps have auxiliary heat?

1. Auxiliary heat is more efficient
2. Heat pumps sometimes need assistance in very cold outdoor conditions or with a very large temperature difference between the current indoor temperature and the set point
3. Heat pumps are never installed with auxiliary heat
4. Electric, gas or oil-based auxiliary heat still works if there is a power outage