Introduction to Heat Pump Water Heater - Problem Set - Understand

Problem Set 2.1

1. What is the source of heat used by the HPWH to heat up the water inside the insulated tank?
2. What substance goes from liquid to gas, and back to liquid in order to transfer heat to the water in the storage tank?  

Problem Set 2.2

1. What characteristics of a households affect the amount of water they use?
2. What environmental conditions are needed for HPWH to operate effectively?

Problem Set 2.3

1. What are four different fuel types that can be used to power a water heater?
2. What information can be found on the yellow label of a water heater?
3. What determines a water heaters Energy Factor

Problem Set 2.4

1. What type of agencies have an interest in the widespread adoption of HWPHs, and thus offer incentives for their purchase?