Lesson 3: Representing Information
4.5 (2 reviews)
A typical electric water heater has an efficiency of 95 percent and costs $250 a year to work at a unit cost of electricity of $0.08/kWh. A typical heat pump-powered water heater has a COP of 3.3 but costs about $800 more to install. Find how many years it will take for the heat pump water heater to pay for its cost differential from the energy it saves.