### Question
How does the law define ground source heat pump?


### Answer
Under *42 U.S.C. § 16617*, **ground source heat pump** is defined as:

> an electric-powered system that uses the Earth's relatively constant temperature to provide heating, cooling, or hot water

#### Citation:
  - *42 U.S.C. § 16617*
  - Heading: **CHAPTER 150-NATIONAL AERONAUTICS AND SPACE PROGRAMS, 2005 > SUBCHAPTER I-GENERAL PRINCIPLES AND REPORTS**

