### Question
How does IMPROVING ENERGY EFFICIENCY define single package vertical heat pump?


### Answer
Under *42 U.S.C. § 6311*, **single package vertical heat pump** is defined as:

> a single package vertical air conditioner that—


(A) uses reverse cycle refrigeration as its primary heat source

#### Citation:
  - *42 U.S.C. § 6311*
  - Heading: **CHAPTER 77-ENERGY CONSERVATION > SUBCHAPTER III-IMPROVING ENERGY EFFICIENCY > Part A&ndash;1-Certain Industrial Equipment**

