### Question
How does Certain Industrial Equipment define unfired hot water storage tank?


### Answer
Under *42 U.S.C. § 6311*, **unfired hot water storage tank** is defined as:

> a tank used to store water that is heated externally

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

