### Question
How is the term unit heater defined?


### Answer
The term **unit heater** is defined in *42 U.S.C. § 6291* as the following:

> a self-contained fan-type heater designed to be installed within the heated space

#### Citation:
  - *42 U.S.C. § 6291*
  - Heading: **CHAPTER 77-ENERGY CONSERVATION > SUBCHAPTER III-IMPROVING ENERGY EFFICIENCY > Part A-Energy Conservation Program for Consumer Products Other Than Automobiles**

