### Question
What is the definition of appliance?


### Answer
The definition of **appliance** is as follows in *42 U.S.C. § 7671*:

> any device which contains and uses a class I or class II substance as a refrigerant and which is used for household or commercial purposes, including any air conditioner, refrigerator, chiller, or freezer

#### Citation:
  - *42 U.S.C. § 7671*
  - Heading: **SUBCHAPTER I-PROGRAMS AND ACTIVITIES > Subchapter Referred to in Other Sections**

