Contractor means a person (other than the manufacturer or distributor) who sells to and/or installs for an end user a central air conditioner subject to regional standards. The term end user means the entity that purchases or selects for purchase the central air conditioner. Some examples of typical end users are homeowners, building owners, building managers, and property developers.
10 CFR § 430.2
For purposes of this part, words shall be defined as provided for in section 321 of the Act and as follows -