Room air conditioner
Room air conditioner means a window-mounted or through-the-wall-mounted encased assembly, other than a packaged terminal air conditioner, that delivers cooled, conditioned air to an enclosed space, and is powered by single-phase electric current. It includes a source of refrigeration and may include additional means for ventilating and heating.
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 -