single package vertical air conditioner
(22) 2 Single package vertical air conditioner .— The term “single package vertical air conditioner” means air-cooled commercial package air conditioning and heating equipment that— (A) is factory-assembled as a single package that— (i) has major components that are arranged vertically; (ii) is an encased combination of cooling and optional heating components; and (iii) is intended for exterior mounting on, adjacent interior to, or through an outside wall; (B) is powered by a single- or 3-phase current; (C) may contain 1 or more separate indoor grilles, outdoor louvers, various ventilation options, indoor free air discharges, ductwork, well plenum, or sleeves; and (D) has heating components that may include electrical resistance, steam, hot water, or gas, but may not include reverse cycle refrigeration as a heating means.