Performance ARI certified to Standard 440. Constructed in compliance with ANSI/UL 1995 Standard. Listed High efficiency coil - 3 row seamless copper tubes with aluminum fins. Manual air vent. 4 positions, 3 speed fan switch installed under hinged access door. Removable motor/blower assembly. Stamped grille. Cabinet is Rock Beige in color, powder polyester coated, oven baked and fiberglass lined for maximum thermal and acoustical insulation. Throwaway filter. High efficiency, 3 speed PSC motor(s) for 115V/60Hz/1PH with thermal overload protection.