Abstract: An electric air handling unit for a vehicle manufacturing facility includes an electric heating coil assembly including at least one electric heating coil, an electric heating control panel configured to receive electrical power from a power distribution panel of the air handling unit and supply the electrical power to the electric heating coil assembly, and a first disconnect switch coupled between the power distribution panel and the electric heating control panel. The first disconnect switch is located external to a housing of the electric heating control panel, and the first disconnect switch is configured to selectively enable flow of the electrical power from the power distribution panel to the electric heating control panel and electrically isolate the electric heating control panel from the electric heating control panel.

Abstract: An improved wall structure for HVAC enclosures utilizing thermoplastic standoffs to form an air space and to separate the exterior wall structure of the enclosure from the interior wall structure. The position of the thermoplastic standoffs and the selection of the design for the standoffs insure that metallic fasteners would secure the exterior walls of the enclosure to the enclosure do not transmit thermal energy from the external wall to the internal wall.