US Patent 8186119 Thermal isolating housing structure

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.