Maradyne High Performance Fans' The Heat 5000 Series universal heaters can be used on a heavy duty vehicle not equipped with heating or defrost capabilities. Features a compact design and out-of-sight mounting inside the cab. Made of a strong .22 gauge black-finish steel casing and includes a long-life motor and a durable tube/fin core design. Available in two voltage outputs. Comes complete with mounting studs and rear hose connections as well as mounting brackets for the fan control switch. Optional accessories include a Defrost Kit (No. MFA126) and a Louver Kit (No. MFA127).