Equip your semi truck to be Ready for the Road Ahead , with the Red Dot 12V 150 CFM Auxiliary Heater Unit for HD Vehicles, a key device that quickly heats up vehicle cabins, cargo spaces, and more. Due to its compact design, this replacement heater is able to gently nestle into tight enclosures, while dispersing warm and dry heat. Fashioned with multi-position leg brackets to allow mounting in any position. FleetPride is your First Click in Heavy Duty .