HDT’s Nordic Air® MBH 4000 Crane Cab Heater is a portable 240 Volt DC heater designed for use on overhead crane cabs where 240 Volt DC is the only available power supply. The MBH 4000 delivers 4000 watts of heat and utilizes a true mill-duty DC-rated contactor, TENV DC fan motor, and adjustable thermostat. An optional mounting bracket kit is also available for securing the heater to the cab floor or ceiling, tilting it in the up or down position, right where you need it.