Abstract: An accessory heating device for a tractor and similar equipment includes a heater housing having a base, a rear wall with an opening therethrough, a pair of sidewalls, a front wall with an opening therethrough, a top with a hole therethrough, and a chamber therein. A filter member is insertable into the chamber through a slotted opening in one of the sidewalls. The rear wall of the heater housing is mounted onto a forward wall of a radiator housing of the tractor. A plurality of vane elements are disposed transversely across the opening in the front wall, wherein each vane element can be opened or closed to allow cool air into the chamber. An annularly shaped sleeve is affixed onto an upper surface of the top around the hole. One end of a flexible conduit is mounted onto the sleeve, wherein the other end of the conduit is joined in a fluid serial connection to an air register in the operator's compartment of the tractor.