Water-operated, 16,000 BTU unit is direct-fit to the machine and hidden from sight to prevent taking up cab space. UPI Cab Heaters include a heater hose, hose splicers, hose clamps, mounting bolts, fully adjustable defrost louvers, ductwork, rocker switch and all wiring necessary to install. Custom switch fits into factory dash holes. Three-year manufacturer's warranty. Made in USA. Inferno Heater