10000 - 45000 BTU per hour For use with propane gas Hi-med-low regulator Three Tip-over safety shut-offs Operate one to three burners for multiple heat output combinations Soft Nose P.O.L. Mounts on 20 - 100 lb. propane cylinder Polished chrome reflectors All components replaceable No tool needed; handwheel installation Heat large areas comfortably with the Mr. Heater MH45T Triple Tank Top Propane Heater. Run one, two, or all three burners for heat at construction sites, campsites, outdoor jobs, in kennels or barns, loading docks, and many other large demand places. The three burner heater offers variable outputs from 10000 to 45,000 BTUs an hour. It also features 3 safety shutoffs, a high/medium/low regulator, and a soft nose POL fitting connector. Making it even more convenient for work jobs, the heater directly connects to a 20-lb or 100-lb. propane cylinders (not included). The heater will run for 10 hours on high setting on a 20-lb. cylinder. Designed for outside use only. Safety shutoff engages in case of flameout. Made in USA. Manufacturer model #: F242900. The Mr. Heater line of tank top propane heaters combine performance with the convenience of a tank top heater. Utilizing radiant heat for no heat loss in cold air, the Mr. Heater line reaches full output in seconds, needs no electricity, and has no annoying noisy blowers. Expect to use these heaters for a long time thanks to their quality construction and lack of moving parts.