
Mr. Heater Portable Propane Radiant Heater MH18B
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The Mr. Heater Big Buddy MH18B is a portable propane radiant heater that delivers up to 18,000 BTU and heats spaces up to 450 square feet. It has three heat settings, a built-in fan to circulate warm air, and electronic ignition. The Life Safety System shuts the unit off on tip-over or low oxygen. It runs on two 1 lb cylinders or a 20 lb tank with a hose and filter, giving up to 96 hours on low with the larger tank. Owners praise its output and safety features but note it is bulky and the fan is noisy.
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Owners value the Big Buddy for its strong heat output and safety features, often using it in garages and campsites. Many mention the fan noise and the need for a hose and filter with a 20 lb tank. Some find it heavy and bulky.
Heater Big Buddy Midnight Pro Series MH18B is a portable propane radiant heater. It delivers up to 18,000 BTU of heat and warms spaces up to 450 sq. A built-in high-powered fan circulates warm air through the area.
It has electronic ignition and three heat settings. The Life Safety System includes tip-over and low-oxygen shutoff protection.
The heater runs on two 1 lb. propane cylinders. It can also connect to a larger 20 lb. tank for up to 96 hours of runtime on low.



