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SpecMr. Heater Big Maxx MHU80 80,000 BTU Unit HeaterHeatstar 18,000 BTU Vent-Free Radiant Propane Heater with Thermostat and Blower
PhotoMr. Heater Big Maxx MHU80 80,000 BTU Unit HeaterHeatstar 18,000 BTU Vent-Free Radiant Propane Heater with Thermostat and Blower
Our scoreNot reviewed yetNot reviewed yet
Our takeThe MHU50 one size up for a large or leaky building: 64,000 BTU/h output. In an insulated two- or three-car garage it's more than you need and cycles.A fixed vent-free heater that adds the thermostat and blower the Big Buddy lacks, for a cabin you heat all winter. It's an installed heater, so its own manual sets the fuel supply, room size and venting rules.
TypeVented gas unit heaterVent-free propane
Max heat output64,000 BTU/h18,000 BTU/h
Fuel / powerNatural gas or propanePropane
Indoor use per manualVented; qualified installer; 8 ft above a garage floorn/a
ThermostatYesYes
Warranty3 yrn/a
Watch out forInstallation and service by a qualified installer, service agency or the gas supplier, per the manual.We haven't read this heater's manual; check its room-size and ventilation limits before you buy. Never run an unvented fuel-burning heater in a room where people sleep (CPSC). The low-oxygen shutoff does not detect carbon monoxide; run a battery CO alarm listed to UL 2034 wherever the heater runs.
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