Mr. Heater Big Maxx 300,000 BTU Natural Gas Power Vented Unit Heater

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US$794.40
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US$794.40
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Free shipping Free 30-day returns

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Management number 254552123 Release Date 2026/11/07 List Price US$794.40 Model Number 254552123
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The Mr. Heater® 300,000 Power Vented Unit Heater provides big heat for big spaces. With 300,000 BTU of heat, the heater spreads warmth through factories or warehouses up to 10,000 square feet. A fan pulls air from the room to be heated, and the power vent system pumps exhaust out of the building through a single vent pipe. The design minimizes labor and makes for easy installation. Air louvers with three locking positions control the direction of the heat. Work in warmth with the Mr. Heater® 300,000 Power Vented Unit Heater.

  • Provides 300,000 BTU heat output
  • Heats up to 10,000 sq ft
  • Performs at 82% thermal efficiency
  • Ships equipped for natural gas (LP conversion kit sold separately)
  • Air louvers with three locking positions to change direction of heat
  • Easily installs using 3/8 in - 16 tpi threaded rods (sold separately)
Fuel type Natural Gas
Space heater type Forced Air Heaters
Power type Gas
Maximum room size 10000 sq ft
Rec. use Indoor
Brand Mr. Heater
Rec location Indoor
Btu 300000
Has nrtl listing certification N
Color Gray
Accessories LP conversion kit
Height 31.5 in
Weight 216 lb
Volts 120 Volts
Model F263065
Count 1

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