Mr. Heater High Intensity Radiant Natural Gas Garage Heater 40,000 BTU/Hr., MH40NG - Heater - Mr. Heater

Mr. Heater MH40NG - High-Intensity Radiant Natural Gas Heater 40,000 BTU/Hr.

Part number



Mr. Heater


  • $789.99
    Unit price per 



  • 40,000 BTU per hour
  • For use with natural gas on patios and in large, well-ventilated garages and workshops
  • Heats up to 1000 sq. ft. (outdoor use only)
  • For use in buildings with 12 to 15 ft ceilings
  • Efficient infrared heat that directly heats people and objects which in turn heats surrounding air to desired temperature
  • Includes adjustable thermostat for individually controlled warmth and all necessary brackets and hardware
  • No electricity required
  • Easy to install
  • No moving parts to service 
  • Quiet, clean, odour-free operation
  • Non-corrosive materials used throughout construction


99.9% Efficiency - that is what the Mr. Heater 40,000 BTU Natural Gas High-Intensity Radiant Heater offers. This heater gives you odour-free and quiet heat, and is a great option for keeping warm and toasty on the patio, or in large ventilated garages and other buildings with 12 to 15 ft ceilings

Utilizing a unique power pile thermocouple to control the valve, there is no electricity required. Just hook-up the included millivolt thermostat with the appropriate wire - not included - then mount the heater to the wall, make the gas connection, and you are ready to go. 



Show Download Tool No
BTU per Hour 40,000
Heating Area (Sq Ft) 1000
Tank Capacity (Min) 40# Propane Cylinder
Run Time (Hrs at Max BTU) No
Run Time (Hrs at Min BTU) No
Fuel Consumption/Burn Rate (Gal/Hr) No
Electricity Required No
Maximum Elevation (Ft) No
Weight (Lbs) 28.20
Model MH40NG
Oversized No
Length 35.50
Width 12.50
Height No
Disclaimer Do not use in sleeping quarters, mobile homes, or recreational vehicles. For elevations above 2,000ft ratings should be reduced at the rate of 4% for each 1,000ft above sea level or as specified by local authority having jurisdiction.
Use Patios, Loading Docks, large Garages, Automotive Repair Shops, Sporting Arenas, Public Entranceways
Warranty 1 Year Limited
Thermostat Yes
Safety Tip-Over Switch No
Fuel Type Natural Gas
Heat Type Radiant
Oxygen Depletion Sensor (ODS) No
High Limit Safety Shut-off (HLS) No
Indoor Safe No
Ignition Match Lit
Hose & Regulator Included No

Note About Service Parts Ordering
It is up to the customer to ensure that they are ordering the correct part number. For help obtaining part numbers please contact:

HeatStar: 1-866-447-2194
Enerco: 1-888-849-1899
Mr. Heater, Cleveland Iron Works, and BaseCamp: 1-800-251-0001