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Monitor Gas Heaters
Direct Vent Propane Space Heaters / Natural Gas Space Heaters

Monitor Heaters use a sealed combustion system which prevents the main cause of inefficiency infiltration of other room gas heaters and gas space heaters. Because the Monitor Gas Heater uses outside air for combustion, no cold outside air is drawn into the house as cold drafts.
Model GF1800 Direct Vent Monitor Space Heaters - Propane or Natural Gas Model Monitor GF 1800
Monitor Model GF 1800 Choose the Monitor Direct Vent Heater for your needs.

Choice of fuel - Natural Gas (NG) or Propane (LP)
The GF1800 Monitor Heater delivers between 10,200 and 16,000 btu of heat per hour. The Monitor Heater can heat a room, open space or an entire house and is very efficient with a rating of about 83% - which is one of the highest energy efficiency rating you will find. The Monitor Heaters comes with a built-in 7 day - 28 function programmable thermostat.
Use the GF 1800 Monitor gas unit heater as your entire heating system or for room or space specific users such as - sun rooms, family rooms, bedrooms, etc. The GF1800 Monitor space heater can also be used in conjunction with other heating systems such as wood, radiant, hydronic baseboard or electric baseboard.

Monitor Heater is Easy to install, easy to use and reduces your heating bill!

Model GF3800 Direct Vent Monitor Heaters - Propane or Natural Gas Model Monitor GF 3800
Monitor Model GF3800 Choose the Monitor Direct Vent Wall Furnace Heater for your needs.

Choice of fuel - Natural Gas (NG) or Propane (LP)






Monitor Heater Model GF 3800 is shipped via Overland Truck.
Click here for more information and costs.
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The Monitor Heater - Model GF 3800 delivers up to 38,800 btu of heat per hour (input).
Like the Monitor GF 1800 - this gas heater can heat a room, open space or an entire house and is very efficient with a rating of about 83% - which is one of the highest efficiency rating you will find. Comes with a built-in 7 day - 28 function programmable thermostat.
Use this GF3800 Monitor Direct Vent Wall Furnace Heater as your entire heating system or for large open space heating such as great rooms, first floors, basements and other large spaces.

As with the Monitor GF1800, the Monitor GF3800 space heater can also be used in conjunction with other heating systems such as wood heat or radiant heat.

Both Monitor Heater GF 1800 and Monitor Heater GF 3800 space heaters provide:
  • Sealed combustion system that prevents drafts
  • 82% Efficient Gas Heaters
  • Thermostatically controlled
  • Full programmable with 7 Day - 28 time & temperature settings - Monitor GF 1800
  • Full programmable with 7 Day - 28 time & temperature settings - Monitor GF 3800
  • Auto Restart
  • Direct Vent Heating
  • Cool to the touch
  • Complete safety
  • Choose Propane or Natural Gas heaters
  • Quiet operation and no fumes or smell with a sealed combustion chamber
  • Outside venting of combustion gases so room air and fumes never mix
  • A low operating cost - up to four times less expensive than heating with electricity or wood


Monitor Heaters that are direct vent wall furnaces in either Propane (LP) or Natural Gas (NG) are the latest in a 16 year old line of unique heating appliances. Tens of thousands of Monitor Heaters are heating homes from Maine to California, Georgia to Alaska. Quality Monitor Space Heaters are the perfect choice for energy efficient space heating.