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Garage Gas Heater | Best Value Retrofit Heaters
Garage gas heaters are designed
to turn garages, workshops, and
utility buildings into comfortable
work and recreation areas.
Wall mounting allows a variety of
placement options and easy
access for routine maintenance.
Gas heaters for garages are
simple and inexpensive to install
using an existing natural gas line
or propane tank.
Also, vent free garage heaters
don't require additional venting or
duct work.
A 30,000 Btu model will heat up to 1,000 square feet, or a double garage. Battery
powered piezo ignition (think gas grill) used by most heaters eliminates the need for
electrical wiring. It also means when the power goes out, the heater won't.
The heat output is controlled by either a thermostat offering a wide range of heat
settings or a simple high/low switch.
Dual fuel models like the ProCom shown below offer the option to heat with natural gas
or propane.
There is some confusion as to whether or not vent free heaters are permitted in various
parts of the country. You can check the status of your state on this chart.

Installation and Safety Tips
- LP gas heaters require a minimum 100 lb tank to prevent fuel freeze-ups.
- A regulator is required between the tank and heater for LP gas models
- Field conversion of an LP unit to natural gas, or vice versa, is not permitted.
- To protect yourself from oxygen depletion, unvented heaters should be operated
in a well ventilated area and equipped with a carbon dioxide detector. These
devices sound an alarm when the oxygen level in the room drops below 18%.
- A carbon dioxide detector is not the same thing as a carbon monoxide detector.
- Depending on the model, vent free combustion heaters should not be used at
altitudes greater than 3,500 feet and never more than 5,000 feet.
- All combustion space heaters should be professionally installed, and inspected
every year just like any other furnace.