If you’re lucky enough to have a garage, you already know it can be used for more than keeping your car out of the snow. As Kent Jeffery explains in a Q&A post at GreenBuildingAdvisor, garages also are useful for car and equipment repairs, and for storing garden vegetables, cans of paint and anything else a spouse may not want in the house.
But in order for a garage to serve those purposes, the temperature has to be above freezing — and for much of the country that means a source of heat.
Jeffery is in the midst of a house construction project, but already is thinking ahead to what his heating options might be for the garage. He’d like to keep a temperature of 45°F with an occasional boost to 65°F while he’s working on a project.
The options he’s considering include a direct-vent natural gas heater, electric resistance heat, a ductless minisplit heat pump, an unvented natural gas heater, or a portable heater used only when he needs it.
Any suggestions? That’s the topic for this Q&A Spotlight.
The no-heat option
Writing from the Chicago area, GBA reader WD tells the tale of a neighbor who installed a fancy gas-fired furnace in his three-bay garage but then found he rarely uses it. Maybe that’s because an attached garage picks up enough residual heat from the house, as WD found in his own case.
His 1989 house is anything but superinsulated, so WD added some insulation to the access doors, put clear plastic over the windows, and added 2 inches of polyiso foam insulation to the moveable garage doors (not an easy task).
“The result was a garage that was noticeably warmer in cold weather and cooler in warm…
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