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Old 11-18-2012, 08:40 PM
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Join Date: Aug 2007
Location: Calgary
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If you're making dust in your garage, make a habit of blasting out your heater with compressed air frequently, this is the cause of many a garage fire. I used to have to go and clean out heaters at a truss plant a few times a year as part of their insurance requirements. Shops with lots of woodworking should have dust extraction systems. Having heaters that have their own combustion air piped in prevents igniting dust from the air in the burner/heat exchanger. The exterior of the heat exchanger however, still needs blowdowns.

In most shops where sawdust is an issue I recommend hot water unit heaters, as then there's no combustion taking place in the affected area to ignite anything in the first place. The boiler room would be sealed off from these airspaces.
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