Reply by Todd A. Clippinger

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Posted on Jointer Advice for an Unheated Garage

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Todd A. Clippinger

8901 posts in 4578 days

#1 posted 03-14-2007 05:28 AM

Tim has one of the most important comments about the water vapor. All carbon based fuels, propane, natural gas, gasoline, kerosene, diesel fuel, create water vapor when the fuel is burned. The same thing happens when you run your car and you see water dripping out the tailpipe. In houses using natural gas and propane, etc. vapor stays warmed enough for the most part to vent outside. Sometimes you can see water streaks on the furnace exhaust pipe in the house, because the vapor recondensates in the pipe and runs back down into the house via the joints. I have been called to trouble shoot this on an occasion.

When you burn any heater in the garage without it being vented to the outside, this moisture will be released in that space and will condense on your cold tools. I went through the same situation here in MT in my shop (which is a dedicated shop) until I installed an overhead HotDawg heater that vents to the outside. I had to scrub the rust off of all my cast iron half a dozen times and then I decided that was enough.
The issue of cast iron warping on anything was never an issue. I know it can happen, but I believe that a more rapid transition in temperature must occur.

-- Todd A. Clippinger, Montana,

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