low budget make up air heater

[neveradullmoment]

I have a wood burner in my 16x24 garage. I am in process of getting my 1972 TR6 ready for paint. Wanted to shoot the epoxy and 2k primer this weekend but it is 22 degrees here. Since I don't want to blow up my garage had to rig up heater where the flame is outside and use a 10 feet of 8 inch duct to pipe it in. It worked really good and kept the garage toasty even with a exhaust fan running in window on opposite end of garage

 

[The Cobbler]

years ago a guy I knew had a body shop and home-made paint booth, with a heater outside in the shop ducted in to the booth. can't imagine that being code complaint now a days but it worked many years for him

 

[like2wheel]

I know a guy that paints cars almost daily with a similar set up in a 1 car garage. He only has about 2' of duct.

Not saying I recommend it but he's been doing it for 25 years that I know of.

 

[u3b3rg33k]

at least that way the level of CO exposure you get is constant instead of increasing % over time

probably wise to keep the exhaust fan on to balance the backpressure against that intake fan.

 

[climb.on]

I'll have to give this some thought. I'm a few days away from spraying about 20 gallons of lacquer and varnish. It sure would be nice to temper that cold air coming in.

 

[u3b3rg33k]

 

[neveradullmoment]

I had a nice old metal box fan on inside of the window pulling the heated air in. I was able to keep about a 4" gap between the propane heater and my 8" duct and that gap served to temper the incoming air and greatly increase the total volume of air. The indoor air quality was surprisingly good. Had a good amount of air exchange and stayed good even warm temp thoughout.