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heating a paint booth. propane heater? anyone use one?
#164341
12/08/08 04:45 PM
12/08/08 04:45 PM
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Joined: Aug 2006
Posts: 1,349
warfordsburg, PA
dirt
OP
pro stock
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OP
pro stock
Joined: Aug 2006
Posts: 1,349
warfordsburg, PA
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Re: heating a paint booth. propane heater? anyone use one?
[Re: dirt]
#164342
12/08/08 05:32 PM
12/08/08 05:32 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Step away from the open flame. You're looking at disaster.
Sheldon
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Re: heating a paint booth. propane heater? anyone use one?
[Re: dirt]
#164343
12/08/08 05:38 PM
12/08/08 05:38 PM
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Joined: Jan 2003
Posts: 942
Virginia, US
RTDaddy
super street
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super street
Joined: Jan 2003
Posts: 942
Virginia, US
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If the booth is in a building, try to set-up so the booth draws from the building, and heat the building. If you're looking at an open flame heat source directly into the booth,  , we may have a candidate for the first booth in low earth orbit. "IF YOU'RE UNDER CONTROL, YOU AIN'T GOING FAST ENOUGH."
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Re: heating a paint booth. propane heater? anyone use one?
#164344
12/08/08 05:43 PM
12/08/08 05:43 PM
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Joined: Jan 2008
Posts: 3,886
Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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Quote:
Step away from the open flame. You're looking at disaster.
Sheldon
people can die this way.
your paint will be giving off flamable fumes during the curing process.
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Re: heating a paint booth. propane heater? anyone use o
[Re: fox]
#164349
12/08/08 09:02 PM
12/08/08 09:02 PM
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Joined: May 2004
Posts: 1,377
Back In Iowa
belv2vert66
pro stock
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pro stock
Joined: May 2004
Posts: 1,377
Back In Iowa
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This is very interesting to me, Back in the day, I worked in very large cabinet manufacturing plants. We sprayed plenty of solvent based products including lacquers. Anyway we had huge conveyor systems that after the spray booth and flash off areas, there were huge ovens. I am talking like 40 x 100 feet. In these ovens there was a HUGE gas fired burner with like a 2 foot flame flying out of it. The burner would cycle on and off depending on the temp the thermostat was set at. There were/are several fans also in there circulating air and also exhausting fumes. Let me tell you, you could not go in this oven without being overcome with the fumes, to me it had to be flammable. I have never asked anyone, but I am assuming they were using the gas fired burner to produce positive pressure in the oven, so as long as the fumes never got to the flame, it would not blow up. I have always thought, If a guy used lets say a house furnace, and could make the fan run continuously and then introduce the flame, it would be the same principle. Obviously you would have to have filters to the outside and somewhere for the air/fumes to go out, like a traditional positive pressure booth, or the fumes would eventually back up to the flame. Obviously, the air the furnace used to burn, could not be exposed to the fumes. If the cold air came from the outside, it would only raise that air a certain temp. Could be trouble in sub zero type weather Someone smarter than me has to have an opinion on this but there has to be literally hundreds of these ovens in the US curing flammable coatings. LOL. I think this principle could work, just don't want to experiment with it.......
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Re: heating a paint booth. propane heater? anyone use one?
[Re: dirt]
#164351
12/08/08 09:46 PM
12/08/08 09:46 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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I have painted many a truck in a 30x40 area with a good exhaust fan in the wall. We have a 65K LP infra red heater hanging from the ceiling and use it all the time to dry paint after the fumes have cleared. Been doing it since 1984. Also have a smaller one mounted on a 100# tank on a 2 wheel dolly, use it for spot heating and paint drying.
Some spray booths use gas infer red heat to cure the clear after the fumes are cleared out.
So to answer your question, no it won't hurt the paint.
But you got to be careful in smaller inclosed areas with portable gas heat.I don't think I'd try any kind of heater with a blower around paint. Keep any open flame well up off the floor in any garage.
Last edited by Challenger 1; 12/08/08 10:10 PM.
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Re: heating a paint booth. propane heater? anyone use o
[Re: belv2vert66]
#164355
12/09/08 11:55 AM
12/09/08 11:55 AM
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Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
DPelletier
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
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Quote:
This is very interesting to me, Back in the day, I worked in very large cabinet manufacturing plants. We sprayed plenty of solvent based products including lacquers. Anyway we had huge conveyor systems that after the spray booth and flash off areas, there were huge ovens. I am talking like 40 x 100 feet. In these ovens there was a HUGE gas fired burner with like a 2 foot flame flying out of it. The burner would cycle on and off depending on the temp the thermostat was set at. There were/are several fans also in there circulating air and also exhausting fumes. Let me tell you, you could not go in this oven without being overcome with the fumes, to me it had to be flammable. I have never asked anyone, but I am assuming they were using the gas fired burner to produce positive pressure in the oven, so as long as the fumes never got to the flame, it would not blow up. I have always thought, If a guy used lets say a house furnace, and could make the fan run continuously and then introduce the flame, it would be the same principle. Obviously you would have to have filters to the outside and somewhere for the air/fumes to go out, like a traditional positive pressure booth, or the fumes would eventually back up to the flame. Obviously, the air the furnace used to burn, could not be exposed to the fumes. If the cold air came from the outside, it would only raise that air a certain temp. Could be trouble in sub zero type weather Someone smarter than me has to have an opinion on this but there has to be literally hundreds of these ovens in the US curing flammable coatings. LOL. I think this principle could work, just don't want to experiment with it.......
OK, You are right; a real paint booth setup uses a direct fired make-up air unit (usually natural gas)in conjunction with a dedicated and interlocked exhaust fan. As you've hypothesized, these units use 100% outdoor air. We've installed around a hundred of them over the years. There isn't an explosion hazard if the ventilation rate is sufficient; i.e. the flamable vapours are exhausted and the positive airflow is in the opposite direction. Contaminated air cannot get to the burners.
In this particular circumstance, I wouldn't recommend a direct fired heater.
Dave
1970 Super Bee 440 Six Pack
1974 'Cuda
2008 Ram 3500 Diesel
2006 Ram 3500 Diesel
2004.5 Ram 2500 Diesel
2003 Ram 3500 Diesel
2006 Durango Limited
[url] http://1970superbee.piczo.com [/url]
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Re: heating a paint booth. propane heater? anyone use o
[Re: DPelletier]
#164357
12/09/08 09:07 PM
12/09/08 09:07 PM
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Joined: May 2004
Posts: 1,377
Back In Iowa
belv2vert66
pro stock
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pro stock
Joined: May 2004
Posts: 1,377
Back In Iowa
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Quote:
Quote:
This is very interesting to me, Back in the day, I worked in very large cabinet manufacturing plants. We sprayed plenty of solvent based products including lacquers. Anyway we had huge conveyor systems that after the spray booth and flash off areas, there were huge ovens. I am talking like 40 x 100 feet. In these ovens there was a HUGE gas fired burner with like a 2 foot flame flying out of it. The burner would cycle on and off depending on the temp the thermostat was set at. There were/are several fans also in there circulating air and also exhausting fumes. Let me tell you, you could not go in this oven without being overcome with the fumes, to me it had to be flammable. I have never asked anyone, but I am assuming they were using the gas fired burner to produce positive pressure in the oven, so as long as the fumes never got to the flame, it would not blow up. I have always thought, If a guy used lets say a house furnace, and could make the fan run continuously and then introduce the flame, it would be the same principle. Obviously you would have to have filters to the outside and somewhere for the air/fumes to go out, like a traditional positive pressure booth, or the fumes would eventually back up to the flame. Obviously, the air the furnace used to burn, could not be exposed to the fumes. If the cold air came from the outside, it would only raise that air a certain temp. Could be trouble in sub zero type weather Someone smarter than me has to have an opinion on this but there has to be literally hundreds of these ovens in the US curing flammable coatings. LOL. I think this principle could work, just don't want to experiment with it.......
OK, You are right; a real paint booth setup uses a direct fired make-up air unit (usually natural gas)in conjunction with a dedicated and interlocked exhaust fan. As you've hypothesized, these units use 100% outdoor air. We've installed around a hundred of them over the years. There isn't an explosion hazard if the ventilation rate is sufficient; i.e. the flamable vapours are exhausted and the positive airflow is in the opposite direction. Contaminated air cannot get to the burners.
In this particular circumstance, I wouldn't recommend a direct fired heater.
Dave
So in theory, I could use a high efficiency gas fired furnace to build positive pressure in the room or booth. As long as the inlet air was clean. The key would be to make sure the contaminated air had an big enough outlet so that the fumes didn't back up. Again, I am pretty sure this would work, it's that proving part that is making me nervous.
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Re: heating a paint booth. propane heater? anyone use o
[Re: dirt]
#164359
12/09/08 10:43 PM
12/09/08 10:43 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
just finished my paint job. 3 coats paint, 2 coats clear with flake, 3 coats clear. top and bottom of car and i didnt blow up. also painted tail stripe.
so everyone can calm down now. 
Good job on not blowing up. 
How'd the paint job come out?
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