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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2005 Posts: 86 'Bolter | | 'Bolter Joined: May 2005 Posts: 86 | Just some thoughts on air movement.
If you want a positive pressure booth you will need the fan pumping air into the booth. This is basically your air makeup unit in a professional spray booth.
You can size your fan CFM using this formula.
Width X Length X Height X 0.8= CFM
Dimensions are in feet
Place it low in your booth.
Round you fan size upwards to the next available size fan you can buy.
The other end of your booth will house non HEPA furnace filters (get the cheap ones) You can experiment with the number you will need.
You don't want a cloud of paint hanging around while you are spraying for various reasons.
Make sure your fan inlet air is dust free.
Hope this helps as a starting point!
Mike
1951 Chevy 1/2 ton w/ 1959 235
1971 Chevelle
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