at home small spray booths

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Forum topic by Lazy_K posted 03-08-2014 08:00 PM 889 views 0 times favorited 3 replies Add to Favorites Watch
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122 posts in 2215 days

03-08-2014 08:00 PM

Topic tags/keywords: resource question finish voc spray lacquer

Hi, Ok, sifting through old responses is not finding me what I want.
I know how to make a spray booth that vents to the outdoors etc etc. I have seen, somewhere, VOC filters about the size of furnace filters that you could put into an unvented spray booth for spraying volatiles in small rooms or cellars that did not cost a million dollars.
Does anyone here know where to get such VOC filters so I can finish projects for sale in my cellar and NOT kill my family?

-- Kai SaerPren

3 replies so far

View Kryptic's profile


294 posts in 1685 days

#1 posted 03-08-2014 11:13 PM

the exhaust air must exit outside,

otherwise, people can get sick or worse

lights and fans should be “spark” free

View Lazy_K's profile


122 posts in 2215 days

#2 posted 03-09-2014 04:16 PM

re: Kryptic: No and No.
Several vendors sell mini spray booths, even table top models for spray painting indoors with no vent.
They run the air thru a particulate filter for the solids and then thru an activated carbon screen to collect the VOC’s the air coming back into the room is frequently “cleaner” than the air going in. It is also usually arranged so that it blows a stream of air at or into the spray area to keep it moving.
Spark proof blower and lights (or not) then are a non-issue because the explosive volatiles never get near them.
However the price tag on the factory made setups is beyond me. and most of their vendors will not sell the filters or filtrates to persons who can’t show they have bought their system(s).
If I can’t find ready-made VOC filters I know where I can get a 55lb sack of activated carbon granules and set up my own.

-- Kai SaerPren

View JAAune's profile


1802 posts in 2341 days

#3 posted 03-09-2014 06:32 PM

It’s expensive but you can buy activated carbon filters from McMaster Carr. There are probably cheaper suppliers but activated carbon filters are pricy no matter how you get them.

However, the cost of filters will probably far exceed the cost of venting your heat out of the house. I doubt the carbon filters will last long when subjected to direct spray from large amounts of finish.

You should really look into water-based products or a VOC-free varnish like Le Tonkinois if you want to avoid the VOC issue. There are some decent ones available.

-- See my work at and

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