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Ventless Spray Booth12/29
I have been thinking about the idea of installing a second spray booth. It would be a small size of 24" wide by 24" deep. This booth would only be used for water-based pre-cat lacquer.
Does this need to be vented outside? There are no VOC's and we would have filters to capture the extra material.
Looking for your thoughts and ideas.
Most WB lacquers contain between 200-300 grams of VOC's per litre (20-30%). The products with the lowest VOC content I have seen are Target's 2000 & 8000 (between 20-60 grams if I remember correctly)...I would absolutely vent to the outside.
Yes vent. Maybe my opinion, but water based isn't healthy, it just has a different chemistry. 24" wide x 24" deep? What fits in that?
I have recently received info about a ventless spray booth. It uses a carbon filter behind the 2 particulate filters to catch the VOC's. Made by SprayTech.
The plan would be to use it during the high volume season of 3 months to ease the volume through our main spray booth.
Rich, we make personalized step stools for children. The sizes range from 9x12 to 9x16.
As a production manager, I would not let anyone install a ventless system that's designed to spray waterborne unless we had really deep pockets for the carbon film you're talking about.
I've sprayed several major brand waterborne products and you can tell by the odor that you really shouldn't be breathing the fumes from it. They may not be explosive but they are definitely not good.
I have the wider version of the spraytech booth you are talking about (the 48")
It works fine, but one thing to realize is that it's mostly adsorption, not absorption.
That is, the filters just make the vocs stick to the filters, they don't eliminate the vocs overall.
So eventually the filters have tons of voc in them, which isn't that great either. It still smelled, etc.
FWIW: If you go this route, it's *much* cheaper to buy the carbon and pleated filters on amazon/etc than from spraytech. The exact same ones were less than half price. (i can give you the model numbers if you want).
As for the rest of the design:
It was a also bit annoying to assemble it.
Past all that, it has worked great for what i needed. I use it to spray solventborne with no issue.
Thank you for all your input.
What I will plan on is to make the small booth and set up a vent to the outside.
This unit will only be used for 3 - 4 months during our peak season. So I can vent it out a window insert.
Thanks for the help.
I recently have done what you are asking about. I made what I call an exhaust closet with furnace filters along the way. When I was spraying between 10 & 60 mins it did cut down on the 'fog' but as other people have pointed out it stinks and the carbon filter on the respirator did not fully protect me. I was trying to not lose heat. I will research the carbon filters, but realize now I will have to vent outside.