Spray booth & New extension on the barn

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Forum topic by jigsawjohn posted 01-15-2011 12:34 AM 1233 views 0 times favorited 4 replies Add to Favorites Watch
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6 posts in 2683 days

01-15-2011 12:34 AM

Topic tags/keywords: spray gun

We are planing an extension to our barn, for the purpous of creating a spray booth for our furniture.
I have serious lung problems and wear O2 while I work. For this reason all of my finish work has to wait until spring and will be held in this barn unfinished till then.
Do any of you have any information on the filteration and blower requirements? or just ideas.
lungs,filtration,safty,finishing,spray gun.
I don’t understand the use of tags

4 replies so far

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6 posts in 2683 days

#1 posted 01-16-2011 03:45 AM

I woke up about 3:00 am thinking about this project and came up with some thoughts, so I designed a down draft floor and decuded to but a wood storage building about 8×10 and use the back 2 ft as my plentum chamber. By making the floor beams front to back of 2×10 and from side to side of 2×6 on 24” centers each way. Putting a torshion box design great to fill the space between would give me the down draft I am looking for.
I tried to add the drawings but it wont allow tif files. If someone knows how and is interested please let me know how.

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2600 posts in 2991 days

#2 posted 01-16-2011 04:16 AM

Talk to your local HVAC people.(Furnaces and Air conditioning) They have formulas for calculating air exchanges per area. Just cutting holes and putting fans in can cause problems if you haven’t calculated what you need. There is a smoke test that can be done after the fans are operating, it will tell you which way your air is really going and how fast.

-- "My mission in life - make everyone smile !"

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26 posts in 2824 days

#3 posted 01-16-2011 04:39 AM

Downdraft is nice but it is a lot of extra work. If you are using a true HVLP versus a compressed air conversion gun, you should not be putting out huge amounts of overspray. You can dial those guns in very well. I don’t know how big your pieces are but I doubt they are car size. In which case you can draw from the sides or even down low on the sides.

As mentioned in another post it will be really important to set it up so the flow is going how you expect it to. This means the fresh air comes in at a certain point and the extraction is balanced with it to create the proper flow to carry out airborne particles.

The much bigger issue / equipment consideration for someone with compromised respiratory is a fresh air respirator. You can almost work without a spray booth with this respirator, although I would do both. If you don’t have a fresh air respirator I would not buy another thing or paint a birdhouse without one. This is the only way to be sure you are not taking in VOC’s or anything else including sawdust. It creates positive pressure around your face with fresh filtered air so that there is no way to breathe contaminants.

Good luck.

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3 posts in 2671 days

#4 posted 01-27-2011 07:08 PM

Good morning,

If you are looking to build a spray booth, be sure to have proper filtration, airflow, lighting, etc. Since a spray booth is designed to provide an environment that is safe for workers and produces a clean, quality finish, a booth is ineffective and dangerous if it is not properly built.

A site that you may want to look it is the GFS Finishing Academy site. We just recently launched this site and there is a plethora of information about spray booths. The first section, in particular, goes over the safety and regulations, and design of a booth:

Note: This site is currently focused on the auto refinish market, but most of the same concepts apply for all industries and spray booths in general.

Hope that helps!

-- Melissa Fochs, Global Finishing Solutions,

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