spray booth time again

[sturmbird]

decided to kinda take matters in hand and build a new spray booth. It will be roughly 30" wide and about 20" deep and about 20" tall. Now the plenum will end up being about 1200 cu. in. (more or less) Looks like I will either use one big fan or maybe two smaller ones to give a better evac of the painting area. My question evolves around what size fans to get if I go with two fans or what size to get if I go with one big one. Also does anybody here have the actual P/N's from somebody like Granger? I've tried to order fans from them in the past, but they always wanted part numbers.
gary

[sturmbird]

the reason I went that big was to cover all bases. I'll probably only do 1/32 single engined planes, but and most all my four engined stuff is 1/72 scale. A 27" wide one would do everything I'll ever need it for except some large boats, and even they wouldn't fit the 30" booth. I'll tackle that issue later as I have a plan for them.

I suppose I could simply use two 110cfm bathroom fans or even 140cfm fans. Ducting is the next issue, but with the typical 3" outlet I already know that a 4" duct doubles the flow. Cutting the wood is the easy part!
gary

[redleg12]

I built one that is about 24 x 24 x24. Installed a 125 cfm bathroom fan. Works well. Also use under counter hockey puck lights to light the booth inside. Also installed a small wire shelf system on one side to hold thinners and cleaning supplies.

Rounds Complete!!

[Deleted]

Huh , i'm building one tonight . You ask me you should go for as much exhaust cfm as is practical . If you can fit it in the space use it . Course you dont want your model sucked up in the exhaust so there has to be a limit .I'm using a double squirel cage that works of a common shaft i scavaged from an old over the stove top exhaust .

G' luck !

[sturmbird]

Dec 18, 2012 21:52:50 GMT -5 redleg12 said:

I built one that is about 24 x 24 x24. Installed a 125 cfm bathroom fan. Works well. Also use under counter hockey puck lights to light the booth inside. Also installed a small wire shelf system on one side to hold thinners and cleaning supplies.

Rounds Complete!!

Redleg,
did you build a plenum behind your filter? I can buy two 110cfm fans pretty cheap at Menards. Kinda wouldn't mind making it about 24" tall to give me room for a turntable. Keep these ideas flowing as I need them
gary

[redleg12]

The top is an open and the fan with its plenum box is bolted on top. I sealed around the fan using metallic duct tape. I use a furnace filer in front of the fan..

My spray booth is 8 cubic feet. At 125 cfm I am getting more than 15 air exchanges per minute. More than enough for most paints and solvents.

Rounds Complete!!