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Thread: Spray Room Exhaust Fan

  1. #1
    Join Date
    Feb 2008
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    Creative 3D WoodArt, Dongola IL
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    112

    Default Spray Room Exhaust Fan

    Hello All:

    I have a small (8'x24') spray finish room in my new shop building. There is a filtered air inlet from the main (workshop) part of the building.

    I'm looking for a small exhaust fan to vent fumes to the outside. Would prefer if it could fit between two studs on 24" centers, and have a louvered vent.

    Any ideas or suggestions? Definitely want something safe as I spray lacquer occasionally. This is for occasional use, not continuous commercial.

    Gerald Martin

  2. #2
    Join Date
    Jun 2005
    Location
    Waterford, MI
    Posts
    112

    Default

    Grainger sells them, however they might be cheaper if you can find it elsewhere. They have smaller ones in 12", 18" etc.

    Here is a link to 24" Grainger exhaust fan with shutter. Has fully enclosed motor which protects against explosions if you spray flammable products.

    http://www.grainger.com/Grainger/items/1HLB2

  3. #3
    Join Date
    Nov 2008
    Location
    , On
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    666

    Default

    If the fumes are flammable, then you have to watch out for fans that blow the exhaust over the running motor. Automotive spray booth fans have the motor encased on the outside of the fan housing and spin the fan with a belt that is also enclosed.

    It should also have non ferrous blades so if they get bent and scrape the side they don't cause sparks...


    P99

  4. #4
    Join Date
    Jun 2007
    Location
    Bedford Hills NY 10507
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    1,057

    Default

    If you spray flammable be sure to get an Explosion Proof Motor!!!
    DO not take chances.
    Any spark can create an explosion from the spray fumes,even if only used occasionally.
    It only takes on time.

    Erminio

  5. #5
    Join Date
    Nov 2008
    Location
    canton, ohio
    Posts
    409

    Default

    you can copy and paste this into your browser.
    in ebay looked for paint exhaust fan.
    you can put a motor on this if you can get it at reasonable price. check craigslist also.
    i always look for bargains because i do not have enough money for everything. but i do have a $4,000 bicycle so maybe i do not want to spend alot on exhaust. We bought a spray booth at auction fro $4,500. then had to put in fire suppression. had to run the tube out 6 ft from building for fire code. I could have got another good bicycle with all that money.


    http://cgi.ebay.com/Dayton-Tubeaxial...arms=72%3A1205|66%3A2|65%3A12|39%3A1|240%3A1318|301%3A1|293%3A1| 294%3A50#ebayphotohosting

  6. #6
    Join Date
    Nov 2007
    Location
    mcgrew woodwork, columbia south carolina
    Posts
    850

    Default

    after looking at the cfm range and price of the grainger, tools usa is a bit more expensive and this is a good bit more than i paid for some of these just 18 months ago,

    http://www.toolsusa.com/asp/item_detail.asp?T1=PBE+9MS+LSD1633XVA20&am p;GENB=&UID=

  7. #7
    Join Date
    Feb 2008
    Location
    Creative 3D WoodArt, Dongola IL
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    Default

    Thanks for the input, everyone...

    Grainger's fan looks alright but it is not rated as explosion proof, even though the motor is sealed...

    http://www.industrialfansdirect.com/LFI-AX18-4.html

    will I need to spend $700 to get something functional and safe?

    Anyone?

    Gerald

  8. #8
    Join Date
    May 2006
    Location
    , South Daytona Florida
    Posts
    408

    Default

    Or you could put the room under positive pressure so the air is forced out through the filters.

    If the fan is across the room and not near where you are spraying, whether or not it is explosion-proof isn't very relevant. If a motor is brushless and has no contactors, there isn't going to be much of an opportunity for a spark to occur.

  9. #9
    Join Date
    Jun 2005
    Location
    Waterford, MI
    Posts
    112

    Default

    It is my understanding that a totally sealed motor is sufficient for use in spray booth. If the contents of spray booth is that explosive then gasketed and sealed fluorescent lights become a larger concern than the motor in the exhaust fan.

    -Fred

  10. #10
    Join Date
    Dec 2008
    Location
    , Lambertville Michigan
    Posts
    15

    Default

    look at ebay, and search "Multifan" there is a 20inch currently for sale. I'm using the 18" version and it works well, sealed motor, plastic blades, fiberglass shroud, lots of air movement, and rather quite. You can also get a speed controller. Grainger has specs and sells unit for more than 2x.s the buy it now price

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