Free 173 Best Homemade Tools eBook:  
HomemadeTools.net Members

User Tag List

Results 1 to 6 of 6

Thread: Advice on extraction fan

  1. #1
    Supporting Member thehomeengineer's Avatar
    Join Date
    Nov 2017
    Location
    Berkshire UK
    Posts
    555
    Thanks
    558
    Thanked 1,412 Times in 307 Posts
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    thehomeengineer's Tools

    Advice on extraction fan

    Hi All
    I would be very grateful for guidance and advice. I am wanting to put an extraction fan on my spray booth but they are very expensive even secondhand. So I was thinking of modifying a bouncy castle air blower which are cheap as chips and use this to remove fumes etc. The motor is external to the fan so there is no flammable fumes over the motor. So before I buy one I thought I would ask if anyone has done anything like this or am I missing something really obvious whyI should not do this? I canít find any information on line.
    I thank you all in advance for your time
    The Home Engineer

    Advertisements


  2. #2
    Supporting Member jdurand's Avatar
    Join Date
    May 2019
    Location
    Los Gatos, California, USA & Goryachy Klyuch, Krasnodar Krai, Russia
    Posts
    874
    Thanks
    75
    Thanked 507 Times in 275 Posts
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)

    jdurand's Tools

    Advertisements

    watch for brushed motors and flammable vapors

    Advertisements


  3. The Following User Says Thank You to jdurand For This Useful Post:

    thehomeengineer (04-09-2020)

  4. #3
    Supporting Member
    Join Date
    Nov 2017
    Posts
    78
    Thanks
    4
    Thanked 48 Times in 31 Posts
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Watch the craigslist free section for a range hood, bathroom fan, or over the stove microwave. All of those have sturdy blowers that would be good for the application. If you need one sooner, get a blower motor and impeller from an auto scrapyard and make a housing for it out of wood or foamboard.

  5. The Following User Says Thank You to Elizabeth Greene For This Useful Post:

    thehomeengineer (04-09-2020)

  6. #4
    Supporting Member Tonyg's Avatar
    Join Date
    Apr 2016
    Location
    Centurion, South Africa
    Posts
    86
    Thanks
    812
    Thanked 29 Times in 25 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Possibly make an angled venturi type system, thereby the paint and fumes do not pass through you air pump,

  7. The Following User Says Thank You to Tonyg For This Useful Post:

    thehomeengineer (04-09-2020)

  8. #5
    JoeH's Avatar
    Join Date
    Mar 2018
    Posts
    49
    Thanks
    32
    Thanked 21 Times in 18 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I would think that one of two things would work. One would be to find a "squirrel cage" centrifugal fan that you can power with an external induction motor. Something like dust extraction systems. The other would be to use an air pump (fan) to feed air into your exhaust pipe and suck the paint fumes out that way. I think if you search on venturi type systems you might find something. I'm curious to see what you come up with.

  9. The Following User Says Thank You to JoeH For This Useful Post:

    thehomeengineer (04-09-2020)

  10. #6
    Supporting Member Saltfever's Avatar
    Join Date
    Apr 2012
    Location
    NorCal
    Posts
    131
    Thanks
    143
    Thanked 61 Times in 35 Posts
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If you were to use a bounce fan a focus should be on good filters before the intake and something that is easily changeable or cleanable. I would think the centrifugal blades would get coated with paint debris rather quickly. Regardless where you put the motor it is an ignition source if the air fuel ratio is in the ballpark. Obviously it has to be isolated. Interesting thread . . . .


    Post your reply!
    Join 42,532 of us and get 500+ tool plans, tool eBooks, build guides, and much more.



    eBooks for Supporters

  11. The Following User Says Thank You to Saltfever For This Useful Post:

    thehomeengineer (04-12-2020)

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •