stewartingram Posted October 18, 2023 Share Posted October 18, 2023 As the title says. I did ask something similar (though not worded in the same way) some time back. Basically I've built a spray booth in my garage workhop/layout area, but I have yet to install an extractor fan. I'm led to believe that (and please excuse me if I don't use the correct technical terms) fans which have their motor in the airstream are a definite no-go area, as fumes could be ignited? Or is this a 'elf & safety' issue that is out of proportion? Otherwise a fan blade has to be installed in the extractor outlet, with the motor mounted outside of the airflow? What is available that is suitable, where can it be found, and at what price? Link to post Share on other sites More sharing options...
Hibelroad Posted October 18, 2023 Share Posted October 18, 2023 Try one of the main airbrush suppliers ( an internet search will throw up a few) you definitely need a dedicated unit otherwise there is a fire risk. Link to post Share on other sites More sharing options...
RMweb Gold Gilbert Posted October 18, 2023 RMweb Gold Share Posted October 18, 2023 1 hour ago, Hibelroad said: Try one of the main airbrush suppliers ( an internet search will throw up a few) you definitely need a dedicated unit otherwise there is a fire risk. True Even many commercially available booths have small print somewhere suggesting they are not suitable for solvent based paints...although as with anything its up to the individual modeller to weigh up their appetite for risk - both in terms of probability and impact. Chris H Link to post Share on other sites More sharing options...
RMweb Premium John Isherwood Posted October 18, 2023 RMweb Premium Share Posted October 18, 2023 35 minutes ago, Gilbert said: True Even many commercially available booths have small print somewhere suggesting they are not suitable for solvent based paints...although as with anything its up to the individual modeller to weigh up their appetite for risk - both in terms of probability and impact. Chris H I've been using a fan, intended for cooling a PC, for years. Note : I accept no responsibility for any adverse consequences experienced by anyone following my example. CJI. 1 Link to post Share on other sites More sharing options...
RMweb Gold Gilbert Posted October 18, 2023 RMweb Gold Share Posted October 18, 2023 6 minutes ago, cctransuk said: I accept no responsibility for any adverse consequences experienced by anyone following my example. A worthy message for life itself.... 1 Link to post Share on other sites More sharing options...
Ian Rathbone Posted October 18, 2023 Share Posted October 18, 2023 Modern brushless motors do not produce sparks so are safe to use with solvents. Go for the biggest extractor that will fit - the higher the amps the better. Tiny fans are not sufficient. Make sure the booth does not cut off the light - you need to see the paint as it lands. Ian R 1 2 Link to post Share on other sites More sharing options...
RMweb Premium John Isherwood Posted October 19, 2023 RMweb Premium Share Posted October 19, 2023 12 hours ago, Ian Rathbone said: Modern brushless motors do not produce sparks so are safe to use with solvents. Go for the biggest extractor that will fit - the higher the amps the better. Tiny fans are not sufficient. Make sure the booth does not cut off the light - you need to see the paint as it lands. Ian R My DIY booth has a strip light in the roof - protected by a sheet of renewable clear polycarbonate. CJI. 1 Link to post Share on other sites More sharing options...
stewartingram Posted October 19, 2023 Author Share Posted October 19, 2023 Ok, good tip about the 'brushless' motor; where do I find one? Are these the PC type? I have stripped a fair few PCs over the years. I like the use of the clear cover over an internal light too. I am going to fid an led strip in there. Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted October 19, 2023 RMweb Gold Share Posted October 19, 2023 12 minutes ago, stewartingram said: Ok, good tip about the 'brushless' motor; where do I find one? Are these the PC type? I have stripped a fair few PCs over the years. I like the use of the clear cover over an internal light too. I am going to fid an led strip in there. I bought a folding spray both with lights a few years back I seem to remember it being quite cheap as I had gathered parts to build one including a filter from a mk3 coach aircon system Beauty of is it folds away when not being us3d Link to post Share on other sites More sharing options...
RMweb Gold Gilbert Posted October 19, 2023 RMweb Gold Share Posted October 19, 2023 10 minutes ago, russ p said: I bought a folding spray both with lights a few years back I seem to remember it being quite cheap as I had gathered parts to build one including a filter from a mk3 coach aircon system Beauty of is it folds away when not being us3d is it solvent friendly? I'd be interested to know. Chris H Link to post Share on other sites More sharing options...
RMweb Gold russ p Posted October 19, 2023 RMweb Gold Share Posted October 19, 2023 14 minutes ago, Gilbert said: is it solvent friendly? I'd be interested to know. Chris H I haven't read anything with it to say it isn't. I've used railmatch aerosols and it was fine Link to post Share on other sites More sharing options...
RMweb Gold Gilbert Posted October 19, 2023 RMweb Gold Share Posted October 19, 2023 3 minutes ago, russ p said: I haven't read anything with it to say it isn't. I've used railmatch aerosols and it was fine Its a matter for the individual modeller - I am a weatherer and my paint volumes are very low so I hope risk is also low... Chris H 1 Link to post Share on other sites More sharing options...
RMweb Premium melmerby Posted October 19, 2023 RMweb Premium Share Posted October 19, 2023 Can't see any reason for a spray booth to contain a brushed motor these days. The Brushless DC motors are cheap as chips as they are made for the computer industry in vast numbers. You can get sizes from about 40mm to 150mm or bigger. 1 Link to post Share on other sites More sharing options...
walrus Posted October 20, 2023 Share Posted October 20, 2023 I use one of those bathroom extractor fans. This stopped working as a bathroom fan because the run-on timer electronics failed. Removing the timer circuitry and wiring the motor directly has allowed it to be repurposed. A related question - any thoughts about suitable filter material (I use cooker hood stuff)? Link to post Share on other sites More sharing options...
RMweb Premium melmerby Posted October 20, 2023 RMweb Premium Share Posted October 20, 2023 6 hours ago, walrus said: bathroom fan That's likely to be an AC induction motor (again no brushes) Link to post Share on other sites More sharing options...
heavymetalwagons Posted November 15, 2023 Share Posted November 15, 2023 I too just use a "bathroom" type fan, but i put a piece of speaker foam between it and the box .I suppose anything wound ie old t-shirt etc 1 Link to post Share on other sites More sharing options...
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