low profile fime/dust mask

[BrokenBiker]

I'm not totally sure why, but I don't think that sort of fan is the most appropriate. Most use squirrel cage type but guess you'd gat away with a ducted axial one. Probably pressure characteristics through ducting. The ~12" diameter of a car fan seems a bit overkill for the diameter of a sensible sized duct though!

ive seen it done with car rad fans before...mount the fan in the roof above the work area, last few i saw had sheet metal funnels (for want of a better word) to bring the size down to something reasonable, then a piece of ducting bent over 180 degrees so it was pointing down to stop rain getting in. no idea how effective they were and they would likely need a speed controller, but it cant make things worse surely...my work bench in against the long wall, just inside the doors, so if i mounted a fan in the roof at the lowest point, with enough fan speed it should suck fumes away and up then out...

ive got a car sat waiting for scrap so cant hurt to whip the fan off, stick it on the bench and see how it does...start it up, run a stick rod say 12 inches away and see if it pulls the fumes off...i need to get the injectors, turbo, actuator and alternator off anyway

 

[Turbo]

And how are you powering the car fan?
Much easier to get a cooker extractor from someone replacing their kitchen.
You have a fan, ducting and hood ready to go.

 

[BrokenBiker]

And how are you powering the car fan?
Much easier to get a cooker extractor from someone replacing their kitchen.
You have a fan, ducting and hood ready to go.

i already have a 12V supply with speed controller, well i have 4 of them in varying states of being taken apart.

hadnt thought of a cooker hood although i dont think id have space for that even after ive raised the roof 150mm next week

 

[gaz1]

longest ive had a mask on is probably an hr then its been a smoke break and brew time

as goes for beards expect for some materials to get through as your not properly sealed due to the beard otherwise than that it works well enough

as goes for glasses i wear them all the time and that masks fits well without getting in the way of them and that includes under a welding mask as well

 

[BrokenBiker]

longest ive had a mask on is probably an hr then its been a smoke break and brew time

as goes for beards expect for some materials to get through as your not properly sealed due to the beard otherwise than that it works well enough

as goes for glasses i wear them all the time and that masks fits well without getting in the way of them and that includes under a welding mask as well

To be honest I am never welding for more than an hour at a time anyway, it's usually all box section or angle iron frames so do a section, then go outside to the chop saw and cut the bits for the next section etc...necer in any rush.

The beard isn't very long but it's still gotta be better with a mask than without

 

[charlysays]

Moldex compact semi disposable respirator works for me. Just fits behind the welding mask. Welded galv etc indoors with one and no issues.

 

[Kram]

An electric leaf blower would make a good although slightly noisy fan for extraction, most can be turned right down to be more suitable.

 

[Turbo]

3M 7502 with pancake filters fitted.

This is a genuine 3m mask but I've also got what is likely a fake 3m mask bought on aliexpress very cheaply and to be honest it is identical to the real thing in terms of build, quality and fit.
But I use it with genuine 3m filters, just in case.