Workshop air filters ?

[brewdexta]

I've got source extraction for wood dust on all my machines, but I also have an Axminster air filter box. The source extraction isn't perfect, especially on the mitre saw, but it does capture most. I've got it dusted to a big chip extractor in the downstairs barn that cuts down on noise. I inserted a relay between the NVR switch and the motor so I can turn it on and off with my phone.

I also wear a powered air cap with filter, especially when using the big wadkin table saw, the face protection is handy if you get a kick back, plus you have filtered air.

I only use the air filter box if I'm going to be doing any finishing soon after machining. I usually just let it settle and get it later, much later when I clean the whole workshop.

I've got the old mechanical heat recovery ventilation unit from the house that I'm going to use for welding extraction, and generally to replace air in the workshop.

For angle grinding, I need to move that to the downstairs barn. I will still wear the powered air cap, but the dust won't be in the workshop.

 

[DanZac]

At source extraction for angle grinding. Really. Must be nice in dream land

As with every question regarding extraction we are now significantly off the OP's question which asked;

I am thinking about buying an air filter for the workshop. One of those through flow metal boxes that hang from the ceiling and has a fan and filters inside.

Does anyone have one, and are they effective for welding and grinding dust etc, or a waste of time?

As I'm sure this has now been answered, I won't drag the debate on any further other than to add that HSG258 provides the HSE guidance on dust control and extraction, so if anyone actually wants to know how to control and extract dusts and fumes properly, then that's probably the best place to start.

And on that note I'm off to my dream land.

https://books.hse.gov.uk/gempdf/hsg258.pdf

 

[Craig-S]

I boarded the underside f the garage joists with OSB and dumped a 100mm of insulation on top to keep it cosy and noise from escaping, cut an opening for a 300mm inline fan i bought for overspray and it vents into the roof space through a spray filter its like a woven mat, then i have another equal size vent with another filter for replacement air. the fan is on a speed controller so i can control it, but the downside is it sucks out the warm air and brings in cold air. grinding sparks hit a welding curtain to limit how far they go, then easily vacumed and the air and lighter particles get wooshed out (the fan is above the bench)

ideally id like to try the grinder dust shrouds but im not sure its a good idea as i think tht metal dust will wreak havoc on the vac hose etc.