In the linked thread, Langmuir responded to someone with the recommended water level (3/4" below top of slats):
Water level in table - how much? - CrossFire ® PRO / General Discussion - Langmuir Systems Forum
make sure you at least wear a proper mask for the black dust…
at minimum this is what you should wear…
this is a better choice
I even have a HRV air exchange system in my garage as well as a local circulation filtration system…
you can not be safe enough when burning metal
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I wear that first low profile face mask you showed underneath my face shield. Replacement filters are pricey but but I’ve been able to buy some 10 packs for a half decent price.
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I wear the 3M one you posted. I stick with it because it’s the only one I have been test fit and smoke tested for.
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@72Pony I have a 3m like that but am wondering what cartridge number do you buy for this type application?
Generally, the ones sold at the Lowes/Home Depot type locations are equipped for organics, like paint and pesticides.
I don’t remember off the top of my head. Not the ones they came with I’ll have to look at them and get back to you.
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rusty or dirty metal is where you get most of your smoke on top
only tested
I have been using the 2091 (P100) but the 2297 may be a better choice.
Here is what 3M has to say
https://multimedia.3m.com/mws/media/474371O/respiratory-protection-basics-for-welders-10-2007.pdf
This is their welding specific brochure.
https://multimedia.3m.com/mws/media/1028293O/respirators-for-welding-brochure-70-0716-7146-8.pdf
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Very similar to my setup . I run a faceshield w an adflo and a halfmask
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