I need to work in my crawlspace for a few hours (sealing ducts, etc).
Due to dust, I use a goggle and a dust mask. However, after a few minutes
the goggle starts to fog up, my face gets hot and wet and I feel like I'm
running out of air. I tried different types of dust masks (with valves and
without) but they all gets hot and are hard to breath after a few minutes.
Inevitably, I had to remove the goggle and dust mask.
Is there an combination goggle/dust mask that is actively ventilated, i.e. a
battery powered fan that draws air, to prevent fogging and moisture
If you have plenty of money, you could try this one:
I've used something similar in respiratory isolation rooms and will tell you it
feels like you're being air conditioned. It's great for avoiding that closed
in, can't get your breath feeling. It's just expensive.
There are several others on the market. They all seem to run in the $200+
A supplied-air respirator? Probably be cheaper to hire the work out.
Goggles/mask that suck in local air would just slam the dust you are
trying to avoid, right into your eyes, or the filter would clog up in
Have you tried ventilating the crawlspace while you work? Something
similar to what Ma Bell uses for confined-space work in underground
vaults- a big portable fan and/or air scrubber with collapsible ducts
you run down into the work area? I imagine a rental place that caters
to industry rather than DIY would have them. I only have trouble with
goggles fogging up where there is no air circulation and/or high
humidity. (Like working under a car in summer, when it is muggy and
hot.) Of course, I also wear glasses, so that is an extra 2 surfaces
over each eye to fog up.
If an expensive rental is a little off-putting, try the poor man
solution- a box fan and some plastic on the access cubby, sucking OUT,
and some sort of air hole at the far end, for 24 hours or so. If you
don't have plastic over the dirt, sounds like you need it.
All of the ventilated solutions are going to cost you hundreds of dollars.
The ones that I know of are in the $200 range and are used for woodworking
and woodcarving. It sounds to me that for a couple hours work you might as
well hire a contractor or handyman outfit. That is, unless you would have
an ongoing need for a unit like this.
Perhaps the warm moist air you breath out is condensing on the inside surface
of the goggles. You might do better with a combined mask that doesn't allow
your outgoing breath to touch the inside of the goggles or separate goggles
and breathing filter. The goggles might have a filtered opening to allow
water vapor from your skin to escape, or they might be part of the incoming
airpath. Outgoing air might bypass the filter to avoid condensation there.
Its common for commercial interior paint spraying, call sherwin
williams or Harbor freight for cheap stuff, maybe a commercial paint
spray rental will rent equipment, a cheap swimmers goggle works,
maybe respirator filters are clogged.
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