Here in Tennessee, in my garage shop, my face shield fogs up immediately.
A PAPR with good airflow will take care of that right off the batt. That is one of the reasons I like a full head PAPR setup. I often even get fogging in my glasses when air escapes around my nose from the half-face mask. Happens when I exhale a bit more than normal.
A good PAPR will blow air from the bottom rim of the face mask, up over the mask, it goes out the back behind the head. This not only prevents fogging, but you get nice clean, rich, oxygenated air at all times (which is quite different than a half-face mask, where you end up with some excess CO2 from your exhaust, as well as have to suck in air with goes through the filters, and overall its less than optimal oxygen levels.)
I picked up a Sundstrom SR500/580 system myself. It was pretty expensive, though, around $1300 or so when I bought it (not sure if it is still the same price, I bought mine at a bad time in 2020). I think they may be cheaper these days. Its different from the more popular...I think its Trend Airshield, where the whole system is enclosed in the helmet. The Sundstrom has two key parts, the headpiece and a belt. The belt is where the power is, where two round cartridge filters go, and it connects to the headpiece via a hose. The head shield then clamps around your head like a lot of simple face shields. The hose connects at the top back of the headpiece, and the air flows down the rim of the face shield, and is blown right up the face shield. Instantly takes care of fogging, and I personally just love having the clean, fresh air from the airflow all the time.
Oh, the sundstrom face shield is kind of two layered. It has a thin layer on the front, so that if something goes flying off and just scrapes the shield, you can just replace this thin film and not the whole face shield panel. If something hits hard enough to break the panel, the you can replace that too. The air filters are dual, both used at the same time. You can use just particulate filters (purple) or get one of two different kinds of organic vapor filters (yellow). I've had some trouble sourcing the particular org vapor filter I want...it lists formaldehyde as a vapor that it will filter out. This matters to me as formaldehyde is one of the chemicals produced by CA off gassing. If I do anything with CA, I usually switch to my 3M half face mask with the mustard+pink filters, as they DO filter out CA fumes. Otherwise, the Sundstrom is quite nice.
One downside I've run into with the sundstrom, is it seems to clamp down onto your head in such a way...well, it seems to require being clamped fairly tight? This seems to cause me headaches some of the time. Which is really a bummer, as they can get fairly bad. This may just be something with me, too, I don't care for pressures on my scalp or head, and I've never even worn baseball caps really. So it may not be an issue for other people, but its definitely been an issue for me. I will often just use my 3M half face mask when turning smaller things as a result.
Disclaimer: I'm no agent for Sundstrom or anything like that. I have just been using mine for a few years now and its been really nice to turn with, especially bigger items that produce a lot of dust and chips.
www.mayoclinic.org
I almost built a proper dust collection system some years ago (in fact, back then may have been why I signed up, to ask questions about proper DC here), but I ended up not (not quite enough funds at the time for the entire thing.) I really quite regret not doing it now. Not only has ClearVue Cyclones closed their doors, and I was pretty dead set on one of their systems, the alternative options have become SIGNIFICANTLY more expensive than the cost I was looking at years ago. Which has just put it that much farther out of reach. If I had a proper DC, I don't think my shop would be as dust-infused as it is...but, these days, there is a coating (or many) over every surface. This, despite having and always running my overhead air filter all the time, too.
