Are there other products similar to the Airshield Pro that includes a full faceshield and filtered positive pressure air, suitable for bearded wood turners who cannot get a good seal with a standard rubber half facepiece respirator?

Though very pricey, the Airshield Pro will work with a beard as it uses a type of 'curtain', for lack of a better word, to wrap around the face.  Found one used for about half the price of new...good luck.

I use a system by North

air-filter / battery unit on a belt

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facechield part:

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and I have a beard (but not a ZZ-Top long beard).

These items have industrial quality and industrial price as well. The trick is to buy a second-hand unit with worn-out batteries (which cost an arm and a leg) then create an adapter for normal Li-MH batteries on that belt. That gives good protection for a more reasonable price.

It wears quite comfortable, not too much noise, not too much draft but enough that some coughing doesn't steam up the face shield.

Good to know!!