Commercial DRIERITE is anhydrous calcium sulfate. It is of neutral pH, constant in volume, chemically inert except toward water, insoluble in organic liquids and refrigerants, non-disintegrating, non-wetting, non-toxic, non-corrosive, non-channeling, generally recognized as safe (GRAS) by the FDA, not regulated by OSHA, economical to use, and can be regenerated repeatedly for reuse. Uses include drying organic liquids, polyurethane reactants, gases and solids.
This stuff is cool. Dessicants like this caso4 or silica gel can be packed into a can connected to the hose. Moisture from the air exhaled and inhaled *only* will be absorbed by the dessicant in the can. If only now I can find out how much moisture I give out at night I can pack amount of dessicant accrodingly.
I guess this is just another crazy idea.