I was thinking about it too Mag, but after pricing the SP and total materials needed then the humidifier for my size closet, I'd be better off getting an Aristocrat unit the size of an endtable. Then I was thinking of just using the type of paint used in bathrooms (for the humidity), putting up a shelf or two, and getting the humi-unit for that size closet. The smokes are going to stay in their boxes anyway, so no need for SP lining the closet. Anyway, my current estimate is about $350 for the humi unit and less than a $100 for some decent shelving.