Airpura Industries RpHBCO Replacement HEPA Barrier Post Filter Cloth Compatible with the C600 T600

This does not work at all. My husband, unfortunately, smokes cigars in his office- not to my liking at all, but I love him so I tolerate the habit. I thought that for almost $1,000 that this would be effective, but it's not. I've paid hundreds for the replacement filters and over the course of the year I'd rate this as being as effective as a cheap $10 fan that you could buy at any cheap outlet store. I'll investigate to see if there's a warranty or guaranty of some kind. What an awful waste of money.