The enzyme stuff is funny to me. DNAse, no purpose there. Why not RNAse too? People can't articulate why they even want a DNA degrading enzyme. Lipase to degrade lipids seems good, but then again, that is already the function of soap.

I knew a number of people whose home had central vacs but funny enough, none of them worked anymore. It was a sort of "what's that weird plug thing" conversation that lead to that somewhat underwhelming finding. I get the sense it is one of those things where if you want it fixed, you'd have to call a technician who will probably give you a quote you don't want to hear. Then you just forget about ever getting it fixed.