Martin 2010: you say watch the pressure drop. I suppose this is the same thing as saying be sure the static pressure is not too high? Since my static pressure is now .7, I plan to remove the Clean Effects and just rely on a MERV 13 Aprilaire 2010 5" media filter (I am now double-filtered with both).
How low should the static pressure be in your opinion? I was told that the installer aimed for .2 or .3 and felt good about .4 and OK as long as it did not rise above .5 (of course he changed his tune after he found it was .7 and said this advanced system was designed to run as high as .9 with no ill effects. I suppose proper vent types, and correctly sized and installed ductwork also affect the static pressure.
note: my Trane system with the problem smell: XL16i (2 ton heat pump), 2-1/2 ton coil (oversized), and XV80i (60,000 btu gas furnace). My other Trane system (which I think probably also has the DSS problem but not as bad yet): XL16i (3 ton heat pump), 3 ton coil, XV80i (80,000 btu gas furnace).