Hi,
Any comments as to how good/bad washable/electrostatic furnace filters are? The local humane society has three furnaces which take 16x25x4" filters, and displosable ones aren't exactly cheap (particularly for a non-profit, and when the filter on one system needs changing every couple of weeks). Thinking of swapping over to washable ones to cut down on costs.
I've checked the furnace manuals and they say that washable filters are an option. Looking online there don't seem to be many negative comments about the washable type; most are based around air quality (disposable filters trapping smaller particles than washable ones will), but is this isn't for residential/office use maybe that's not an issue.
The downside seems to be that reusable filters in the size needed are difficult to find - I've actually only found one source via Amazon (and those are actually a 2" filter in a 4" frame, and there's no lifetime warranty on them like there is for some of the 1" filters from other vendors).
thanks
Jules