On Thu, 29 Nov 2007 14:21:34 -0800 (PST), wrote:

Can someone recommend a source for custom-size air filters for
residential HVAC?

I need 1"x25"x22" filters, and the closest sizes I've seen (at my
local WalMart, HomeDepot, Lowe's) were 1x25x25 and 1x25x20.

TIA

www.iaqsource.com has a filter finder. If they don't have a standard
the size you need (they don't have one your size) you can get a custom
in several types. Probably expensive, but....

HTH,

Paul