Thanks for the website, as we've been looking and trying to make the best decision on the filters. We originally wanted to get the whole house filter hooked up to the air conditioners, but we don't have the room for the duct work in our attic

you may want to try an AllergyZone filter at www.allergyzone.com

we are trying the MERV8, but are looking for a better washable permanent filter. They will be expensive because we need 3 sizes, as we have central airconditioning in our 2 story house with 3 vents. The sizes are 12x24,16x25 and 20x25.