I have been using 20x20 filters since we built this house over 20 years ago and have always had a problem with them falling into the return duct space below the unit. Therefore I tried the 21x21 and not to my surprise, they dont fit. Anyone have suggestions?
Decided to shift my bulk filter buys to these guys and they did exactly what they committed to do. The only downside is that we are rural (very rural), and UPS handed the deliveries off to the USPS. As good as UPS is, the USPS isnt!
First time user and am very pleased with the product. The filters are a step above filters Ive used in the past at a lower price. User friendly web site with plenty of choices. Highly recommend.