Why 21.5×23.25×1 Filters Cost More Than Standard Sizes
The price on a 21.5×23.25×1 air filter surprises people the first time they look it up. We hear it on service calls: after years of grabbing a standard size off the hardware store shelf, the number feels off. It isn’t. Custom-cut dimensions and MERV 13 filtration media create a cost structure that commodity filter sizes … Read more