Twelve-packs of MERV 4 rated filters made of fiberglass can be had for just a fraction of the price of other filters. However, these affordable filters need to be replaced each month.

Filters rated at MERV 4 can stop lint and dust, pollen, and debris caused from dust mites, but it is important to change them regularly to make sure they can keep your protected. Our 14 x 14 x 1" furnace filters are also available in washable filters. Washable filters can be a great option, but you have to make sure that you wash them regularly. The best way to know how often to wash your filters is to simply check them. With washable filters you need to check them more often than a standard filter.

The more expensive filters rated at MERV 13 are rated to filter bacteria and even tobacco smoke. Even if you can’t afford to rush out and buy the most expensive filters it makes sense to buy a new one with regularity in order to ensure that the air you and your family breathe is as clean and fresh as possible.