4-Inch Furnace Filters

Every 4-inch furnace filter size Filterflow ships, in MERV 8 and MERV 11. Deep-pleated media filters for furnaces with a 4-inch cabinet, typically replaced every 6 to 12 months. Subscribe once — a year of filters, free FedEx shipping, and text reminders when it's time to swap.

Need a different depth? See 1-inch filters or 5-inch Honeywell-compatible filters.

Don't see your size? Contact us with the dimensions printed on your current filter's frame, and we'll check whether we can get it for you.

5 products