18x18x4 MERV 8 Honeywell Return Filter

Description

18x18x4 MERV 8 Honeywell Return Filter
Accumulairreg; grill filter. Nominal size 18 x 18 x 4 (Actual size 17 3/4 x 17 3/4 x 3 3/4) 98% efficient filtration media capturing particles as small as 0.3 microns before they can collect on your coils. High-efficiency alternative to one-inch filters. Larger media capacity allows for greater dust-holding ability. No assembly required. Easily inserts into and out of existing return grille. Allow a 7 depth behind grille to provide space for the deeper filter and air flow through filter.