Glasfloss 20x20x4 MERV 11 AC Air Filters. 6 Pack. Depth: 3-3/4

por | jul 24, 2026

6 Pack of 20x20x4 MERV 11 Pleated 4″ Inch Air Filters for AC & Furnace by Glasfloss. Actual Size: 19-1/2 x 19-1/2 x 3-3/4 ● Filtration Rating: MERV 11. Comparable to 3M/Filtrete MPR rating 1000 to 1200, or FPR rating 7. ● Effectively reduces pollen, dust,...

Glasfloss ZL 20x20x4 MERV 10 (FPR 7) Pleated HVAC Air Filters. Case of 6

por | jul 24, 2026

Glasfloss ZL 20x20x4 MERV 10 (FPR 7) Pleated HVAC Air Filters. Case of 6 Exact Filter Size: 19-1/2 x 19-1/2 x 3-3/4 | Nominal Size: 20x20x4• Air Particles Filtered: Bacteria, Dust Mites, Dust, Lint, Mold Spores, Pet Dander, Pollen, Smog, Allergens, Cough & Sneeze...