E-Z Flow Heavy Duty Air Filter, MERV 4, 18 x 20 x 1-Inch, 12-Pack
Brand: Flanders
Pack of 12 disposable UL Class II rated air filters designed for protection of furnace and central air units
MERV 4 rating: Removes household dust, pollen, and lint
Continuous chipboard design guards against corner separation while the double-sided metal media retainer adds to the filter strength
Each filter maintains efficiency for up to 30 days
Compatible with HVAC systems requiring filters sized 18" x 20" x 1"