18x18x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 17.75) - 3 Pack Hi-Lo Oval Stack Head Performance – High diffusion induction

Performance – High diffusion induction rates result in rapid temperature and velocity equalization of the mixed air mass well above the zone of occupancy

+ Product Details Size – 16"w X 16"h is the size for the duct opening measurement only

Actual Filter Size – 19 3/4"w x 39 3/4" x 1"

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How To Measure A Floor Register

18x18x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 17.75) - 3 Pack Hi-Lo Oval Stack Head Performance – High diffusion induction+ Product Details 18" x 18" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 17. 75") A unique combination of cotton & synthetic fibers gives you the most filtration and the least air resistance equals great air & easy airflow for your system. The non pleated design provides low airflow resistance while still effectively capturing dirt and particles such as standing dust, spray paint