18x30x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 29.75) - 3 Pack Height_10in Actual dimensions: 11

Actual dimensions: 11

+ Product Details Size & Compatibility – The size of galvanized sheet metal oval stack head with collar is 10" X 6" - 7" and it is compatible with Duct 7"

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+ Product Details Size – 22" x 36" or 36" x 22" is the size for the duct opening measurement only

18x30x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 29.75) - 3 Pack Height_10in Actual dimensions: 11+ Product Details 18" x 30" x 1" replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17. 75" x 29. 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