18x18x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 17.75) - 3 Pack w32h32 + Product Details Size -

+ Product Details Size - 24"w X 34"h is the size for the duct opening measurement only

Actual Filter Size – 15 3/4"w x 11 3/4" x 1"

actual front end outer dimensions are 25" Width X 25" Height

actual front end outer dimensions are approximately 30 5/8" width X 30 5/8" height

+ Product Details Size - 4"W X 4"H is (for duct opening measurement only)

18x18x1 MERV 2 Non Pleated Air Filter Replacement Filters (Actual Size 17.75 x 17.75) - 3 Pack w32h32 + Product Details Size -+ 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