14" x 14" - 3-Way Extruded Aluminum Ceiling Diffuser Square - HVAC Vent Cover w32h32 Round-neck-to-square-face construction results in 360 4 X 12 Is CRFG2028 Width_14in

Round-neck-to-square-face construction results in 360 degree air diffusion pattern similar to a full round diffuser

Rust-Free Aluminum - Made from strong

Actual Filter Size – 17 3/4"w x 11 3/4" x 1"

Traditional HVAC systems were designed for cold air

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

14" x 14" 3 Way Extruded Aluminum Ceiling Diffuser Square HVAC Vent Cover w32h32 Round neck to square face construction results in 360 4 X 12 Is CRFG2028 Width_14in Round neck to square face construction results in 360 degree air diffusion pattern similar to a full round diffuser Rust Free Aluminum Made from strong