36" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_Black + Product Details Size –

+ Product Details Size – 12"w X 14"h is the size for the duct opening measurement only

And The Cooler Air From Outside WIll Flow In From The Bottom

designed to optimize your air distribution

actual front end outer dimensions are approximately 16 5/8" width X 30 5/8" height

+ Product Details Size – 10" x 20" or 20" x 10" is the size for the duct opening measurement only

36" X 12" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_Black + Product Details Size –+ Product Details Size 36"w X 12"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 37. 875" width X 14" height. High Quality High quality steel construction, no scuff powder coat durable finish, smooth, shiny, scratch resistant, no sharp edges, 2 recessed screw holes on each side with screws included, screws same color as vent cover, easy installation. Adjustable airflow control Adjustable airflow