24" X 30" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Powder Coated + Product Details Size –

+ Product Details Size – 20"w X 36"h is the size for the duct opening measurement only

1/2" White insulation will give you a good R value of 3

this easy-to-install grille fits seamlessly into any standard return filter opening

Actual Filter Size – 27 3/4"w x 29 3/4" x 1"

complete with a set of sponge gasket and mounting frame

24" X 30" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Powder Coated + Product Details Size –+ Product Details Size 24"w X 30"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 25. 875" width X 26" 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