18" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12in diameter reducing energy costs and maximizing

reducing energy costs and maximizing HVAC system lifespan

actual front end outer dimensions are approximately 42 5/8" width X 22 5/8" height -

Actual Filter Size – 17 3/4"w x 15 3/4" x 1"

expanding or retracting the gap to meet your precise needs

18" X 18" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 12in diameter reducing energy costs and maximizing+ Product Details Size 18"w X 18"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 20" 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