Actual Filter Size – 21 3/4"w x 27 3/4" x 1"
+ Product Details Size - 6"w X 34"h is the size for the duct opening measurement only
actual front end outer dimensions are approximately 22 5/8" width X 8 5/8" height
+ Product Details Operating Temperature From -40°F To +248°F [-40°C To +120°C]
+ Product Details Size – 36"w X 10"h is the size for the duct opening measurement only
18" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Color_R-8.0 Pink Actual Filter Size – 21+ Product Details Size 18"w X 10"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 875" width X 12" 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