18" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Insulated Line Set + Product Details Size - Compatible With Duct 7in Applications This sheet metal DDAG-A-1212

+ Product Details Size - 26"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 10 5/8" width X 20 5/8" height

actual front end outer dimensions are approximately 30 5/8" width X 34 5/8" height

+ Product Details Size – 24"w X 8"h is the size for the duct opening measurement only

Actual Filter Size – 7 3/4"w x 29 3/4" x 1"

18" X 4" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling Insulated Line Set + Product Details Size Compatible With Duct 7in Applications This sheet metal DDAG A 1212 + Product Details Size 26"w X 22"h is the size for the duct opening measurement only actual front end outer dimensions are approximately 10 5 8" width X 20 5 8" height