8" [Duct Opening] Round Ceiling Diffuser - Easy Air Flow - HVAC Vent Duct Cover [Black] - [Total Outer Dimensions: 12"] Fixed Blades + Product Details Size – 4 X 12 Is CRFG2028 Width_14in
Yard notes & kiln story
Description
+ Product Details Size – 36"w X 20"h is the size for the duct opening measurement only
Actual Filter Size – 31 3/4"w x 35 3/4" x 1"
ready to cut for size of vent pipe
Actual Filter Size – 24 3/4"w x 15 3/4" x 1"
For 6" Round Duct Opening - Spiral or Flex
8" [Duct Opening] Round Ceiling Diffuser Easy Air Flow HVAC Vent Duct Cover [Black] [Total Outer Dimensions: 12"] Fixed Blades + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 36"w X 20"h is the size for the duct opening measurement only Actual Filter Size – 31 3 4"w x 35 3 4" x 1"