18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in

actual front end outer dimensions are approximately 22 5/8" width X 28 5/8" height

actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height -

making it compatible with most thermostat models

Actual Filter Size – 7 3/4"w x 35 3/4" x 1"

18" X 6" ADJUSTABLE AIR SUPPLY DIFFUSER HVAC Vent Duct Cover Sidewall or Ceiling 18in diameter actual front end outer dimensions 4 X 12 Is CRFG2028 Width_14in actual front end outer dimensions are approximately 22 5 8" width X 28 5 8" height actual front end outer dimensions are approximately 12 5 8" width X 12 5 8" height