the second number represents the height
+ Product Details Size – 22"w X 16"h is the size for the duct opening measurement only
+ Product Details Size - 8"w X 4"h is the size for the duct opening measurement only
Control Your Airflow on drop ceiling grilles
actual front end outer dimensions are approximately 38 5/8" width X 14 5/8" height -
20" X 10" ADJUSTABLE AIR SUPPLY DIFFUSER - HVAC Vent Duct Cover Sidewall or Ceiling Grille the second number represents the+ Product Details Size 20"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