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2) measure the duct opening or the size of the hole
Whether you prefer to leave it fully open for optimal airflow or close it off completely to redirect extra heat or air conditioning to other rooms
Independent cardboard packing for extra protection
If your duct opening size is 10'' X 10''
The Listed size 12"x12" is for inside duct opening measurement
8" x 6" Adjustable Blade Sidewall Ceiling Register Vent Cover Diffuser Heavy Duty Stamped Steel (Outside Dimension 10" x 8") 2) measure the duct openingFirst thing to know about size selection: take the vent cover off the wall or ceiling. Measure the duct opening where the vent can fit in. Use the measurement to determine right size to buy. This product has listed size 8w X 6h is for duct opening measurement only, actual outsize overall dimensions is 10 wide by 8 high. If your duct opening size is 8 x 6, this is the right size and will fit in well. If you measure outside or surface size, you will get
US$ 112.50
US$ 36.00
US$ 14.90