RV and Home Brown Stamped Steel Floor Diffuser/Register with Damper 8" X 4" (Duct Opening Size) Outside Dimension 9.6"x 5.6" Compliant with ANSI Z21

Compliant with ANSI Z21

Width vs Height The first measurement in a return grille size is the width(horizontal measurement)

If your duct opening size is 10” x 6”

Duct opening – a hole that holds the duct neck to allow air to come out from HVAC system

The Listed size 14"x14" is for inside duct opening measurement

RV and Home Brown Stamped Steel Floor Diffuser/Register with Damper 8" X 4" (Duct Opening Size) Outside Dimension 9.6"x 5.6" Compliant with ANSI Z21The Listed size 8"x 4" is for inside duct opening measurement, actual outside dimension is 9. 6"x 5. 6" Butterfly damper with easy foot operated control dial for desired air flow Two sunk screw holes located at both sides of the register for ceiling and wall mounting with included screws Brown powder coating with matte finish Individually shrink wrapped with card board pad in the back for extra protection