How To Measure Floor Vent Size

To measure your register properly remove the existing register from the floor wall or ceiling in which it is installed.

How to measure floor vent size.

Remove the screws that hold the vent in place. Remove screws holding the vent in place. Most vent faceplates are large enough to support the register and cover the entire hole. The flush mount no frame is also ordered by measuring the duct size.

For example a 4 x 10 flush mount wood register has an overall size of 6 x 12. Note if the register or grille you are replacing is for a wall ceiling or floor. This means that floor registers will often be smaller number first like 4 10 or 4 12. The length l is always expressed first followed by the height h dimension.

For floor registers they follow the same rules as return grilles where you state the dimension parallel to the louvers first. Measure the duct opening in your floor wall or ceiling. Measure the opening in your floor wall or ceiling. Then measure the length and width of the air duct opening.

How to measure and replace a floor register. Many of our vent grilles include directional patterns so it is crucial to provide both dimensions in their respective order. Pull the vent forward and out of the opening. However the overall size of the opening must be considered.

Take out the existing floor register and measure the length width of the opening in inches all registers will be listed in inches. A register is measured by the size of its louvers which is the bottom of the register that fits into the ventilation duct. Measure the size of the air duct opening. The width and length of your opening should match the duct opening sizes.

For sizing please use the duct size and reference the overall frame size for installation. Length in inches by height in inches this is your duct opening size. If your duct work opening in the floor is 4 x 10 you ll need to purchase a 4 10 floor register.