How To Measure Floor Vent Size

Most vent faceplates are large enough to support the register and cover the entire hole.

How to measure floor vent size.

Remove the screws that hold the vent in place. For floor registers they follow the same rules as return grilles where you state the dimension parallel to the louvers first. Locate the register or grille you are replacing and note if it is for a wall ceiling or floor. Many of our vent grilles include directional patterns so it is crucial to provide both dimensions in their respective order.

This means that floor registers will often be smaller number first like 4 10 or 4 12. For example a 4 x 10 flush mount wood register has an overall size of 6 x 12. Length in inches by height in inches this is your duct opening size. If your hole measures 3 7 8 x 9 7 8 you should be able to use a 4 x 10 floor register depending on the style.

Note if the register or grille you are replacing is for a wall ceiling or floor. The length l is always expressed first followed by the height h dimension. Pull the vent forward and out of the opening. How to measure and replace a floor register.

Measure the opening in your floor wall or ceiling. You could also use a 4 x10 floor register if your hole measured 4 1 4 x 10 1 2. The width and length of your opening should match the duct opening sizes. Measure the size of the air duct opening.

Measure the duct opening in your floor wall or ceiling. However the overall size of the opening must be considered. To measure your register properly remove the existing register from the floor wall or ceiling in which it is installed. If your duct work opening in the floor is 4 x 10 you ll need to purchase a 4 10 floor register.

The flush mount no frame is also ordered by measuring the duct size. A register is measured by the size of its louvers which is the bottom of the register that fits into the ventilation duct. Take out the existing floor register and measure the length width of the opening in inches all registers will be listed in inches.