The length l is always expressed first followed by the height h dimension.
How to measure floor vents.
Do not measure the old register or vent.
It is an industry standard to measure the actual hole opening in the floor to get the correct size of floor register or grille that you will need.
Take out the existing floor register and measure the length width of the opening in inches all registers will be listed in inches.
Measure the size of the duct.
Order by the duct size.
Remove the screws that hold the vent in place.
The width and length of your duct opening will be the size of the register to order.
How to measure floor registers and grilles.
How to measure for wall ceiling and floor vent covers not hinged air returns step one.
Measure the size of the air duct opening.
Do not order by the size of your existing vent cover.
Once you have mastered how to measure floor vents and air registers you can start to pick out your vents on our register and vent product pages you will see a dimensions section that lists the actual damper measurements the overall faceplate measurements and the drop in depth.
Many of our vent grilles include directional patterns so it is crucial to provide both dimensions in their respective order.
If the vent is held in place by its own weight or tension pull the vent forward and out of the opening.
Pull the vent forward and out of the opening.
Do not measure the old register or vent.
Locate the register or grille you are replacing and note if it is for a wall ceiling or floor.
Measure the size of the air duct opening.
Remove screws holding the vent in place.
Note if the register or grille you are replacing is for a wall ceiling or floor.
Registers these typically slatted covers are found in the floor wall or ceiling and their defining feature is a lever that allows you to open or close the air vent to adjust airflow into the space.
Please measure again to make sure you measured correctly.
Length in inches by height in inches this is your duct opening size.
Measure the duct opening in your floor wall or ceiling.
You can find floor registers in a variety of materials styles and finishes so you can incorporate them as a decorative element that also blends.