Pull the vent forward and out of the opening.
How to measure a ventilated floor vent.
Measure the size of the duct.
Remove your existing floor wall or ceiling vent cover.
How to measure floor registers and grilles.
How to measure for wall ceiling and floor vent covers not hinged air returns step one.
Follow these measurement instructions for a snug fit.
If the vent is held in place by its own weight or tension pull the vent forward and out of the opening.
The length l is always expressed first followed by the height h dimension.
According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space.
Measure the size of the air duct opening.
Do not order by the size of your existing vent cover.
Measure the size of the air duct opening.
Note if the register or grille you are replacing is for a wall ceiling or floor.
Use this green technique to reduce kitchen humidity and warm the spare room.
Remove screws holding the vent in place.
Length in inches by height in inches this is your duct opening size.
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.
Do not measure the old register or vent.
A passive vent is placed in a wall or a floor enhancing air flow without burdening fuel powered ventilation systems.
Air registers grilles are ordered by the size of the actual duct opening in the wall floor or ceiling that the vent will fit into or cover not the overall size of the existing vent cover.
Remove the screws that hold the vent in place.
Order by the duct size.
Do not measure the old register or vent.
It is very easy to ensure that you order the properly sized vent the first time but in order to do so you need to be aware of a few basic rules.
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.
Measure the duct opening in your floor wall or ceiling.