How To Measure

Top Mount

When measuring, measure the actual opening in the floor/wall/ceiling. The register itself has a 3⁄4” lip on each side. For example the overall size of 4×10 self-rimming vent will be 5 1⁄2” x 11 1⁄2”. Please specify if there is a specific overall size you require.

Flush Mount

Duct Opening – measure the duct opening in the floor/wall. The vent comes with the frame that sits around the opening. For “AV FLUSH MOUNT FLOOR VENTS” please round up to whole even numbers.

Frame Size – the overall size of the vent including the frame. This is the best option if you are installing the floor and don’t have the vents. In this case, you can leave about 1 1⁄4” to 1 1⁄2” space around the duct opening. When you place the order, you select the “frame size” option and provide the total outside dimensions. We usually make it about 1/16” bigger, so you’re able to trim it to make it fit perfectly.

Baseboard Style

You can either measure this style the same way as a you would the duct opening or frame size. Usually the thickness of the vent is made to match the thickness of the baseboard. If providing the duct opening size, the vent comes 3⁄4” bigger on each side.

Flush Mount Wall

This register is measured the same way a duct opening flush mount vent is measured. However, it is important to note that the metal frame is made to fit directly into the opening in your wall.

Can a flush mount floor vent be put in after the floor has been installed?

Yes, however, it will require some professional skills. You have the option to install with or without the frame, for the second option we provide a template. Please note that you would require a router to install without the frame.

How to install the air vent for floated floors.

We recommend installing these vents as you would a top mount. Provide the opening size and just drop the vent in, it will sit on top of the floor.


Normally, we will need only one measurement to begin your order: the duct opening (or air flow) size, which is the actual size of the cut-out in your flooring, wall, cabinet, door or ceiling. Sometimes, however, we will also need the overall size (the size that you want your vent to be, including any lip or rimming around the vent) to fit into your baseboard molding or cabinetry, and sometimes we’ll need the depth of flooring, door or other inset that the vent will be placed into. If you have any questions, feel free to get in contact with us! Remember – measure twice, cut once. We’re happy to help!

Wood is a natural material. There will be variation, including knots, texture and grain variations. We cannot control or guarantee the exact look of any product.