There are two ways to measure for Alea:
Method #1
The most accurate method is to measure the rough opening dimensions behind the existing registers. Alea vent measurements are based on the ducting size, NOT the dimensions of the vent cover grilles.
STEP 1: Remove the existing vent register in the floor, wall or ceiling.
STEP 2: With the register removed, measure the duct opening (Width in inches-by-Height in inches)
STEP 3: Order your Alea vent based on your measurements. Match the measurements to the correct Alea vent size pull down on the 'Shop'' page.
- The Width and Height of your opening should closely match one of the supported Width and Height of the available Alea vent sizes.
Alea Supported Sizes (Batch 1):
3"x10", 4"x10", 6"x10", 4"x12", 6"x12", 4"x14"and 6"x14"
Method #2
It's not always easy or convenient to remove and measure the duct opening behind the existing vents. An alternative method we find works, though not as accurate, is to measure the external dimensions of the grille cover (faceplate) and then take 1 to 1.5 inches off the measurements to estimate the duct size behind the grille.
As an example: If your grille cover measures 11.5 inches by 5.5 inches, your duct size would be approximately 10 inches (11.5 inches minus 1.5 inches) by 4 inches (5.5 inches minus 1.5 inches). You'd then order a 4" x 10" Alea Vent.
The following table shows grille cover measurements and the Alea vent size to use:
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