For the best visual presentation and performance (optimal air flow), the overall grille will be sized so that the opening (vent or duct) will be covered by the patterned area and a border will surround that pattern. Border size and pattern size can be varied to your preference.
Inspect your opening to be sure it is clear; in other words, there are no obstructions that might interfere with the grille fitting into or over that opening.
Then measure top to bottom for the height (H) and left to right for the length (L) of your opening. This information will be provided to your customer support team here at Advanced Arch Grilles to determine the best fit for your opening.
If you require a certain-sized border, you can specify the dimensions (both height and length) of the border. Or if you prefer, your customer support team can recommend an aesthetically-pleasing and proportioned border size for the grille you select.
