How to Measure
1. Remove current vent covers
Note: Do NOT measure the existing air vent cover. Every vent cover has its own unique size of frame so we cannot use the old vent cover as an accurate measurement guide.
2. Measure the existing hole
Note: For custom size vent covers please send the exact dimension of the existing hole. This helps determine a more accurate measurement and what size would fit best.
3. Determine the grille size
At kul grilles, we offer a large variety of grille sizes that will suit your space. If you don't see your required size, please contact us for a custom quote
Determining a kul grille size
| Hole Opening Dimensions | Choose This Grille Size | Stack Dimensions | Overall Frame Dimensions |
| 10" x 3" | 10" x 3" | 9 3/4" x 2 3/4" | 11 3/4" x 4 3/4" |
| 10" x 4" | 10" x 4" | 9 3/4" x 3 3/4" | 11 3/4" x 5 3/4" |
| 12" x 2.5" | 12" x 2.5" | 11 3/4" x 2 1/4" | 13 3/4" x 4 1/4" |
| 12" x 4" | 12" x 4" | 11 3/4" x 3 3/4" | 13 3/4" x 5 3/4" |
| 14" x 2.5" | 14" x 2.5" | 13 3/4" x 2 1/4" | 15 3/4" x 4 1/4" |
| 14" x 4" | 14" x 4" | 13 3/4" x 3 3/4" | 15 3/4" x 5 3/4" |
| 10" x 6" | 10" x 6" | 9 3/4" x 5 3/4" | 11 3/4" x 7 3/4" |
| 12" x 6" | 12" x 6" | 11 3/4" x 5 3/4" | 13 3/4" x 7 3/4" |
| 14" x 6" | 14" x 6" | 13 3/4" x 5 3/4" | 15 3/4" x 7 3/4" |
| 14" x 8" | 14" x 8" | 13 3/4" x 7 3/4" | 15 3/4" x 9 3/4" |
Example
Note: for a 10" x 4" hole opening vent cover dimensions will be as shown as the following;
- "Stack" is referred to the part of the vent cover that needs to be placed into the existing hole. kul grilles stack dimensions are intentionally undersized by 1/4" for sufficient clearance.
- Still unsure of what size to order? Click here to message the kul grilles customer service team for additional help.
Check out our grille visualizer tool to see your vent cover for floor, ceiling or walls
How To Measure - Video Tutorial
Wall and Ceiling Application
Our grilles scan be used for wall and ceiling applications as well as for standard floor vent covers. To mount vent covers securely to a ceiling or sidewall, select the "Yes" option from the "Include Mounting Holes" menu option as listed on our product pages.
Countersunk screwholes
Countersunk screw holes are visible from the face of the air vent cover and are required for sidewall and ceiling mounting applications.
Mounting hole dimensions
Matching finish flush mount screws are supplied with every order where the mounting hole option is selected.
Number of screws required for various vent cover sizes
Different sized vent covers do require a different number of screw placement holes to ensure that the vent cover is sufficiently secured into a sidewall or ceiling. The following diagram outlines how many screw holes will be visible on each vent cover size and exactly where the screw placement hole will be placed on the frame for each vent cover.
Screw Placement
Check out our grille visualizer tool to see your vent cover and screw placement