How to Measure For Vent Covers

1. Remove existing vent covers 

2. Measure the hole  
vent cover sitting above air duct hole vent cover opening with tape measure beside hole
Tip: Do NOT measure the old vent cover. Every vent cover has a different size of outside frame so we cannot use the old/existing vent cover as a guide Tip: For custom sizes, please send us the exact dimensions of the hole. This helps us determine which size works best. (do not undersize the dimensions)

3. Choose your 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: for a 10" x 4" opening, your vent cover dimensions will be as shown;

floor vent cover measurements illustration and dimensions

  • The "Stack" is the part of the vent cover that needs to fit into the hole opening. kul grilles stack dimensions are undersized by 1/4" for clearance.
  • Don't see your size? kul grilles can manufacture custom sizes. Click here to submit a quote request.
  • Still not sure what size to order? Click here to email kul grilles with your hole dimensions.

    Wall and Ceiling Applications

    kul grilles air vent covers can be used for wall and ceiling application as well as floor. In order to mount the vent covers securely to the ceiling and sidewall, select "Yes" from the "Include Mounting Holes" drop down menu.

    Fastening type: Countersunk screwholes  

    Mounting hole dimensions  
    floor register with screw hole diagram floor vent cover with hole diameter diagram
    Countersunk screwholes are visible from the face of the register cover and are required when mounting for sidewall and ceiling applications Matching finish, flush mount screws provided with each order

    Screws required for different grille sizes:

    Different sizes of register covers require a different number of holes to ensure the vent cover is properly secured into the ceiling / sidewall. The below diagram shows how many holes will be visible on each grille size and where they will be placed on the frame of the grille. 

     Number of Screws:

    air vent covers number of screws diagram

    Screw Placement:

    floor register screw placement