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How to measure sizes .
Removing the Old Floor Register or Grille:
Start by removing the old floor register or grille from the duct opening. This step is crucial as it allows you to access the duct opening for accurate measurement and replacement.
Measuring the Duct Opening Size:
When measuring for a new floor register or grille, it’s important to measure the duct opening size itself, not the overall dimensions of the existing register or grille faceplate. This ensures that the new register or grille will fit properly.
Dampers and Lips:
For floor registers with dampers, the dampers typically drop in about 1.5 inches into the duct. This ensures that the damper fits securely and allows for proper airflow control. Grilles, on the other hand, often come with lips that drop into the duct opening, providing a secure grip and stable hold inside the duct.
Wall Registers and Grilles:
Faceplates for wall registers and grilles come with predrilled, countersunk holes and matching screws for secure attachment to the wall. This ensures that the register or grille remains securely in place once installed.
Takeaway Summary:
- Always measure the duct opening for the most accurate measurement, rather than measuring the faceplate or existing register or grille.
- Faceplates typically have around a 1-inch border all around to ensure they cover the rough parts of the duct opening.
- Dampers usually drop in about 1.5 inches inside the duct for proper installation and airflow control.
- For odd-sized duct openings, custom-sized grilles are available. Provide the duct size for more information and assistance in ordering a custom grille.
