Vent Covers, Registers, & Regulators
Measure the opening in your floor, wall or ceiling.
The width and length of your opening should match the width and length of specific register/grill you require. This is the opening (inside) measurement. Outside size of register/grill will be bigger than opening size.
Please specify if you require holes to mount (metal units)
Please allow a minimum of 2 1/2" for clearance behind vent cover