Registers & Grilles · Registers & Grilles
Double-deflection register
Wall/ceiling
ConnectionBoot neck
SupportBoot support
Before you start
- Confirm register size, boot, front- and rear-blade orientation, damper, throw pattern, and room layout.
- Inspect both blade banks, linkage, frame, and damper.
- Verify the desired throw does not conflict with occupants, glazing, or obstructions.
- Coordinate access to the damper.
Tools and materials
Double-deflection register, matching boot, branch duct, fasteners, sealant, level, and hand tools.
Lay it out
- Locate the register and intended throw.
- Set front and rear blade banks for the approved pattern.
- Keep the damper accessible.
Set and support it
- Support the boot independently.
- Keep the frame square.
- Support the branch so it does not twist the boot.
Make the connection
- 1
Install and support the boot.
- 2
Connect and seal the branch.
- 3
Mount the register square.
- 4
Set the rear blades for primary direction.
- 5
Set the front blades for spread.
- 6
Operate the damper.
- 7
Verify the final throw.
Check the install
- Both blade banks move freely.
- Face is level.
- Throw direction matches the room.
- Damper remains accessible.
- Boot carries no ceiling or wall load.
Common mistakes
- Setting both blade banks the same way.
- Aiming air at a wall or occupant.
- Burying the damper.
- Letting the branch twist the face.
Stop and ask
Stop if the airflow pattern conflicts with the room layout, the blade banks bind, or the boot cannot be supported independently.