All American Wood Register All American Wood Register develops HVAC diffuser collars All American Wood Register makes High Velocity HVAC Diffuser Collars.

All American Wood Register makes High Velocity HVAC Diffuser Collars. Offered in 56 wood species in unfinished surfaces, the collars are designed to caulk to standard plastic diffusers on floors, walls and ceilings, the company says. Circle 353 on the Reader Inquiry Card. www.allamericanwood.com