More About Aluminum Square One-Way Ceiling Diffusers (A501 Series)
The A501 Series Aluminum Square One-Way Diffusers for sidewall/seiling application by Hart & Cooley have extruded aluminum construction, cores flush with margin, a face mount for easy installation, inconspicuous fingertip lever for air volume control, and a bright white finish. They can have ether multi-shutter or opposed-blade dampers.