Model ABD easy, even automatic air distribution 5 ABD MODELS AVAILABLE: * Model ABD is UL2043 classified for flame spread and smoke. * Model ABD-FD includes a UL 555 rated static fire damper and is UL rated and approved. * Model ABD-GM with flanged grille mounting box. * Model ABD-T with a square to round transition. * Model CRD-1WT is UL classified for wood truss floor/ceiling assemblies with an optional ABD mounted in the plenum box. Greenheck's Automatic Balancing Dampers ensure steady, constant airflow throughout a building for energy-efficient indoor air quality that keeps employees happy-and productive. The ABD series are pressure independent constant volume valves that automatically adjust to changes Newest Model ABD-FD in airflow throughout the system. Without them, air volume can vary widely from floor to floor. Compatible with both supply and exhaust applications, 20 different pressure settings can be hand-adjusted in the field. Learn more at greenheck.com Scan the QR code to watch our damper video: © 2019 Greenheck Fans | Energy Recovery | Packaged Ventilation | Make-up Air Lab Exhaust | Dampers | Louvers | Coils 715.359.6171 greenheck.com J U LY 2 0 19 ashrae.org ASHRAE JOURNAL 69http://www.greenheck.com http://www.greenheck.com http://www.ashrae.org