Features Galvanized steel construction. Fully insulated. Parallel blade dampers with bronze bushings. Damper linkage and hardware. Options Economizer control. Low leak dampers. Filter rack. Vertical application. Custom designed arrangements. Built in relief damper. Documents & MediaMixing Box Controls Product Search Mixing Box OEM --None-- TRANE CARRIER ADDISON YORK LENNOX RHEEM GENERIC GOODMAN DAIKIN Search Submittals Product Search By Width and Depth Width Depth Search Submittals