If your unit originally utilized this 4-blade

High Strength Housing: Durable aluminum die-cast body designed for long-term service in demanding kitchen and utility environments

and dampers within Building Automation Systems (BAS)

This D-8B size component features a precision-machined 3/4 inch bore with a standard 3/16 x 3/32 inch keyway and set screw for a secure

Trane COV05621 Cover R-448A If your unit originally utilizedThe Trane COV05621 is a precision engineered OEM Trane replacement part designed for technicians requiring a exact fit HVAC enclosure panel. Constructed from heavy duty black steel, this 36. 59" x 33. 59" protective cover provides a critical barrier for internal system components against environmental debris, moisture, and mechanical impact. Unlike generic alternatives, this Trane steel cover maintains the structural integrity of the cabinet, ensuring