Trane 5TDM5B03AC21 30,000 BTU 2.5 Ton Single Phase Multi-Speed Cold Climate Air HandlerTrane 5TDM5B03AC21SA 30,000 BTU 2. 5 Ton R 454B Dedicated Variable Speed Air Handler Deliver reliable indoor comfort and efficient airflow performance with the Trane 5TDM5B03AC21SA, a 2. 5 ton dedicated air handler engineered for modern residential HVAC systems. As part of Tranes 5TDM5 series platform, this air handler features a variable speed ECM blower motor, copper tubealuminum plate fin indoor coil with Blue Fin coating, and a durable painted