Trane 5TEM4D05AC41SA 42,000 BTU 3.5 Ton Multi Speed Multi Position Air HandlerTrane 5TEM4D05AC41SA 42,000 BTU 3. 5 Ton R 454B Convertible Constant Torque Air Handler Deliver dependable indoor comfort and efficient airflow performance with the Trane 5TEM4D05AC41SA, a 3. 5 ton convertible air handler engineered for modern residential HVAC systems. As part of Tranes 5TEM4 series platform, this air handler integrates a constant torque ECM blower motor, all aluminum plate fin indoor coil, and insulated galvanized steel cabinet