Trane 5TAMXB05AV21D 42,000 BTU 3.5 Ton Variable Speed Multi-Position Air Handle Indoor Unit (For +18 SEER2 Matchups)Trane 5TAMXC05AV31D 42,000 BTU 3. 5 Ton Hyperion Variable Speed Communicating Air Handler Deliver advanced indoor comfort and system efficiency with the Trane 5TAMXC05AV31D, a 3. 5 ton Hyperion variable speed communicating air handler engineered for high performance residential HVAC systems. As part of Tranes Hyperion TAMX platform, this indoor air handler integrates Trane Link communication technology, a Vortica variable speed ECM blower motor, and a