The RunTru by Trane A5AHC002A1B3 Air Handler is a durable, high-efficiency solution for residential comfort. Designed to work with eco-friendly R-454B refrigerant, this 1.5–2 ton unit delivers reliable airflow and long-lasting performance. Its fully insulated cabinet and corrosion-resistant aluminum coil ensure durability, while its compact, multi-positional design allows flexible installation in upflow, downflow, or horizontal applications.