Allied 5 Ton Upflow/Horizontal Constant Torque ECM Air Handler with R-454B Refrigerant The 5-ton Allied air handler is designed for upflow and horizontal installations, offering flexible configuration for residential and light commercial HVAC systems. It features a Constant Torque ECM blower motor for quiet and energy-efficient airflow. The unit includes an Omniguard coil for advanced corrosion protection, mechanical or brazed line set connections, a check and expansion valve, and a factory-installed TXV for precise refrigerant control.