this internal pilot-operated valve requires zero differential pressure to open

the Lennox 93W13 Blower Assembly is the exact OEM drop-in fix you need for 80% and 90% AFUE furnaces

Optimized Performance: Engineered to restore factory-rated AFUE ratings and reduce system short-cycling

please verify current manufacturer technical data for a rated alternative

and 767 Series units

Mitsubishi Electric PAC-MKA33BC Branch Box 323080-701 this internal pilot-operated valve requiresThe Mitsubishi Electric PAC MKA33BC 3 Port Branch Box is an OEM refrigerant distribution component designed for compatible Mitsubishi Electric MXZ and SMART MULTI heat pump systems. It connects one compatible outdoor unit to as many as three indoor units, allowing independent zone control through a properly configured multi zone installation. This Mitsubishi branch box routes refrigerant between the outdoor unit and connected indoor units while