leak-free mechanical interface

The kit contains the high-strength nuts and bolts required for flange mounting

Ensure your heating and cooling equipment operates at peak capacity with this genuine factory-authorized component

For technicians performing damper actuator retrofitting

Can this controller manage multi-stage heating

Carrier 330539-757 Coupling Box 323055-751 leak-free mechanical interfaceThe Carrier 330539 757 Coupling Box is a critical OEM replacement component designed for 40 inch tall condensing gas furnaces. This genuine furnace coupling box kit replaces older ICP part numbers, including 320721 768, ensuring a precise fit and restoring the factory standard seal on the secondary heat exchanger. For technicians working on Carrier, Bryant, or Payne furnaces, this kit is essential when addressing common moisture or combustion air