Lennox 39H23 Coupler 320074-702 8 Cv flow capacity to

8 Cv flow capacity to ensure accurate mixing and temperature stability

To ensure proper torque and motor protection

What are the signs of a failing heat exchanger in these units

With a 3/8" NPT connection and a substantial 3 Cv flow coefficient

Lennox 39H23 Coupler 320074-702 8 Cv flow capacity toThe Lennox 39H23 Damper Coupler is a critical OEM replacement part engineered for commercial and residential HVAC ventilation systems. As a right hand blade damper coupling, this component ensures the mechanical synchronization between the damper blades and the actuator shaft. Constructed from high grade, durable nylon, the 39H23 is designed to withstand the high cycle demands of modern economizers and air handling units without deforming or slipping.