The assembly features automatic ball checks as a critical safety mechanism

It is the primary replacement for X70370526010 and is also compatible with legacy part numbers MOT07621

This is a 2-wire damper

Common Technician Questions What are the specific connection sizes for the Sporlan 168804P

Resideo ZD8X18TZ Damper 320734-701 The assembly features automatic ballThe Resideo ZD8X18TZ is a heavy duty 8 inch x 18 inch rectangular zone damper engineered for precise airflow management in forced air systems. Constructed with a solid extruded aluminum frame and parallel blades, this unit minimizes pressure drop while ensuring a low leakage seal (less than 1% at 0. 5 in. WC) when closed. It features a 24Vac power closed, spring return open configuration, making it a reliable fail safe solution that defaults to the