Resideo ZD28X8TZ Damper 321702-401 this mechanical switch operates on

this mechanical switch operates on a liquid-filled sensing element

Its aluminum die-cast housing ensures structural integrity while the integral vent limiting orifice eliminates the need for external vent piping in most indoor configurations

Trust the Aaon R86790 for accurate gas furnace flame sensing and robust system protection

it features a specialized shaft configuration often found in Shipco’s Model D

making it an ideal HVAC pressure sensor for monitoring static and dynamic overpressures in building automation systems

Resideo ZD28X8TZ Damper 321702-401 this mechanical switch operates onThe Resideo ZD28X8TZ is a heavy duty, 28" x 8" parallel blade zone damper engineered for precise airflow management in high static pressure environments. Built with a rugged extruded aluminum frame and reinforced blades, this rectangular damper utilizes a 24Vac synchronous motor to deliver reliable two position control. The power closed spring return open configuration ensures a fail safe normally open state, maintaining critical ventilation during