Resideo ZD28X8TZ Damper 321702-401 Its aluminum die-cast housing ensures

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

it demands hardware that can safely accommodate the increased fuel volume needed for the same BTU output

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

this mechanical switch operates on a liquid-filled sensing element

Resideo ZD28X8TZ Damper 321702-401 Its aluminum die-cast housing ensuresThe 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