Resideo ZD20X16TZ Damper L99H008 Durable Construction: The solid 17-4PH

Durable Construction: The solid 17-4PH stainless steel body resists physical shock

making it a staple for technicians maintaining tankless heater kits and domestic hot water loops

Field diagnostics should focus on verifying input voltage and continuity across the safety string

which mandates a physical inspection before the burner can be restarted

Resideo ZD20X16TZ Damper L99H008 Durable Construction: The solid 17-4PHThe Resideo ZD20X16TZ is a professional grade rectangular zone damper engineered for tight airflow control in multizone forced air systems. This 20x16 parallel blade damper utilizes a 24VAC synchronous motor mounted on the 16 inch side, featuring a power closed spring return open configuration. Designed for fail safe operation, it automatically reverts to the open position during power loss to ensure continuous ventilation. The assembly is constructed