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High Thermal Stability: The Class F insulation protects against internal heat soak
Key Benefits Steam-Rated Performance: Engineered with PTFE seals and brass construction to withstand consistent 125# steam pressure
calibrated for natural gas standard pressure regulators
The cast iron V-belt pulley construction effectively dissipates heat
Resideo ZD12X18TZ Damper 321894-706 High Thermal Stability: The ClassThe Resideo ZD12X18TZ Damper is a professional grade 12" x 18" zone damper engineered for high performance airflow management in multi zone residential and light commercial HVAC systems. This parallel blade zone damper features a heavy duty extruded aluminum frame and rigid aluminum blades, ensuring structural integrity and a low leakage seal (less than 1% at 0. 5 in. WC) that maximizes system efficiency. Designed as a power closed spring return open
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