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The 331-4510 features a factory-set 5-10 psi spring range
reducing soot accumulation and internal heat exchanger stress
removing the need for jumpers and reducing installation errors on the job site
a specific conversion kit (typically 393691) is required and must be installed by a licensed technician
Common Questions What causes a Lennox 10M75 limit switch to trip frequently
Resideo ZD24X10TZ Damper 318518-761 The 331-4510 features a factory-setThe Resideo ZD24X10TZ is a heavy duty 24" x 10" parallel blade zone damper engineered for precise airflow management in high static residential and light commercial forced air systems. This rectangular zone damper utilizes a synchronous 24VAC motor with a power closed spring return open (fail safe) configuration, ensuring optimal ventilation even during power loss. Built with a rugged extruded aluminum frame and parallel blades, this unit is designed
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