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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
The factory-installed PIR cover uses infrared detection to shift the thermostat into an economy "unoccupied" mode when no movement is detected
this control module ensures precise 24V gas valve timing and blower integration
Can I use a universal overload instead of the K90-35
Key Benefits for the Field: Direct Retrofit Compatibility: Seamlessly replaces 33CSSN2-WC and P474-1010
Efficiency Enhancement: Restoration of factory-spec airflow helps maintain lower condensing temperatures
Resideo ZD18X8TZ Damper R-448A The factory-installed PIR cover usesThe Resideo ZD18X8TZ is a high performance 18x8 zone damper designed for precision airflow control in residential and commercial forced air zoning systems. This parallel blade damper features a power closed spring return open configuration, ensuring fail safe operation to the open position during power loss or system interruptions. Engineered for seamless integration with Honeywell Home zoning panels, the unit utilizes a robust 24VAC synchronous motor