Description
The Reznor 197031 High Altitude Pressure Switch is a genuine OEM combustion air safety control designed for commercial and industrial Reznor gas‑fired unit heaters. This pressure switch monitors the negative pressure (draft) in the venting or combustion air pathway and verifies that airflow meets the safety requirements for proper operation. Its high‑altitude calibration makes it especially suitable for installations at elevated elevations where standard draft conditions differ from sea level.
Key Features
- Genuine Reznor OEM pressure switch designed for combustion airflow safety monitoring
- Calibrated for high altitude applications to ensure accurate draft performance
- Typically set to 0.35″ water column (W.C.) for precise pressure activation
- Verifies proper vent and airflow before enabling burner operation
- Precision‑manufactured to meet factory specifications for fit and reliability
- Suitable for a wide range of Reznor heater models, including UDX, UDZ, UBX, and UBZ series
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