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- REZNOR® Combustion Air Pressure Switch, High Altitude High Speed, 1.1 in WC
 
- Monitors flow of combustion air
 - If it is determined that the pressure switch needs replacing, use only the factory-authorized replacement part that is designed for the model and size of heater being serviced
 - Models SDH, PDH, RDH heater
 
- Pressure Rating1.1 in WCManufacturerNORTEK GLOBAL HVACManufacturer #201158TypeHigh Altitude High Speed