Precision Airflow: Sustains 1650 RPM output to ensure the blower wheel delivers the correct CFM across the heat exchanger

The WHL1278 fits many Trane and American Standard air handlers

Its internal Amodel flow-characterizing disk and graphite-reinforced PTFE seats ensure high rangeability and tight shutoff (ANSI Class IV)

While the 97955 is a widely used venter assembly

Optimized Energy Efficiency: Intermittent pilot operation eliminates continuous pilot flame

A.J. Antunes JD-2-PURPLE Pressure Switch 318172-701 Precision Airflow: Sustains 1650 RPMThe A. J. Antunes JD 2 PURPLE Pressure Switch is a high precision, industrial differential vacuum and air pressure switch engineered for sensitive monitoring in HVAC and combustion safety systems. This OEM air proving switch features a specialized purple spring calibration, supporting an adjustable set point range from 0. 1 to 10 inches water column (W. C.). Designed with a single pole double throw (SPDT) snap action switch, it provides reliable auto