Lennox 11U71 Pressure Switch 321894-706 This unit is built with

This unit is built with durable aluminum blades and utilizes a 1/2 inch bore diameter on the discharge side for a secure hub fit

close on fall refers to the switch making electrical contact as the pressure "falls" further into a negative vacuum (becoming more negative) to reach the set-points of -

Designed with 1-3/8 inch ODF suction and 7/8 inch ODF discharge brazed connections

Precision Control: The two-position 24V operation integrates seamlessly with standard building automation systems and thermostats

the Schneider Electric MA-305 is the direct spec-for-spec replacement for the ADDB-1 and all MA-305-0-0-X variants

Lennox 11U71 Pressure Switch 321894-706 This unit is built withThe Lennox 11U71 High Altitude Pressure Switch is a critical safety component designed for furnace pressure switch replacement in systems operating at elevations between 4,500 and 7,500 feet. Calibrated with a precise 0. 85" WC (water column) actuation point, this OEM Lennox part ensures the inducer motor generates sufficient static pressure for safe combustion before allowing the gas valve to energize. This specific 104371 08 model is a SPST N. O.