Lennox 26W76 SPST Pressure Switch 0.40" WC

The Lennox 26W76 is a single-pole single-throw (SPST) pressure switch designed for HVAC applications requiring precise air pressure sensing. This pressure switch is calibrated to actuate at 0.40 inches water column (WC), making it ideal for monitoring combustion air pressure, draft pressure, or vent pressure in gas furnaces and heating equipment.

Key Features:

• Pressure activation point: 0.40" WC (inches water column)
• SPST (Single Pole Single Throw) switching configuration
• Designed for Lennox HVAC systems and compatible equipment
• Safety-critical component that ensures proper system operation
• Factory-calibrated for consistent, reliable performance

This pressure switch serves as a safety control that verifies adequate air pressure before allowing the heating system to operate. It's commonly used in induced draft furnaces to confirm proper venting conditions. When the pressure differential reaches the setpoint, the switch closes to complete the circuit and signal that safe operating conditions exist.