Improved System Reliability: Reduces the frequency of furnace lockout errors caused by weak or failing igniters

The 2-10VDC feedback signal is a standard industry protocol

Technical Precision: Designated as a Size 5 diaphragm to ensure the correct pressure-to-stroke ratio in calibrated controllers

Broad Compatibility: Fits a wide range of forced-air heating systems across the Carrier Corporation family of brands

Key Benefits Precise Modulation: Facilitates instantaneous gas flow adjustments to maintain setpoint accuracy within the 80-130°F range

Lennox 44H12 Tubing 321894-708 Improved System Reliability: Reduces theThe Lennox 44H12 Pressure Switch Tubing is a critical 19 inch OEM replacement part designed for precise pressure monitoring in commercial HVAC systems and residential furnaces. With a 3 16 inch ID and 5 16 inch OD, this specialized tubing connects the inducer motor or collector box to the furnace pressure switch, ensuring the control board receives accurate pneumatic signals for safe ignition sequences. Constructed from high grade, flexible