Designed for heavy-duty operational stability

Durable Construction: Manufactured with high-grade materials to withstand the rigorous demands of continuous industrial air conditioning and heating cycles

or 9MPT series

Key Benefits for the Contractor: Exact OEM Compatibility: Directly replaces Lennox

9-inch diameter

Bard 8406-079BX Switch 321894-708 Designed for heavy-duty operational stabilityThe Bard 8406 079BX Switch is an OEM differential pressure switch engineered for precision air pressure monitoring in Bard HVAC systems. This . 63" WC pressure switch is a critical component for verifying airflow proving and static pressure, ensuring your wall mount units or packaged systems operate within safe parameters. Field proven for reliability, the 8406 079BX features a factory set trip point of . 63 inches Water Column, making it an essential