40.00 Dollar US $ · Lennox 34M77 Pressure Switch with Bracket 1.00 Inch Water Column

Published date: February 23, 2026 5:54 pm

Location: 700 Nicholas BLVD Suite 105 Elk Grove Village IL 60007, chicago, IL, United States

The Lennox 34M77 Pressure Switch with Bracket is a safety control device rated at 1.00 inch water column, designed for use in compatible Lennox furnaces and heating systems. It monitors air pressure within the venting or combustion system and closes or opens the electrical circuit based on proper draft conditions. This ensures safe ignition and operation by preventing burner startup if airflow is inadequate. Durable and factory-calibrated, it enhances system safety, protects components, and supports reliable, efficient heating performance.

For an efficient and reliable HVAC system, the Lennox Pressure Switch with Bracket Water Column is a great choice for optimal system performance.


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