always verify the maximum working pressure (typically 450 psig) against your system requirements

As a trusted HVAC mechanical relay

Designed to withstand the thermal cycling inherent in industrial and residential combustion environments

By utilizing integrated micro-controllers

Lennox 21W89 Transformer/Relay 326058-758 always verify the maximum workingFor veteran technicians looking to maintain system integrity, the Lennox 21W89 Transformer Relay is a critical OEM component engineered for precision HVAC voltage regulation. This heavy duty transformer relay assembly is designed to step down 120V line voltage to a consistent 24VAC output at 40VA, 50 60Hz, ensuring stable low voltage control circuit operation even in demanding environments. By integrating a high performance electromechanical relay,