this unit is built to manage the precise air-to-fuel ratios required for efficient ignition and consistent heat exchanger performance

3000 BTU Cooling Capacity provides precise thermal management for medium and small footprint units

this unit integrates seamlessly with complex multi-stage HVAC systems

it must be installed in the correct flow direction (typically the cold inlet) to allow water to enter the tank while preventing thermal siphoning from the heat source

Direct OEM Fit: Serves as the factory-authorized Nordyne 664350R replacement for seamless installation

Siemens Combustion SQM40.215R11 Actuator 322057-301 this unit is built toThe Siemens SQM40. 215R11 Actuator is a heavy duty electromotoric component designed for the precise positioning of air and gas dampers or butterfly valves in industrial burner systems. Operating on a 110V 120V AC power supply, this model features a 0 135 Ohm resistive input signal, providing reliable modulating control for high turndown burner applications. Built with a robust NEMA 4 (IP66 equivalent) aluminum housing, it is engineered to withstand