Lennox 42W34 Valve Expansion Valve

The Lennox 42W34 Expansion Valve which is an essential part of the Lennox HVAC systems. This valve is made of brass and is rather small, only 3/8 Inches long by 1/2 Inch wide, but it is responsible for controlling the temperature in your building. This is facilitated by what scientists refer to as a metering device through which refrigerant circulation in the system is accurately regulated. Refrigerant is a high-pressure liquid that circulates inside the building and extracts heat then expels it outside.