This is a metering device found next to the evaporator coil inside the air handler. It controls the flow of refrigerant allowed to enter the evaporator coil. Using a sensing bulb, it will adjust the flow based on the temperature of the coil. It is necessary in high efficiency systems especially and allows for optimal efficiency.
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Pure Air Conditioning
2043 Trade Center Way Naples, FL 34109Phone: 239-597-7873