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Together, the QREV with the PSHC kit forms an electronically controlled expansion valve that will maximize evaporator efficiency. It allows users to capture energy savings by reaching targeted superheat faster and controlling the valve more precisely, through varying load conditions. This unique silicon-based MEMS technology eliminates valve wear. There are no stepper motor failures associated with this type of technology. The PSHC comes loaded with any one of 17 approved refrigerants for easy commissioning, plus it has an on-board pressure sensor. The wiring harness, which completes the kit, includes a temperature sensor. This new product combination is easy to install, precise, fast and reliable.