Discussion
In a variable refrigerant flow (VRE) system, what allows the system to simultaneously provide heating and cooling to different zones in a building?
Answer: A
Heat recovery technology allows a variable refrigerant flow system to give heating and cooling to different zones at the same time. In a heat recovery VRF system the heat removed from the zones that need cooling is moved to the zones that need heating, and this is done through refrigerant circuits, with three pipes in many models. Split type compressors, variable speed fans and dual thermostat control do not give the simultaneous heating and cooling by themselves.
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