Abstract
In the last 20 years, Variable Refrigerant Flow (VRF) systems have gained prominence in many sectors of U.S. construction. These devices move conditioned refrigerant from outdoor units through pipes to indoor units, serving areas that require heating or cooling. Advantages of a VRF system include eliminating the need to carry conditioned air through long runs of ductwork, allowing more environmental control in each space or zone served, and offering quieter operation levels. Indoor VRF system noise levels provided by manufacturers are often measured in anechoic conditions close to the unit, which is in contrast to the installed conditions in many buildings using VRF systems. We seek to explore the existing literature documenting VRF sound levels, while we compare and contrast these sound levels to field-installed VRF system measurements.
Published Version
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