What is the unit of pressure commonly used in refrigeration systems?

In refrigeration systems, the kilopascal is a standard unit of pressure commonly used in many applications, including HVAC and refrigeration. The reason it is preferred is due to its convenient scale for typical pressures encountered in these systems, which are often in the range of a few kilopascals to hundreds of kilopascals.

The use of kilopascals simplifies calculations and readings when dealing with pressures related to refrigerants, as many pressure gauges are calibrated in this unit. The metric system's compatibility with kilopascals also makes it a natural choice for professionals around the world, particularly in regions that favor the metric system over imperial units.

While other units of pressure like bars or pascals are also technically correct and sometimes used, they are less common in standard refrigeration practices. The atmosphere is another pressure unit, but it typically represents larger values than commonly encountered in refrigeration applications. Thus, the kilopascal stands out as the most practical and widely accepted unit used in the field.