What does the term "loop" refer to in HVAC systems?

The term "loop" in HVAC systems specifically refers to a length of tube used for heat exchange. In various HVAC applications, particularly in hydronic heating and cooling systems or geothermal systems, a loop is installed to circulate fluid, which can be water or a special heat transfer liquid.

This loop allows for the transfer of heat energy between spaces or systems, either extracting heat from one area and conveying it to another or vice versa, depending on the heating or cooling needs. By using loops, HVAC systems can effectively manage temperature and enhance energy efficiency, as they often facilitate heat exchange processes that are critical for maintaining comfortable indoor environments.

Understanding the function of loops is essential for professionals in the field, as it directly impacts system performance, energy consumption, and overall efficiency.