How is cooling capacity typically expressed in HVAC systems?

Cooling capacity in HVAC systems is typically expressed in tons. This measurement reflects the system's ability to remove heat from a space over a specified period. One ton of cooling capacity is defined as the ability to remove 12,000 British Thermal Units (BTUs) of heat per hour.

Using tons as a measurement is practical because it establishes a standard that simplifies the comparison of cooling systems' effectiveness. This unit of measure is widely recognized in the industry, making it easier for professionals to communicate system capabilities and for consumers to understand their cooling needs.

Other units of measurement, such as liters, cubic feet, and gallons, are more relevant to volume and fluid measurement rather than the thermal performance of HVAC systems, which is why they are not suitable for expressing cooling capacity.