Nate Core Practice Test 2025 – Comprehensive Exam Prep

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What does “tonnage” refer to in an HVAC system?

The noise produced by the system

The cooling capacity of the system

Tonnage in the context of an HVAC system specifically refers to the cooling capacity of the system. This term originated from the amount of heat that is required to melt one ton of ice in a 24-hour period, which is equivalent to 12,000 British Thermal Units (BTUs) per hour. Thus, when discussing an air conditioning unit, the tonnage reflects its ability to remove heat from a space, making it a crucial factor in determining whether the system is suitable for the size and cooling demand of a given area. A higher tonnage indicates a greater cooling capacity, allowing the system to effectively manage larger spaces or higher heat loads.

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The cost of operating the system

The size of the unit

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