NATE Air Conditioning and Heat Pumps Practice Exam

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What heat quantity equals one ton of total cooling load on the evaporator?

7,500 Btuh
10,000 Btuh
12,000 Btuh
15,000 Btuh

The correct answer is: 12,000 Btuh

One ton of cooling load is defined as the amount of heat that must be removed to cancel out the heat added by the melting of one ton of ice in a 24-hour period. This is equivalent to removing 12,000 British thermal units (Btus) in one hour. Therefore, in the context of cooling capacity, one ton represents a cooling effect of 12,000 Btuh. This standard measurement is commonly used in the HVAC industry to quantify the capacity of air conditioning systems. Recognizing this value is essential for professionals in the field as it helps determine the appropriate system size needed for specific cooling demands. Properly sizing equipment based on these values ensures efficient operation and optimal comfort in conditioned spaces.