What is the formula to find the capacity of a heat pump?

The correct answer emphasizes the relationship between capacity, heat transfer rate, and efficiency in a heat pump system. In HVAC applications, the capacity of a heat pump is indeed expressed as the product of the heat transfer rate and the system's efficiency.

When a heat pump is functioning, it moves heat from one location to another. The heat transfer rate indicates how much heat energy is being transferred, while efficiency defines how effectively the heat pump converts electrical energy into heat transfer. Therefore, multiplying these two values gives you the total capacity, effectively representing the actual productive output of the heat pump system in terms of heating or cooling capacity.

This understanding is fundamental, as it allows HVAC professionals to determine how well a heat pump can meet the heating or cooling requirements of a space, taking both its design and operational efficiency into account.