What formula can be used to estimate the horsepower required for an AC compressor?

The formula to estimate the horsepower required for an AC compressor is based on the cooling capacity expressed in BTUs (British Thermal Units). The correct approach involves dividing the BTU value by 2,545. This conversion factor relates to the efficiency of the refrigeration cycle and allows for the translation of the cooling capacity into horsepower, which is a measurement of the power required to perform work.

In the context of air conditioning, the BTU rating represents the amount of heat removed from the air in one hour, and the factor of 2,545 helps in determining how many horsepower of mechanical energy would be needed to achieve that cooling. This calculation is essential for sizing equipment appropriately and ensuring efficient operation.

Using 2,545 as a divisor allows for a standard conversion, enabling HVAC professionals to size compressors effectively for their intended application, which is crucial for both performance and energy efficiency. Hence, dividing the BTUs by 2,545 provides an accurate estimate of the horsepower required for the compressor in an air conditioning system.