What happens if duct sizing is incorrect?

When duct sizing is incorrect, it can lead to increased energy loss and discomfort within the building. Proper duct sizing is crucial for ensuring that the HVAC system operates efficiently. If the ducts are too small, the system must work harder to push air through, which leads to higher energy consumption and can cause increased wear on the equipment. This can result in hot or cold spots in the building, leading to discomfort for occupants.

On the other hand, larger ducts can lead to energy inefficiencies as well, as they may provide too much air to certain areas, resulting in ineffective heating or cooling. Thus, the right size ducts are essential for achieving optimal airflow, maintaining comfort levels, and minimizing energy waste, which underscores why the correct answer focuses on increased energy loss and discomfort.