Which of the following tests is NOT part of the BPI protocol when changes to heating systems are made?

The correct response identifies ambient temperature measurement in the living space as not being a part of the Building Performance Institute (BPI) protocol when changes to heating systems are made. The BPI protocol focuses on ensuring safe and efficient operation of heating systems and includes tests that directly evaluate combustion products, airflow, and venting efficiency.

Carbon monoxide measurement at each appliance, draft measurement, and spillage evaluation for vented appliances are critical in assessing the safety and performance of heating systems, as they directly relate to the integrity of combustion processes and potential hazards. Ambient temperature measurement, while useful in understanding the overall comfort of a living space, does not impact the immediate safety and performance assessments required following changes to a heating system. Thus, it is not a required test in this specific context.