In addition to combustion analysis, which of the following is a verification test?

Temperature rise is a verification test used to ensure that a heating or cooling system is performing as designed. It involves measuring the difference in temperature between the supply air and the return air in a system, which helps in assessing the efficiency of the system and whether it is effectively transferring heat or cooling as intended.

In the context of system performance certification, temperature rise provides valuable information about the operational capability of heating or cooling equipment. For instance, if the temperature rise is lower than expected, it may indicate a problem with the system, such as inadequate airflow or an underperforming unit.

Other options, while they may relate to system performance, do not serve the same direct purpose. Humidity control pertains to the management of moisture levels in the air, sound levels refer to the noise produced by the system, and voltage drop relates to electrical performance. These factors are important for overall system operation, but they do not directly inform the verification of heating or cooling effectiveness like temperature rise does.