Chimney Safety Institute of America (CSIA) Certification Practice Test

When cleaning a catalytic combustor, which tool should never be used?

1. Wire brush

2. Steel wool

3. Vacuum cleaner

4. Soft cloth

The correct answer is: Wire brush

When cleaning a catalytic combustor, the use of a wire brush is not advisable because it can damage the delicate surface of the combustor. Catalytic combustors are designed to promote efficient combustion by facilitating chemical reactions at specific temperatures, and they have a fragile matrix that can be scratched or compromised by abrasive tools. Using softer cleaning tools, such as a soft cloth, is recommended to gently remove ash or debris without risking harm to the surface. In contrast, while vacuum cleaners are often employed to clear out the system, and steel wool might seem like a cleaning option, the latter can also be abrasive and should be avoided. Therefore, opting for non-abrasive cleaning methods ensures the longevity and efficiency of the catalytic combustor.