Which method can help identify creosote buildup in a chimney?

A visual inspection or using a camera is an effective method for identifying creosote buildup in a chimney because it allows for a direct assessment of the chimney's interior. Visually inspecting the flue can reveal the presence, thickness, and type of creosote accumulation, which is crucial for determining the need for cleaning and for ensuring safe operation of the chimney.

Using a camera, such as a digital inspection camera or a video camera, provides a clear view of hard-to-see areas within the chimney. This technology also assists in documenting the condition of the chimney over time, which can help in maintenance planning and identifying any structural issues.

Other methods, while useful for different analyses, do not specifically target creosote detection as effectively. For instance, employing a brush is mainly for cleaning rather than inspection, measuring temperature deals with assessing the performance and efficiency, and testing air pressure may relate to draft issues rather than the buildup of creosote itself. Therefore, a visual inspection or camera provides the most direct way to understand creosote buildup and assess chimney health.