What tool can be used to check for air leaks around doors and windows?

Using a smoke pencil or thermal scanner is an effective method to check for air leaks around doors and windows. A smoke pencil produces a small stream of smoke that can visibly show air movement, revealing leaks where air is escaping or entering the building. This visual cue makes it easier to identify gaps or cracks that might not be immediately apparent.

Thermal scanners, on the other hand, use infrared technology to detect temperature differences around windows and doors. By identifying colder areas where there is heat loss, inspectors can pinpoint where air leaks may be occurring. This method provides a non-invasive way to assess insulation effectiveness and air sealing.

The other tools mentioned, such as the laser level or measuring tape, are typically used for aligning and measuring distances rather than detecting air movement. Similarly, a moisture meter or humidity gauge measures moisture levels in materials and air but does not provide direct information on air leakage. Lastly, a thermometer or barometer is primarily for measuring temperature or atmospheric pressure, and does not serve the purpose of identifying air leaks around openings.