Keeping your HVAC system in good condition is essential for a healthy and efficient home. To ensure that your ducts are in good condition, you should use a device to detect any movement inside the ducts. Additionally, you can turn on the air conditioning system and look for air leaks around all air duct connections. To increase sensitivity when detecting air leaks, you can try getting your hand a little wet.
You can also check for leaks with an incense stick or a thin piece of toilet paper; if the paper sticks together or flies out of an area where two pieces of metal are attached, it means you have an escape. To further check for air leaks, you can use a smoke pencil or aerosol smoke test. This method involves spraying a small amount of smoke into the ducts and then looking for any smoke that escapes from the ducts. If you find any smoke escaping, it means there is an air leak. You can also use a digital manometer to measure the pressure inside the ducts and compare it to the outside pressure.
If there is a difference in pressure, it could indicate an air leak. Finally, you can use an infrared camera to detect any temperature differences in the ducts. If there is a difference in temperature between two areas, it could indicate an air leak. It is important to regularly check your ductwork for air leaks to ensure that your HVAC system is running efficiently and safely.