Since the ducts are not visible unless you actually access them, it is somewhat difficult to asses the situation by yourself. But here are a few signs you need to call your duct pro:

1. If you haven’t change your air filters as required.
2. If the vent covers have visible dust marks.
3. If your AC unit has been working for a long time and the room doesn’t seem to get colder.
4. If the airflow coming out from the vent is low.

Dryer vents cleaning is a very important task that can prevent real damage and life threats. When your vent is not cleaned properly, it can cause overheating and eventually fire. This is why experts recommend cleaning your vents at least every year before the warmer seasons.

According to EPA (U.S Environmental Protection Agency), air ducts should be cleaned when they are clogged, which usually takes 3 to 5 years to build up. The best thing you can do is get a professional to inspect your air ducts.

Sometimes buying a new unit is the right choice for you. If you haven’t change your unit for many years, new technologies can probably improve performence. However, sometimes it would be cheaper and more efficient to get someone to inspect your ducts and vents and clean them for same results and lower costs.