Duct cleaning has never been shown to actually prevent health problems. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space.

Whether air duct cleaning is worth the cost depends on your specific situation. If you're noticing signs that your air quality could be better, or it's been a long time since the last cleaning, it might be a wise investment. Remember, keeping your air ducts clean is part of maintaining a healthy, efficient home.

There will literally be less dust when you have clean ducts. The reason behind this is that air ducts that are clogged with debris blow the same dusty debris into every surface of your home, making it more time-consuming and demanding to clean your home. Once your ducts are clear, you simply won't have to dust as much.