Why do you need Air Duct & Dryer Vent Cleaning? Air ducts are like the respiratory system for your home’s HVAC unit. When not cleaned regularly, they can become filled with dust, pollen, mildew and other debris that can seriously degrade the air quality in your home. Furthermore, the more things that have the potential to block the airflow, the harder your HVAC has to work to heat or cool the house effectively. This puts tremendous strain on the HVAC itself, and results in higher monthly energy bills for you. Not only should you have your air ducts cleaned, but they should be sealed as well. A clean dry vent is vital to proper filtration of harmful air pollutants. Some of the most significant health issues associated with air pollution are asthma, cardiovascular diseases and cancer since air pollutants enter the bloodstream and diffuse critical organs such as the brain and the lungs. Similarly, there is a major risk of eutrophication and acidification of the ecosystem, therefore.