Duct cleaning removes contaminants such as pollen, dirt, dust, and mold. These substances can cause allergy or asthma symptoms, fatigue, headaches or other health problems. Obstructions such as dust, dirt, cobwebs, and pest droppings reduce your HVAC system’s airflow. They also force it to work harder to get conditioned air to all the rooms in your home. Duct cleaning pays for itself over time through energy savings, and it can help prevent inconvenient and expensive breakdowns.