Does Air Duct Cleaning Help Reduce Energy Costs?
Clean air ducts play a key role in maintaining efficient airflow throughout your home. Over time, dust, debris, and other buildup can restrict airflow and make your HVAC system work harder to heat or cool your space. This extra strain not only reduces performance but also increases your energy consumption and utility bills. Having your air ducts professionally cleaned can help improve efficiency, lower energy costs, and extend the lifespan of your system by ensuring that air moves freely through the vents.
https://www.angi.com/articles/air-duct-cleaning-can-save-energy.htm