“Did you know as much as half of your household energy use goes to heating and cooling? Airflow problems can reduce your HVAC system’s efficiency by up to 15% and contribute to carbon pollution. In fact, dirt and neglect are the top causes of heating and cooling system inefficiency and failure. Check out EPA’s A Guide to Energy-Efficient Heating and Cooling for more to learn how to keep your HVAC system clean and efficient. More tips: http://www.epa.gov/earthday/actonclimate/.”