Making sure your gas and oil appliances receive maintenance every year ensure they are running as safely and efficiently as possible, and prevent small issues from becoming larger, costly issues. Book a preventative maintenance appointment to make sure that your furnace, water heater, fireplace, pool heater, or humidifier are working correctly, and don't have any issues. Annual inspections/tune-ups can identify small problems before they become big, costly problems. Be sure to change your air filter regularly, and get your appliances checked out every years.