CAME OUT ON A ESTIMATE FOR AIR DUCT CLEANING. INSTALL A AIR DUCT CLEANING SYSTEM. MADE SURE DUCTS WERE CLEAN. INSTALLED AN AIR DUCT CLEANING SYSTEM WAS INSTALLED PROPERLY. MADE SURE WORK AREA WAS CLEAN WHEN FINISH. CHECK THERMOSTAT, AIR FILTER, AND ALL ELECTRICAL CONNECTIONS. CUSTOMER OBTAIN A NEW SERVICE AGREEMENT.