MAINT. TUNE-UP FOR HEATING SYSTEM ON 2UNITS, 5YR, AND 12YR. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HEAT EXCHANGER, HIGH LIMIT CONTROL, ENERGY CONSUMPTION, HUMIDIFIER, FAN CONTROL, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. RENEWED SERVICE AGREEMENT ON BOTH UNITS.