Performing semiannual air conditioning maintenance tune-ups on wo Tempstar AC systems in a residential home. Programming thermostat, checking air filters, testing safety controls/detectors, balancing airflow, assessing ductwork, taking vital readings, and evaluating HVAC system performance. Installing Turbo 200 condenser, compressor saver, Sanuvox Saber Pro UV treatment system, and UV bulb. System is cooling and ready for Summer weather.