Protect your heating system by keeping current on preventative maintenance. Set up annual preventive maintenance and tune-ups for your heating system with Platinum Air. Tune-ups provide the needed service to keep your heater at peak performance and efficiency. It will also reduce the need for costly breakdowns during the winter season. The most straightforward and most crucial DIY task is to change your HVAC filter every three months. This will maximize the airflow thru your heater system and minimize the strain on your system.