Pre-season preparation Air conditioning systems are regulated appliances, requiring expert maintenance to properly function at the best rate of energy consumption. Will your system be ready to handle this year's chill? Regular preventive maintenance, performed twice a year, can help your system keep up with seasonal temperature swings. Plus, it can increase HVAC performance and help you avoid costly emergency repairs—because no one wants to be left without heat in the middle of a snowstorm. While most newer heating systems require little maintenance, a quick tune-up can greatly extend the life of your HVAC equipment, ensuring it always runs at peak efficiency.