Efficient HVAC is Indispensable and expected. The value of having a properly working HVAC system cannot be underestimated. Take the steps to ensure top performance with regular preventive maintenance. Some HVAC systems are often pushed beyond full capacity, sometimes for months at a time. Overlooking noises and signs of problems with HVAC is risky. Sudden breakdowns pose a risk to your budget and may ultimately increase the cost of repairs done on an emergency basis vs. routine service.