Preventive Maintenance = $avings! Preferred Maintenance Service Agreements and agreements between you and EverCool Heating and Cooling, Inc. for scheduled inspections and preventive maintenace of your heating, ventilation, and air conditioning systems. Preventive Maintenance Schedule Preferred Maintenance Service Agreements are generally scheduled every six months to maintain peak efficiency, prevent utility overpayment, and avert system failures through predictive maintenance that help extend the life of your HVAC equipment. What's your bottom line? Savings: Preferred Maintenance Service Agreements typically more than pay for themselves through higher efficiency, less utility overpayment. Priority Service: EverCool customers with a Preferred Maintenance Service Agreement Receive priority service. Peace of Mind: Preventive Maintenance will mean fewer system failures and a longer life for your HVAC equipment.