Improve the safety, security and comfort of your customers and staff while lowering energy costs with energy-efficient equipment upgrades. Ameren Illinois natural gas or electric customers are eligible to receive financial incentives to reduce the cost of energy-saving equipment upgrades. Incentives are available for LED lighting upgrades, HVAC equipment, commercial kitchen equipment, new construction projects, pool equipment and more. Listing Category: The Ameren Illinois Energy Efficiency Program offers financial incentives that can reduce the cost of energy-saving equipment upgrades.