Ameren Illinois' Act On Energy program offers rebates on insulation and air sealing work up to $5,000 for qualifying customers. There are also rebates available for new high efficient heating and cooling equipment. Depending on the efficiency of the new equipment you have installed, your discount could be as high as $200 for a new high-efficiency gas furnace, $500 for a gas boiler, and up to $600 for a new high-efficiency cooling unit. Learn about this and other savings opportunities here.