Dr. Energy Saver Illinois is your prescription for lower energy bills® in Illinois, and for a more comfortable and healthier home. Contact us today to schedule your home energy audit or receive a service estimate for window replacement, home insulation, heating and cooling (HVAC), air sealing, attic insulation, ductwork, water heater installation. We proudly serve Saint Charles, Aurora, Naperville, Wheaton, Geneva, Carol Stream, Bloomingdale, Streamwood, Winfield, Dekalb, and surrounding areas!