Smart thermostats allow you to control your climate from anywhere by detecting your location via your phone or tablet. The thermostat automatically adjusts the temperature, saving energy and increasing comfort. Com Ed has a $100 rebate. https://www.comed.com/WaystoSave/ForYourHome/Pages/RebatesDiscounts.aspx
North Shore Gas, Nicor Gas and Com Ed have home energy rebates for thermostats, furnaces, boilers, water heaters and more https://kennaheatcool.com/rebates-loans/smart-wi-fi-enable-thermostats/