Current Specials FREE With Installation of A/C Unit With the installation of a Carrier Air Conditioner receive a FREE Ecobee 3 Smart Thermostat and an Aprilaire Media Air Cleaner Vacuum and Dust Less Often! Save an average of 23% annually on energy bills. Gas Mail-in Rebate MI Gas customers receive a $70 Mail-In Rebate & SEMCO Gas $50 upon the completion of their $129 furnace tune-up. Limited Time Only! Must provide copy of SEMCO bill at time of service. Available until Dec. 15, 2021. Call for details!