Guardian Heating & Cooling Service

For over 25 years, Guardian Heating & Cooling Service has been the trusted HVAC provider for Chicago homes and businesses. Located at 5850 N Northwest Hwy, our NATE-certified technicians deliver expert heating and air conditioning repair, maintenance, and installation. We service all brands and provide 24/7 emergency repairs to ensure your comfort year-round. Our comprehensive services include furnace and air conditioner tune-ups, new system installations, and indoor air quality solutions like air duct cleaning and humidifier installation. We are a Lennox Premier Dealer, offering high-efficiency systems. Choose Guardian for reliable, upfront service backed by a 100% satisfaction guarantee.