At Naughton Heating & Air Conditioning in St. John, Indiana, we bring old time service into new age technology. We proudly serve Lake County in Indiana and Cook County in Illinois. We are family-owned and families trusted and strive to provide you with the kind of quality service you expect. We provide service to residential, commercial, and light industrial businesses. Some of our services include furnaces, air conditioners, humidifiers, hot water heaters, and boilers. We are licensed, bonded, and insured. Call today for a free estimate on new equipment.