Williamson Heating & Cooling, Inc. is an HVAC contractor serving Northwest Indiana, South Chicagoland, IL, and the surrounding areas. Our HVAC contractors provide a variety of services for residents and businesses, and offers a 24-hour emergency service for when you need us most. Specializing in sales, maintenance and installation of new heating and air conditioning equipment, our services include: HVAC repairs and replacements, general maintenance on AC, air purifiers, furnaces, expert installation on most models, refrigerators, humidifiers, and water heaters. We've been family-owned and operated for more than 25 years. Call Williamson Heating & Cooling, Inc. today for your free estimate, and be sure to inquire about our 10-year parts and labor guarantee.