About Keystone Heating & Air Conditioning Co., Inc Serving the Racine area since 1918, Keystone Heating & Air Conditioning Co., Inc brings over 100 years of heating and cooling expertise to keep homeowners comfortable year round. Our 12-person staff is available 24 hours a day, fully trained on the latest HVAC products, maintenance and technology. We also offer same-day service. The result: we provide our customers with the best products and service in the Racine area. That starts with a wide range of state-of-the-art Lennox® HVAC products that combine a history of quality craftsmanship with innovative technology. Keystone Heating & Air Conditioning Co., Inc stands behind these innovative products. We will always work with you to find heating and cooling solutions that are both energy efficient and budget friendly to meet your home-comfort needs. Our commitment to customers goes beyond the sale and into the community. We’re proud to participate in Lennox “Feel the Love” (formerly “Heat U.P. Wisconsin”). As part of this program, Keystone Heating & Air Conditioning Co., Inc will identify local families in needs and donate a new, high-efficiency Lennox furnace, including installation materials and labor. Lennox Industries donates up to 100 furnaces through the “Feel the Love” program. Learn more here. We’re committed to your whole-home comfort. From performing repairs and maintenance to installing a full replacement HVAC system, we’re ready to help. Call Keystone Heating & Air Conditioning Co., Inc in Racine at 262-358-9468 or schedule an appointment online to get started.