About Jett’s Heating & Air Inc. If you’re looking for heating and cooling services or expertise in Crystal Lake, look no further than Jett’s Heating & Air Inc. We’ve been around since 2004, and our staff is knowledgeable and fully trained on a full range of HVAC products, maintenance, technology – you name it. We thrive to give comfort while providing the best quality service, which is why we offer a four-hour response time and a live service rep to answer your calls 24/7. Aside from offering excellent service, we also offer a wide range of high technology and innovative Lennox® HVAC products. If you’ve heard the Lennox name before, you probably know about its dedication to creating quality equipment through continuous innovation. When you work with Jett’s Heating & Air Inc., you’ll find products that may be more efficient and could even help reduce your utility costs. We’re proud to do business in the Crystal Lake area, so we sponsor a number of local sports teams and organizations. We have also helped raise nearly $500,000 for local families in McHenry County through local charities. Your comfort is our #1 care. Whether you need heating and cooling services such as repair and maintenance, or you need to replace your HVAC system, we’re ready to help. Call Jett’s Heating & Air Inc. in Crystal Lake at 815-459-4700 to learn more, or schedule an appointment online to start working with us.