Here at CityLine Air Conditioning, we provide residents and business owners in Dallas, TX and the surrounding area with exceptional air conditioning and heating services. We are family owned and operated, we've been doing business in Texas since 2005, our technicians are professionally trained & certified, and we offer a 100% satisfaction guarantee on all of the work that we do. Give us a call today to learn more about how we can help you achieve maximum comfort in your home or commercial space. CityLine Air Conditioning: Comfort. From our family to yours.