We have been clients of Air Factor (now Air & Water Factor) for several years. They have done all of our A/C and heating maintenance and we haven't had any problems with any of their work or their technicians. They all know what their products can do and will advise as needed. In April 2014, we bought a brand new A/C unit and Tim was very knowledgeable and friendly. He explained the benefits of each system in terms we could understand and we never felt like we were getting a "sales pitch". Our tech, Chris, has also been very helpful and friendly. He's been on time and thorough.