Kerry, our sales rep, was very knowledgeable. He explained why our old system failed, why we needed a new system, and which new system he recommended. Independent research confirmed Kerry was correct. Kathy, in the office, efficiently kept us in touch, and was very easy to talk to. Juan and Cesar, the installers, were polite, efficient, and neat. Mathis provided us access to funding for our project, and even loaned us a portable AC unit for the weekend. We highly recommend Mathis AIr and will use them for future maintenance.