Referals from friends aside, it is generally not easy to find good, competent service. For this job we were very lucky when we located McMaster on the Carrier web site and later in a newspaper ad. We liked the equipment and what it is designed to do. We really liked the salesman who called on us and explained all of the systems details. The installation went smoothly and the three installers were knowledgeable about the equipment and its installation, they were very professional, and, even though they had to make some modifications on the fly, they finished in one day. We are very pleased with our new system and happy that we had McMaster do the job.