I called John to come over to my house and check on the heating unit, since my home is now 10 years old. He dumbed it down for me and explained different parts and aspects of each unit. He was professional, quick, and efficient. All of his employees go through background checks too. (HVAC is the most common trade learned in prison.) Finally, his company has a maintenance program for air conditioning units which puts those customers at the top of the service list if a unit malfunction during the upcoming summer months. His program is better than what I'd get from any home warranty company. I strongly recommend AMI for your HVAC needs.