Quality Refrigeration Services installed our heating system over 16 years ago, and our service technician Howard comes out ever fall to look at my humidifier. Lately we've been having trouble with the heat, so Howard has been out here constantly. He's very good. For three days we didn't have heat, but Howard kept coming and now we're hoping things are OK. I would recommend their service. My daughter uses them as well and they do a good job for her too.