I was looking for someone to do some maintenance on my tankless water heater. I purchased my home 6 years ago and never had it done. I don't know if the previous owner ever did it either. The technician, Yan came and did a great job and also walked me through some questions about ductless air conditioning installation that I was interested in. My waters gets hot a bit faster now. Matthew on the phone was very helpful, and friendly too. I would definitely recommend this company to people, and use them again.