I have tried to call and leave messages for this company with no response. The unit was installed incorrectly with improper gas line work. There is a gas line leak at the fireplace and I cannot run the unit. Mike does not respond or care about his customers... He took the money and ran... Typical buyer beware situation. Do not trust this company if you are worried for the health or safety of your family. I have to now pay for another company to fix the mess that mike made in my home.