Got a tankless hot water heater from Dwyer a couple of years ago. Works great. Came home one day, hot water is not quite up to speed. Next day, seems fine, then after a weekend away, come home at night to no hot water. Called Dwyer, and in a reasonable amount of time, they got it up and running with a temporary fix. Next, they diagnosed the issue got the necessary part and now we are back to fully operational. Always prompt, courteous & professional and much appreciated. They have taken care of a couple of houses for us (moved from one to another, transferred our maintenance contract), so we can make this claim, as to the consistency of the quality of their service, for several years now...