After discovering a water leak in our basement, tracked it to the humidifier on a heater we installed in March of this year. Called Elm and they had Jeff C. come out the same day. They did not think he could be there before late in the day, but he was able to come within a few hours and fixed the problem without having to perform serious structural work to the foundation. He had it fixed in no time. Fast, efficient work. We use and will continue to use Elm and definitely recommend them.