This is the second time I've used Mark to do work in my house. The humidifiers I had before did not work at all and the humidity in my house never rose above 25%. My wood floors were drying out and there were large gaps between boards. Mark recommended steam humidifiers. As he did when he did the work to complete my in-floor heating system, mark did the work while I was on vacation. I'm very satisfied with the result. My floors are back to normal and the humidity in the house is exactly where we want it to be.