Brian recently sealed all my ducts and today he did my furnace inspection. I was unaware that the humidifier was not connected to the thermostat and it was going on at odd times. Turns out it is very old and works on a manually controlled switch. I was wondering why I was getting mold on my windows when they were all steamed up in the winter. I tried lowering the switch but you have to adjust it everyday whereas the new ones take care of this automatically. I am glad I am getting this fixed.