[bigmac]

A lot of the condensation you may experience on the windows is caused by not only the indoor humidity from the tanks; but it also has to do with your humidifier on your furnace. A lot of people don't realize that when the temperature dips outside you are supposed to be adjusting your humidifier downwards as well. Interior humidity will always form as condensation on the coldest surface of your house when it's cold outside; which will always be the windows. It also doesn't help that most builders don't educate their clients about better glass options (Lowe and triple pane). Changing your windows to triple pane and energy efficient Lowe (preferably solar control) will make a huge difference.