Condensation occurs when gas or vapors change into liquids. This can occur when the outside cold air comes into contact with your warm window. The cold air will change into a liquid on your window. Condensation can be a problem in the winter and can come at a cost on your heating bill.
How to prevent Window Condensation:
A good way to tell if you have condensation is if you are noticing mold. Mold is the first indication that you are getting poor air circulation. If you notice this then it is time to install better ventilation, one that will go throughout the entire house. Condensation can occur where stagnant air is, increasing your ventilation will stop this problem.
If you have been reading several articles you will start to notice a theme. That theme is the importance of glaze on your windows. A single layer of glaze will lead to condensation, applying a second coat is the solution that you are looking for. It is important however to leave some windows unglazed for ventilation.
Other Options:
What else can you do besides glazing your windows? You can add such things as dehumidifiers to your heating systems as well as putting in an exhaust fan. Several times the problem lies in that there is a blockage in your heating system. If you think that this is the case contact of professional for investigation. This is often a very simple cheap way to improve your electric bill.