When to Ventilate
Ventilating is important all year round. During the winter months, you should open your house at least once a day, no matter how bitterly cold it is outside. It doesn't have to be for long, opening a window or door for even just a few minutes will create a cross-draught. The old, damp air will exit your home and fresh air will return. It's also important to ventilate after you turn off your heating system. If you turn it off before leaving the house, or before going to bed, briefly open up a door or window to alleviate condensation. Lastly, if it's possible to keep a window in your bedroom just slightly open overnight, the air circulating your room will be more comfortable.