Window Convection

At hansons we take great pride in providing our customers with the service and information they need to understand and care for the products they have purchased. We are always available to assist you, and we want to provide you the best customer service available. The following information is designed to address some common questions and concerns.

Drafts vs. Convection: There is a Difference

Convection
However, windows may seem “drafty” for another reason; namely a process known in physics as convection. Convection can lead you to believe that your windows are drafty. Convection occurs when air gives up its heat to the cooler glass and sinks towards the floor. This movement sucks new, warmer air toward the glass that is in turn cooled, creating a draft. What you are actually experiencing is the process of warm air forcing colder air to move due to differing density properties. Heated air circulates through the home. When it reaches window glass it effectively pushes the existing cold air off of the glass.

This is an easy experiment and example of how convection works: Fill a glass with ice and water. Let it stand for about ten minutes. When you return, place your hands around (but not touching) the glass. You will feel cold air on your hands as warm air pushes it away from the glass surface.

Convection is actually proof that your new windows are working well and energy efficient.

Leave your blinds or window treatments open about a ¼ inch, so that heated air can reach the glass.

Make sure that your heat register exchanges are not obstructed by couches or other furnishings.

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