With increasing costs of energy, one should focus on getting windows which save energy efficiency. The parameters that affect the energy saving of a window include its heat loss coefficient, solar heat gain coefficient and visible transmittance which are how much light can pass through the windows. For cold regions, the solar heat gain coefficient should be higher to preserve solar energy and hence cut on the heating costs. Reflecting and tinted windows don’t help the cause either. Inert gas filings and low-E coatings are applied to windows to ensure there is not much heat loss.

Fiberglass and composite frames are used because of their insulating properties replacing aluminum which is a good conductor of heat. The fiberglass frames are also foam filled as foam is a very bad conductor of heat. Glazed glass can also help reducing heating costs by preventing heat loss. Double pane and triple pane windows although expensive, are used to save on energy costs.

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