The glass is particularly important in terms of the energy-efficiency of windows, but the frame and sashes and the materials they are made from are also important. Qualified windows can save you energy and money, and increase your home comfort. Low-priced windows are a bad choice. Qualified windows provide savings, last long, and cost less in the long term. Old conventional windows lose large amounts of heat to the outside during the heating season and gain too unwanted heat during the cooling season. According to US DOE EERE over 25% of the heating and cooling energy bills in a typical home are due to inefficient windows. |