New,
energy-efficient windows are tightly constructed and filled with insulating gases—kind of like a see-through sandwich. A sandwich that can boost your home's energy efficiency, lower your energy bill, and be gentler on the earth, that is. (Hold the mayo.) Getting
energy-efficient windows can raise your home's resale value and shield your sofa from sun damage, too. One Hohmie who recently did so had this rave review: "The new windows have drastically affected the cost and comfort level of our house. They've evened out the
temperature in the house and it costs significantly less to heat." It's true—
Energy Star windows can shave up to 15 percent off of heating and cooling bills!
There are different flavors of energy-efficient windows, such as double or triple pane, very low solar gain low-E or insulating low-E windows, and argon gas windows. Low-emissivity, or low-E windows have a microscopically thin, almost transparent coating of metal between anti-reflective metal oxide layers on the glass surface. Low-E windows block infrared and UV rays while letting sunlight into the room, keeping heat inside in winter and reflecting it during summer. As for double pane windows, those with argon gas between them help insulate your home because argon is heavier than air. Installing energy-efficient windows can result in a more temperate house and lower heating bills.
1. Determine how many and which type of your windows need to be replaced. If costs are tight, replace a few at a time instead of all of them, or consider
caulking or weatherstripping.
2. To window-shop (heh!), go to a hardware or window store or shop online. You can buy windows from a hardware or window store and have them professionally installed, or you can buy them through the same company that installs them for you.
3. Arrange to have your new energy-efficient windows professionally installed so they're installed correctly and so their warranty isn't voided. Installation costs vary based on how many and what type of windows and your house type.
4. Before the window installers descend, take down curtains or blinds, move furniture away from windows, and cover TVs and other electronics. Make sure your driveway or garage is clear so installers can park as close to your home as possible.
Tax credits for energy-efficient windows. Certain energy-efficient windows and other products are eligible for a tax credit up to $1,500 under the American Recovery & Reinvestment Act of 2009; they must be purchased by the end of 2010. For more information, visit the
Federal Tax Credits for Energy Efficiency website.
Check the window's U-value. U-values measure the rate of heat transfer through a window (lower is better).
Make sure windows are properly installed. Even the most efficient windows can only save energy if properly installed in tight-fitting, non-heat-conducting frames. Make sure trained professionals properly install your windows according to manufacturer instructions.