What Makes Windows Energy Efficient?
There are many parts to a window, and in order to get one that has great energy efficiency, you'll want to look at a few different aspects. The material you choose for your replacement windows can make a big difference. You have a few options for the material of your windows including wood, fiberglass, and vinyl. When it comes to energy efficiency and value, vinyl windows are a great investment, and they have a great seal from framing to glass. Wood windows tend to be more easily damaged over time, but they do look fantastic. Fiberglass is another great long lasting, and durable choice, although it is, in general, a less common product.
You also want to consider the style of window that you choose. The more opening pieces to a window, the less energy efficient it is, although this difference is slight. With modern windows, when closed they still seal very well. Single hung windows, which only open on one end, for example, are a better choice for efficiency than double hung, which open on both top and bottom.
Perhaps the most important aspect to an energy efficient window is the glass. Untreated glass allows heat energy to pass through it relatively easily, which means fairly poor insulation. Replacement windows today, however, often have a Low-E coating, which works to reflect heat rather than absorb it. Features like Low-E coatings and double paned windows will affect your energy savings drastically.