Goose Creek Roofing: Article About Understanding Replacement Window Labels
Any homeowner who has ever looked at replacement windows has probably been a little overwhelmed with the different numbers and labels attached to them. Although the labels are meant to help homeowners buy the best replacement windows for their home, the reality is that many homeowners are more confused than helped. There are coefficients and factors to be taken into consideration as well as other numbers that make no sense to the consumer on first glance. Fortunately, many Goose Creek roofing companies also install replacement windows and are happy to help homeowners choose the windows that are right for their homes.
Although participation in the Energy Star program is not required of manufacturers, the label has become a standard for consumers. Wise homeowners who want to purchase energy efficient windows do not necessarily have to know what the D.O.E. guidelines for receiving the label are. They only need to know that the Energy Star label is the basic requirement to be met by any window and not to purchase any window without it.
The NFRC label describes in detail how well a window functions in terms of its energy efficiency.
A roofing contractor from Lowcountry roofing of Goose Creek SC can answer any question about roof replacement or storm damage.
Understanding this label will empower homeowners to choose the right window for every room in the house no matter what direction it is facing or the climate of the home.
The U-factor describes the amount of heat that is transferred from the home's interior to the outside via the window. The lower the window's U-factor, the more resistant it is to heat flow. The number applies to the whole window, not just the glass. Homeowners should expect a quality double paned window to have a U-factor of about 0.30, while a quality triple paned window should have a U-factor of 0.15. According to this rating system, a hole in the wall would have a U-factor of 1.0, meaning that the hole in the wall has no ability to resist the flow of heat out of the room.
The Solar Heat Gain Coefficient describes how much of the sun's heat is transmitted through the window. A lower number means less energy wasted in cooling costs. On the other hand, in a cold climate, a window with a high SHGC might be a way to help offset indoor heating costs. The visible transmittance is the amount of natural light that a window allows into the home. High numbers mean that more light enters through the window. Air leakage measures how much air from outside the home will enter through the window. The lower the number, the less air will leak into the home via the window. An open window would have a rating of 1.