Energy Efficient House Windows

Here are the essential features of energy efficient house windows.

Ratings For Energy efficient House Windows

Energy efficient house windows have ratings ratings to help you find fantastic windows for your home. These ratings can be difficult to understand because they are overly technical. But you have to know enough about the energy ratings to be able to compare the different types of replacement glass.

Choosing Glass For Energy efficient House Windows

Ask your contractor for advice to help you choose your replacement window frames and glass. Your budget and your climate will limit your options, but there are still many more choices to choose from. If you are looking for replacement glass that has a high efficiency rating, here is what to look for. If you are in search of some of the highest rated, look for Energy Star certified windows, which are certified efficient by the Department of Energy.

The R-Value
R-values are a measurement of energy efficiency. A higher R-value means that windows have a slower rate of heat transfer, which means less heat loss. A bigger R-value is better, and windows typically have R-values between 1 and 5. If one of your priorities is energy efficiency, you should choose the window with the best R-value and still falls within your budget.

The U-Values
U-values are another measure of energy efficiency. They measure the amount of heat loss that your windows are capable of preventing. U-values are the opposite of R-values, meaning that with a U-value you want to get as low of a number as possible. A lower U-value means that you lose less air through the replacement window frames.


The Solar Heat Gain Coefficient
This coefficient is something to really consider if you live in a really warm climate. The solar heat gain coefficient is a measure of how much heat is conducted through your window due to intense sunlight. A lower coefficient means less heat gain.

UV Penetration
You should also be worried about the Solar UV penetration if you live someplace with a lot of sunlight. Strong sunlight will cause things in your room to fade, which is caused by the UV light. Fortunately, there are windows that have coatings to block UV light. A lower percentage of UV transmittance means that your home blocks out more harmful UV light.

Energy efficiency depends on many factors, but the two most important factors are the R-value and the U-value. Other factors, like the solar heat gain co-efficient may be important depending on the climate you live in. Ultimately, you should choose replacement window frames and glass panes that are within your budget, but also have high energy efficiency ratings.