Do Low E Windows Save Energy?

A Picture of a Window with Three Large Panes of Glass.

Are Low E Windows Energy Efficient?

If you are looking for energy-efficient windows to replace your current windows, you might consider low E glass windows. But what does low E glass mean? Low E glass means windows that have a low emissivity, hence the name. These types of windows are able to reduce how much infrared and ultraviolet light can come through the window. Emissivity radiates energy, so low E glass windows are coated with metallic particles, which will be able to reflect unwanted energy from the windows. Because of what these types of windows can do, they are considered an energy-efficient window option. To learn more about low E windows and whether they are right for you, it’s important to contact a contractor who has knowledge of these kinds of windows.

Does Low E Glass Really Work?

When it comes to low E glass, there are a few factors that determine whether it is effective. Some of the factors that decide if low E glass is successful is the solar grain rating, solar heat gain coefficient, U-value, and the visible light transmittance. Also, the ratio between the solar grain rating to visible light transmittance needs to be considered. If all of these factors are sufficient, then the low E glass is effective. When looking for new low E windows, the low E glass window ratings you will want to pay attention to are the U-factor, visible transmittance, and solar heat gain coefficient. If you are still unsure if low E glass really works, then you should consider some of the benefits.

  • A decrease in UV Damage: If you are looking to protect the fabric on your couch, chairs, carpet, or wallpaper, you can do that with low E windows. The sun’s infrared and ultraviolet light can fade most fabrics, but investing in low E windows can prevent this from happening.
  • More Energy Efficiency: Because of the metallic coating that is used on low E windows, you can reduce heat gain in the summer, as well as heat loss in the winter.
  • Saves You Money: Low E glass is able to reduce heat gain and heat loss in the summer and the winter, so you are able to reduce your energy bills and save money in the process.
  • Extra Window Protection: Not only does the metallic coating protect against UV damage and offers more energy efficiency, but the coating acts as another layer of protection against dust, scratches, and water.

While it’s important to know about the benefits of low E windows, it’s also essential to know the problems with low e glass windows. The biggest downside you will find with these types of windows is that the upfront cost is more expensive. However, you need to factor in how much you will save on energy bills by investing in low E windows.

Low E Windows Vs Insulated Glass

We know that low E windows are windows that have a low emissivity, which is due to the metallic coating that is added to the pane of glass. However, there are other windows that are also energy-efficient that you might want to consider. There are insulated or double pane glass windows. This type of window is when two pieces of glass are installed together with space in between the two pieces of glass. The space is completely dry and airtight, so no condensation is unable to get through. Both of these windows are rated for solar heat gain coefficient, visible light transmittance, and the U-factor. The difference between these two is that low E windows require the metallic coating in order to be considered low E; without the coating, it’s just a regular window. Double pane windows will always be made of two panes of glass with space in between, but they can be tinted, clear, or have a low E coating. Depending on what you are looking for will determine if you go with double-pane or low E windows.

Are Energy Efficient Windows Worth It?

A Picture of a Window with Blinds.

Low E Glass Windows Cost

Many want to know if investing in energy-efficient windows is worth it and it depends on if you want to save money on energy costs. Sure the initial cost of energy-efficient windows like low E windows can be upwards of $800, but you have to think about how much you will end up saving in the long run. Another question that is asked when determining if low E windows are worth it is, “How long do low E windows last?” they will last 10 to 15 years, but that will depend on where the coating is applied and what type of climate you live in. If low E windows are something you are interested in, you will need to talk to a contractor or a roofer. A roofing contractor will be able to perform storm damage roof repair and other services such as installing new low E windows. For low E glass windows in Burnsville, MN, call Capital Construction! We offer exceptional residential roofing services and more. Contact us at 952-222-4004!