What can you tell me about Krypton Filled Windows?


How much of a difference it would make to have argon gas or argon/krypton gases or just air between the panes? Does it matter what climate I live in?

I’d also like to know how well do the gases keep their insulation value? I mean, do the gases escape? If I spent more money on windows with the gases, would it be a waste of money in a couple years? Would significant rainfall affect the windows’ ability to keep their seal, thus allowing whatever’s between the panes to escape?

Homeowners looking to increase the energy-efficiency of their homes usually consider a number of different home renovation options, and one of the first places that they turn is to their exterior windows (Windows are THE major contributor to internal heat loss and external heat gain). For homeowners living in older homes, window replacement is usually a necessity, as the single-paned windows of old are virtually incapable of preventing the loss of hot or cold air that is characteristic of today’s energy efficient homes. These homeowners are sometimes shocked to learn that today’s energy-efficient windows are not only double-paned, but they are often times filled with something called Argon, or sometimes even Krypton.

With names reminiscent of the glowing green rocks that hurt Superman, many homeowners immediately steer clear of such futuristic home improvement options. However, far from the tools of comic book villains, these windows are some of the most energy-efficient available today, and are important considerations for homeowners undergoing a window replacement project.

Krypton and Argon are both elements found naturally in the Earth’s atmosphere. Everybody breathes these two gases on a daily basis, and they are both clear, odorless, non-reactive, and most importantly, non-toxic. While dry Nitrogen was used to fill windows in the years past, recently, window manufactures have begun inserting these two gases in the space between double and triple-paned windows to increase the efficiency of the windows. With Argon or Krypton filling the spaces between double and triple panes, less air from the outside will penetrate windows, altering the temperature inside of a climate-controlled home, and less air from the inside will escape out of the windows. Because Krypton and Argon are non-reactive and non-toxic, they pose absolutely no threat to homeowners should a window be broken and the gases escape into the home.

Argon is the more commonly used gas of the two, mostly due to the fact that Argon is more commonly found in the atmosphere, therefore much less expensive to harvest than Krypton. Argon makes up approximately one percent of the Earth’s atmosphere, and while it does not provide the same level of thermal (temperature) insulation as does Krypton, it actually provides more sound insulation, making Argon-filled double-pane windows virtually soundproof. Argon performs best in windows that have a little more space between the panes, usually ½ inch or more.

Krypton provides the best thermal insulation available in window insulation today, but tends to be very expensive. Usually found in windows with thinner spacing between panes, such as those found in triple-paned windows, Krypton is ideal for windows with spacing between ¼ inch and 3/8 inch. Many window manufactures will also recommend a blend of Krypton and Argon to fill the spaces between panes, giving homeowners a solution that blends the efficiency of Krypton with the cost savings of Argon.


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