Emissivity is a measure of how much thermal energy such as sunlight or indoor heat is absorbed by or reflected away from a material. In the case of ordinary clear glass, emissivity is pretty high: The glass absorbs heat from the sun and transfers that heat through to the other side of the glass. By changing the types of particles used in the layers of Low-E, and by increasing or decreasing the number of layers, different Low-E glass types can be created that meet specific climate and project needs.
Low-E coatings can be applied to both the exterior and interior glass surfaces of a window or door and deliver comfort and energy savings in both directions.
On an exterior glass surface, a Low-E coating can reflect the heat of the summer sun or the cold of winter away from the home. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. My boss is trying to convince me that they are one in the same, despite my repeated attempts to differentiate the two for him.
At this point, I need help to prove it to him that there is an extreme difference. Low-E windows are designed with material inside the glass or layered on it at the time of manufacture. Argon Gas windows are multiple-pane windows that are air-tight with the gap between the panes filled with argon at assembly. It is possible to get windows that are both at once. Low-E ideally works to reflect the ultraviolet rays, reject infrared and keep your home cooler in a warmer climate.
Argon gas is an injected gas between the Panes of glass to help prevent cool air from penetrating in the winter. Argon gas is typically warranted in a colder climate.
A simple rule of thumb is Low-E is and should be standard in a southern, warm climate, and argon gas should be standard in a colder climate.
With all of that being said, it's become truly unfortunate and a market only for the extremely savvy. For those of you that are under the impression that you can purchase windows and feel confident in your decision without a hitch, you're likely in for a rude awakening. Many,many scam are perpetrated daily. Many examples, but I'll try to stick to the topic. Low-E , many companies claim that theirs is better than another companies. How so? Well, they claim their application and product performance is better.
What I've found repeatedly without fail is that they'll sell the consumer on something that sounds great, Low-E squared, or Low-E cubed, and it's passed off as better, because it rejects more heat. But in reality it's the equivalent of a rushed painting project. No one would ever paint an interior wall by applying 3 or 4 coats at once. You sand, prime, then apply your base coat until you're satisfied with how it's turned out. That's exactly the gimmick behind low-e squared and cubed that companies like Milgard use.
On to Argon Gas, is it necessary even in a cold climate? Sure, but only if you're truly getting a iron clad warranty on the stabilization and life of the argon gas. How it's injected, stabilized and where it's manufactured are all key. And that little extra cost can pay for itself with the money you'll save on utility bills!
Can you replace argon gas in Windows? If you send out a window professional for an inspection, he or she can gauge the current level of argon gas in your double-pane windows. If a substantial amount has been lost then there is a method to replace the gas between the panes of glass.
However, it may only be a short term solution. Can argon gas be added to existing Windows? Adding argon gas between the panes of glass adds increased insulation to the window. Combined, they offer excellent energy efficiency for your home.
A seal failure, though, will "oxidize" the low-E coating and argon gas, making the glass appear streaky or foggy. Technically, yes, gas could be added to the window. Do all low E windows have a green tint? Very slightly. Most people do not notice the color difference. Low-e products are faintly reflective and have a slight green tint. Look at a sample first to see if you like the color and visibility through the window.
Does argon gas in windows reduce noise? There's a certain amount of dead air space between the panes of glass in Soundproof Windows. When that space is filled with inert gasses like argon or kypton, it further insulates the Windows, protecting the interior from invasive noise and volatile temperature shifts.
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