In fenestration, we often hear the term "Low E Argon". Of course, it is obvious that this feature of the thermo makes a difference, but do you really understand the effect of it on your home environment? Here are some explanations.
"Low E Argon" is a combination of "Low E" and Argon. The "Low E" is a fine low emissivity metal oxide layer deposited on the glass, while Argon is an inert gas produced naturally by the environment that is introduced between the two panes of the window to replace the air. It is non-reactive and is known for being a good insulator.
It is important to know that there are two types of infrared rays, short infrared rays and long infrared rays. Sunlight contains short infrared rays. When they come in contact with the ground or objects, they turn into long infrared rays, which we feel as heat. The Low E is in some ways an infrared filter. Indeed, in the winter it lets the short infrared rays (the sun) come into your property, but blocks the long infrared rays, which is why the glass has the ability to let heat come in and as well as maximum sunlight while avoiding heat loss. Conversely, in summer, the sun angle ensures that the rays strike the ground before reaching the glazing, which has the effect of preventing the heat from coming into your house.
Not only in winter does your house remains warm while enjoying the brightness and warmth of the sun, but in addition, the summer heat is blocked by the glass and allows us to stay cool. Combined with the insulation provided by Argon gas, the ‘Low E ‘ feature creates an energy efficient window. The mention ‘Low E Argon’ is an indicator of a window suited for our canadian climates.