Argon is the gas most often used between panes in a double- or triple-glazed window. The gas is colorless and odorless, says Bill Lingnell, head of Lingnell Consulting Services in Rockwall, Texas, an independent consultant who works with the Insulating Glass Manufacturers Alliance (IGMA). Argon is denser than the atmosphere, providing more thermal efficiency than having air between the panes, he explains.
About 1.28% of the air we breathe is Argon gas, and it is the third most common gas in our atmosphere. It is one of the noble gases, and is inflammable. It is colorless, odorless and completely non-toxic as a solid, liquid, and of course a gas. Argon is completely harmless unless there is so much of it that it replaces all the oxygen in the atmosphere. If an Argon gas filled glass unit breaks, there is no danger whatsoever from the gas.
What Do Filled Windows Offer?
Added energy efficiency is the key benefit to having gas-filled windows. The gas acts as an insulator, working in both summer and winter to keep interiors protected from outside temperatures. Typically, gas infusion is provided in conjunction with applying a low-emissivity (low-E) coating film to the glass panes.
Another key advantage is making your home more comfortable. The low-E coating and gas keep the interior pane of glass closer to the temperatures of the interior air, minimizing air currents that are created when different temperatures come into contact. This reduces drafts and cold spots.