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New Zealand: the trick is getting the argon between the panes

Air has commonly been used between the panes of double-glazing because of its low conductive properties. But minute air currents tend to carry warmer air to the top of the sealed unit and cause cold p…

Air has commonly been used between the panes of double-glazing because of its low conductive properties. But minute air currents tend to carry warmer air to the top of the sealed unit and cause cold pools to settle at the bottom. Less conductive and more viscous, argon gas is thus slower moving and minimizes the convection currents. Conduction through the gas is reduced, so heat transfer between the panes and hence through the window is cut. If the window is broken and the gas escapes, people have nothing to fear from the argon gas released. Argon is a gas which occurs naturally in the atmosphere. It is chosen for double-glazing because it is inert, non-toxic, non-corrosive, non-reactive, sunlight-stable, clear, odourless and comparatively inexpensive. Its optimal spacing between glass panes is the same as air. Argon has a low diffusion rate, which is critical because it must not diffuse through the window“s seals. The trick is getting the gas into the space between panes. That is where GlassTech“s new European machinery comes in. In a clever, high-tech process developed over many years, the gas is pumped into the double-glazing unit and sealed against escape. As with regular double-glazing, the secret is in the quality of the materials used, the production line and the manufacturer“s expertise. GlassTech has become widely respected as a supplier of high-quality double-glazing. The technology of argon gas filling is sound. Pioneered in the world“s coolest climates, it has been introduced to New Zealand by GlassTech.

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