![]() Therefore, if the gap between panes must be reduced to 6–8 mm, such as when retrofitting IGUs into existing timber frame windows, argon gas-filled units should be used. Use of argon between glazing panes instead of air can reduce the amount of heat conducted across the gap and improve the R-value of the glazing by 5–20%.Īrgon also substantially improves the R-value of IGUs where the gap between the panes is narrower than the recommended 10 mm minimum. Heat transfer through windows can be reduced by using argon gas between the panes of double or triple glazing.Īrgon gas is a low-cost, clear, non-toxic, naturally occurring gas with a lower thermal conductance than air. The minimum spacing between glazing panes should ideally be 12 mm, but the gap can range between 10–16 mm. radiation – due to two or more panes interrupting the radiation of energy and the low emissivity when using a low-emissivity (low-E) surface.convection – due to the inability of the still air between the panes to move and transfer heat.conduction – due to the high thermal resistance of the air or gas in the space between glazing panes.Insulating glass units (IGUs) can have a significant effect on heat loss or gain, condensation, the transfer of noise, and other visual and aesthetic properties. Typical insulating glass unit construction ![]()
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