Pilkington Marketing Thin Vacuum Sealed IG

This apartment building in Kuzuha used Spacia IG units.

Spacia, developed and manufactured by Nippon Sheet Glass in Japan, is a sealed, vacuum insulating glass unit that provides higher thermal insulation than a conventional IG unit, four times the insulation of single-pane glass in a 6-mm profile, according to the supplier. It can have a center-of-glass u-value as low as 0.2 Btu/hr.sqft.ºF.

Nippon Sheet Glass first commercialized this glazing technology in 1996 and has been marketing it in Asia and Europe. Pilkington is now offering the product in North America.

Spacia uses low-E glass and a very thin vacuum space to achieve its thermal performance. The 0.2-mm vacuum gap minimizes heat flow due to the conductance and convection between the two lites of glass, while the low-E restricts the radiation heat flow.

Its overall profile (6 mm) is designed for greater design flexibility. The ability to retrofit the glazing system into an existing frame allows a designer not only to improve the overall performance of the building, but also maintain the original look and aesthetics. This combination makes it an ideal choice for the restoration of historical buildings.

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