An IGU is a sealed assembly of two glass sheets with an intervening space and a spacer. The spacer creates a cavity between the two glass panes, which is filled with an insulating gas like argon. This design helps improve the energy efficiency of windows and reduces heat loss.

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An IGU Is

Question 18

Multiple Choice

An IGU is

A) a sealed assembly of two glass sheets with an intervening space.
B) an assembly of two glass sheets with an intervening space.
C) a sealed assembly of two glass sheets with an intervening space and a spacer.
D) an assembly of two glass sheets.
E) none of the above.

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