Gilkey Windows Structural Performance:
Air Resistance

Airtightness is measured by applying 75 pascals of pressure – the equivalent of a steady 25 mph wind – to the outside of the window. Interior air infiltration is then measured in cubic feet per minute per foot of window joint.

Volume of Infiltration Window Type
0.002 cu. ft./min./joint ft. Gilkey fixed, casement and awning windows
0.086 cu. ft./min./joint ft. Gilkey sliding and hung windows
0.1 cu. ft./min./joint ft. High-end
0.3 cu. ft./min./joint ft. Mid-range
0.5 cu. ft./min./joint ft. Low-end
Air resistance in window structures
The results are from national tests under the following standards:
AAMA NWDA 1011.S2-97


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