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Glossary
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C
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D
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E
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F
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G
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H
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J
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K
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Q
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Infiltration
The
unintended penetration of outside air into a building. Forced
infiltration is prompted by wind. Stack-effect infiltration is
brought on by temperature-related buoyancy differentials between inside and
outside air.
Insolation
The
total amount of incident solar radiation (direct, diffuse, and reflected) reaching an
unit area of a surface.
Irradiance
The
amount of radiant flux incident upon a unit area of a surface.
I-P
units: Btu/h•ft2
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