U-Value
(See thermal transmittance (“U”-Value))
Continue reading →main-glossary
unadapted person (visitor)
[ISO 16814:2008, 2.43]:person entering a space from another area with acceptable perceived IAQ whose sensory perception has yet to become desensitized to some air constituents (such as body odours) in the space.
Continue reading →uniform mixing
[AIVC, Air infiltration and ventilation glossary, 1992]:the combining of two or more substances such that the parts of one are wholly distributed throughout the parts of another.3.10
Continue reading →unintentional opening
[AIVC, Air infiltration and ventilation glossary, 1992]:(see adventitious opening; fortuitous opening)
Continue reading →unit pressure
(See pressure, unit)
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