Openings in side walls that let light and a cooling flow of air into the central interior space are called: <u>ventilation or infiltration</u>.
Ventilation brings fresh air from outside into a structure or space and distributes it there.
Flow of air inside a structure and air exchange with the outside, whether planned or inadvertent, are referred to as ventilation and infiltration, respectively. They are both crucial factors to take into account when designing healthy buildings that also reduce heat loss.
Infiltration results in heat loss during the winter because warm inside air is replaced by cooler outside air. Energy expenses will rise as a result of the heating system operating longer and more frequently. As more humid air is brought in from the outside during the summer, infiltration might potentially result in mould conditions.
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They hold powerful positions and can get others to do what they want
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has become fashionable in some circles to run down post-apartheid South Africa. This occurs not only in those sections of the media that believe African success is a contradiction in terms but also, more surprisingly, in quarters that strongly supported our transition to democracy and drive towards social justice. The Guardian's columns have not been exempt from criticism: Chris McGreal delivered some intemperate parting shots when he finished a 12-year stint as a southern Africa correspondent. We take such criticism seriously, but also find it inadequately based in fact and reality.
Take HIV/Aids. The latest survey by South Africa's human sciences research council confirms a UNAids report that shows falling levels of HIV infection among young South Africans. Prevention messages about condom use, abstinence and faithfulness are being taken to heart, especially by young people.
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