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Measurements and Measures

Related to Energy Eﬃciency

in Ventilation

Energy in buildings

Energy uses and indoor environment quality

Energy is used in buildings for many purposes such as:

heating and cooling;

drying and humidifying;

ventilation (moving the air);

hot water supply;

lighting;

building systems such as lifts, escalators, communication networks;

cooking, washing, leisure, producing goods and services.

According to the Rio Decla ration, sustainable buildings should take account of

environmental, economical and social factors. This includes, among others, low

energy use, good indoor environment quality and health. The three factors have

equal importance: a building cannot be good if it fails in one of them. Ventila-

tion plays a large role in these issues by ensuring a good indoor air quality. In

mechanically ventilated buildings, ventilation uses energy to move the air and,

in many cases, to condition it.

In some case, especially when appropriate studies are not performed, there

may be a conﬂict between strategies to reduce energy use and to improve

indoor env ironment quality. However, studies and existing high performance

buildings show that it is possible to realize healthy, comfortable and energy

eﬃcient buildings. Basic recommendations to reach these objectives are

(Roulet, 2004):

Prefer passive methods to active ones wherever possible.

Think about user comfort, needs and behaviour.

Adapt the building and its systems to its environment.

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Sharp JX-9400 Informazioni Techniche Pagina 98