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Fig. 1.<br />

How to use ventilation in residential buildings.<br />

Basic ventilation is always on, forcing<br />

is due to occupancy, cooking etc. Airing only<br />

for extra need or exceptional loads.<br />

Fig. 2.<br />

Use of ventilation in offices.<br />

Minimum = continuous exhaustfrom toilets etc.<br />

Basic = ventilation due to expected occupancy<br />

(Variable if demand-controlled) forced = extra<br />

ventilation due to thermal loads .

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