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Fresh air

Occupied spaces need a supply of outside air to provide oxygen, remove carbon dioxide during respiration, and weaken the body smells. Values of local rules and often call for 6-8 l/s per occupant. Building, as a rule, you also have mechanical ventilation in the toilet and some services sectors, therefore, the supply of fresh air must compensate for this loss, together with the provision of a small overpressure, as the building from the ingress of dust...
 
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