Ventilation
Ventilation (Latin ventilatio – airing) in hygiene:
- Exchange of air of limited space for the purified or outside air;
- Adjustable air exchange indoors for maintenance in it necessary technological and/or hygienic parameters of air.
Types of ventilation:
- Exhaust – the mechanical ventilation which is carried out by means of extension from the room of the contaminated fulfilled air with formation of depression thanks to which receipt outside of clean air through windows, a door, a thinness in barriers or air vents is carried out;
- Exhaust local – the exhaust ventilation at which suction of air is made from those sites of the room where, mainly, there is its pollution, that is the sources located close emitting harmful substances;
- Natural – caused by movement of air in rooms through windows, doors, thinnesses in the protecting designs and so forth, as a result of a difference of air temperatures outside of and in rooms, and a wind pressure;
- Combined – is a combination in one room of local and all-exchange ventilation;
- Localizing – the mechanical ventilation intended for the prevention of distribution in harmful substances from the place of their education;
- Mechanical (synonym: ventilation artificial) – made by means of mechanical activators of movement of air (compressors, fans, ejectors, pumps);
- All-exchange – at which air is replaced in all volume of the room (unlike the local or localizing ventilation);
- Stitched – the mechanical ventilation made by means of giving to the room of clean air with formation of excessive pressure thanks to which the fulfilled (contaminated) air is removed through windows, doors, thinnesses in barriers and so forth;
- Stitched local – forced ventilation at which clean air is delivered to a certain workplace or to a certain part of the room;
- Forced-air and exhaust – mechanical ventilation at which an extract fulfilled (contaminated) and giving of clean air are carried out at the same time and are, as a rule, balanced on volume.
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