Mixed air

In ventilation and air conditioning technology, mixed air usually characterizes the mixture of outside air and part of the exhaust air , which is referred to as circulating air. This mixed air is then blown as supply air or mixed air into the room to be ventilated or air-conditioned.

advantages

• The heat, cold and moisture content of the exhaust air are reused and reduce the work involved in treating the outside air

disadvantage

• In the event of smoke or fire, flashover to supply air is possible
• poorer air quality than pure outside air systems
• Pollutant loads in the exhaust air (cigarette smoke, smells, fumes, etc.) are transferred back into the supply air
• Hygienic problems with germs possible (fungal spores, bacteria, viruses)
• Favoring the sick building syndrome

In mixed air systems, the admixture of exhaust air tends to deteriorate the air quality. In order to avoid this problem, an outside air system is used instead, in which the air is heated by means of heat recovery in winter .

See also

• circulating air
• ventilation
• Air types

literature

• Ernst-Rudolf Schramek, Hermann Recknagel , Eberhard Sprenger: Pocket book for heating + air conditioning. 73rd edition. Oldenbourg, Munich 2007, ISBN 3-8356-3104-7 .

Web links

Wiktionary: mixed air  - explanations of meanings, word origins, synonyms, translations