Air Exchange Ventailation Makes Improvement of Indoor Air

An air exchange ventilation system can be described as any system that forces air from outside to enter a room or area, forcing fresh air into the interior of that same space at a higher temperature than the outside air. Air exchanges are commonly used in industrial, office and home applications to assist with temperature control and ventilation. A commercial air exchange may be in the form of a permanent or portable control station, which requires installation for each air handling unit. Alternatively, a central air conditioning system may be utilised in a variety of industrial and business premises, where a number of air conditioning units are connected to the same control panel, thereby providing a coordinated approach to temperature control.

 

Air exchangers in a system such as a central air conditioning system typically consist of a furnace and a heat recovery unit. Furnace airflow is increased through air exchangers by convection, with heated air pumped from the heating furnace into the heat recovery unit (HRA). The heated air is then released into the room or space, where it can be circulated by means of fans or ducts. In some cases, an air exchange ventilation system can also comprise a blower. Blower systems usually incorporate two ducts, one to bring heated indoor air into the HRA, and another to bring cooled indoor air into the space.

 

Air ventilation systems have many advantages. They can significantly reduce the level of pollutants or other unwanted gases that may be released into the air, especially if they are located in a building such as a manufacturing plant. For this reason, many central air conditioning systems are designed to include air exchangers at their most efficient point, often close to the furnace or heat recovery unit (HRE), to improve the efficiency of this energy-using unit. Similarly, air exchangers can be used in buildings to improve the ventilation of spaces by removing contaminated or toxic indoor air from the spaces.

 

Another advantage is the increased safety that a ventilation system can provide. If the air in an interior space is hot or dry, occupants can be more prone to heat illness. Also, a fresh outdoors air exchange provides more oxygen to people, stimulating them to move around more and help relieve muscle strain.

 

Fresh air outside, however, may also be inviting to many persons. For this reason, a fresh outdoors air exchange can increase the number of germs that may be present in an area. Moreover, some groups of people, such as allergy sufferers, may not be suited for fresh outdoor air exchange, because of their increased susceptibility to airborne irritants. 

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