Ventilation and air conditioning installation are designed to maintain indoor air condition, temperature, humidity, speed and purity in pre-established limits, throughout the year, regardless of weather factors variation of the heat release and internal consumption. Microclimate parameters inside limits depend on the destination premises, the nature of activity or technological processes.
Quality of the environment in which people exercise their activity has a complex influence their faction, both in terms of health and hygiene, and the work efficiency. Environmental quality is assessed both by value and comfort principal parameters through other secondary factors, such as clean air, degree of ionization, quality lighting and more.
Any ventilation system should introduce indoor treated air (displaced air, supply air) to take excess hazards (heat, humidity, gases, vapors, dust, etc.) and to eliminate them with it, then everything be removed outside (exhaust air).