CLASSIFICATION OF VENTILATION SYSTEMS
Ventilation brings fresh air from outside into a facility or a space and disperses it over there. The basic aim of ventilating buildings is to produce clean airflow for respiration by both eliminating and diluting the contaminants. Ventilation systems are classified into three.
- Natural Ventilation
- Forced Ventilation
- Hybrid Ventilation
External air is brought through specially designed apertures in the building envelope by natural forces, such as winds and temperature buoyancy force, due to differences in indoor and outdoor air densities. Doors, winters, solar chimneys, vents, and trickling ventilators are examples of purpose-built apertures. Climate, design of the building, and social interactions all affect a structure’s natural ventilation.
Forced ventilation is operated by #mechanical fans. Fans can be mounted in air vents or directly in windows, walls, or other surfaces to provide or remove heat from a room. Climate determines the kind of forced ventilation that is used. For instance, infiltration may need to be avoided or controlled in hot, humid locations to lessen interstitial dampness. This happens when warm, humid air from inside a structure enters a wall, roof, or floor and encounters a cold surface.
Natural forces are used by hybrid ventilation to achieve the necessary flow rate. When the natural ventilation flow rate is inadequate, it uses mechanical ventilation. Exhaust fans can be placed to boost airflow in spaces containing patients with respiratory infections when natural ventilation alone isn’t appropriate. However, caution must be exercised when using this straightforward hybrid ventilation method.
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