Ventilators are small windows, fixed at a greater height than the window, generally about 30 to 50 cm below roof level. The ventilator has a frame and a shutter, generally glazed, which is horizontally pivoted. The shutter can be opened or closed by means of two cords, one attached to the top rail and other to the bottom rail of the shutter. The top edge of the shutter opens inside and bottom edge opens outside, so that rain water is excluded.
A moderately dry air is usually the healthiest; and, if the temperature is moderate, is most grateful to the feelings; whereas, a damp atmosphere, particularly if accompanied by an chill wind, is very annoying to the system, particularly to persons who possess a sensitive skin, or are liable to attacks of coughs and colds.
Ventilation is the process by which fresh air is introduced and ventilated air is removed from an occupied space. The primary aim of ventilation is to preserve the qualities of air. Sometimes, ventilation may also be used to lower the temperature inside an occupied area.It is created by the differences in the distribution of air pressures around a building. Air moves from areas of high pressure to areas of low pressure with gravity and wind pressure affecting the airflow. The placement and control of doors and windows alters natural ventilation patterns.
Indoor air quality (IAQ) is a term referring to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. Now imagine replacing that stale, recirculated indoor air with fresh, filtered air up to 12 times a day. One will enjoy the benefits of reduced CO2 gases and increased oxygen (O2) levels so inmates breathe easier and feel better.
Problems with Poor Air Quality
Opening the windows and doors of is a great way to bring in fresh air and wash out the stale, re-circulated air. But most of the time, it can present a real set of problems due to bad weather conditions, uncomfortable temperatures, humidity, pollen, dust or strong odour
Indoor air pollution becomes more of a hazard, when the state of indoor air quality give rise for health concern. There is tendency to get sick from pollution in home and office than from pollution in the air outside. Keeping indoor air clean is an easy way to help relieve allergies, asthma, and other maladies. IAQ can be affected by microbial contaminants (mold, bacteria), gases (including carbon monoxide, radon, volatile organic compounds), particulates, or any mass or energy stressor that can induce adverse health conditions
Indoor air is becoming an increasingly more concerning health hazard than outdoor air. Using ventilation to dilute contaminants, filtration, and source control are the primary methods for improving indoor air quality in most buildings.
Participants