Ventilation System
Mechanical ventilation systems in large commercial buildings are normally designed and operated to heat and cool the air, as well as to draw in and circulate outdoor air. On the other hand, ventilation systems themselves can be a source of indoor pollution and contribute to indoor air problems if they are poorly designed, operated, or maintained.
- Smoke mounted exhaust & fresh air fans
- In line ducted exhaust and fresh air system
- Roof curb exhaust & fresh air system
- Treated fresh air handling systems
- Wall mounted exhaust fans
- Fume hood exhaust system
- Car parking ventilation system
- Tunnel ventilation system
- Smoke purge fans
sometimes spread harmful biological contaminants that have steadily multiplied in cooling towers, humidifiers, dehumidifiers, air conditioners, or inside surfaces of ventilation ducts. For example, problems arise when, in an effort to save energy, ventilation systems are incorrectly programmed and bring in adequate amounts of outdoor air.
Other examples of inadequate ventilation occur when the air supply and return vents within a space are blocked or placed in a manner that prevents the outdoor air to reach the breathing zone of building occupants. Improper location of outdoor air intake vents can also bring in contaminated air, particularly from automobile and truck exhaust, fumes from dumpsters, boiler emissions, or air vented from bathrooms and kitchens.
