Commercial in-line fans are available that sit above the ceiling, often some distance from the room they are actually extracting the air from. They are connected to vents in the ceiling by ducting, which then connects to the inline fan, and then expels the air through more ducting to a grill in an outside wall.
Fans have helped to create safer and more pleasant internal environments for hundreds of years. The invention of mechanical fans is found in the industrial revolution and the first commercially viable electric fans were made available to the US public early in the 1930's.
Today the technology behind fan manufacturing and ventilation solutions have sky-rocketed to create fans for virtually every use from cooling devices in a server room; to ventilation in a manufacturing plant; to keeping a bathroom clear of damp air.
Generally speaking, fans and their accessories can be divided into 3 main usage categories: domestic use, industrial use and commercial use.
Industrial Fans will often have a very robust requirement and it is essential to involve experienced engineers with the installation of such ventilation. Other than just determining whether the fans will be required for air supply or for exhaust functions (i.e.: as an extractor fan) the engineer or installation technician will need to be keenly aware of both the working temperatures of the units as well as any thermal protection qualities of its associated housing or frame.
Some industrial fans will come with controllable speeds which can be very handy in a changeable internal environment, especially with regards to saving on ventilation costs at times when the air regulation needs of an area are reduced. Special features such as built in monitoring and systems integration come in handy when working in a potentially hazardous environment for example when chemicals or volatile substances are involved. Generally speaking, fire resistance and corrosion resistance are both 'plus' features for any industrial ventilation setup. Above the 'plus' one will need to consider the health and safety requirements of your region such as vibration or noise control and air quality regulations related to worker health.
Commercial Fans would not have as robust a requirement but the overall integration of fans into the building structure and management system is key to efficiency. Automatic ventilation in refrigeration units or in rooms that will typically contain many people at the same time will keep areas safe and comfortable. Operational areas such as server rooms (also known as data rooms) and elevators will need to provide adequate ventilation, usually in the form of extractor fans, to remove excess heat generated by the operating machinery which often runs continuously. Commercial ventilation also acts as a barrier to unwanted external influences such as insects, pollution and natural allergens.
Lastly domestic fans find their main purpose in providing less costly air quality solutions. There are two ways to cut costs with a domestic ventilation solution. You can invest in a 'cheap and cheerful' unit from the beginning resulting in a smaller initial cost or you can install a slightly more costly fan and ducting system with operational features that help you save on heating and ventilation costs in the long run. There are a wide variety of low energy extractor fans and ventilation units are now available for kitchens, washrooms and living rooms. In addition heat recovery units now help you to use the heat from stale air that is being extracted to warm-up fresh air that is being pulled in by your system.
Additional information can be found at the Industrial High Pressure Blower Company web site http://www.highpressureblower.net/pressureblower.html
Alex TodorovoIndustrial Mechanical Process EngineerHigh Pressure Blower Co.alex.todorov@canadablower.comhttp://www.highpressureblower.net/MixFlowFans.htmlhttp://www.highpressureblower.net/rfq.html
Blowers and Fans for Industrial OEM Applications
For a satisfactory job of eliminating excessively hot air, it is usually essential to have powered wall and/or roof exhausters. These fans should also help to control air pressure within the building whether it be negative or positive pressure.
Attic Fans
Attic and roof ventilation allows excess heat and moisture to escape at home to reduce summer cooling costs, pre-mature deterioration of roofing materials and condensation can lead to costly repairs. Effective attic ventilation relies on natural convection to pull air from the top to the bottom position, often in the open in Sofia, and the exhaust hot air from the ceiling vent in a higher position, such as through a gable, or open. Many new and existing homes are not ceilings, and its architecture can not afford soffits perforations for ventilation.
Centrifugal Blower Fan
Attic fans are, without a doubt, effective tools in bringing ample air exposure to the attic. Without these, all the heat from the sunlight is absorbed into the house even without bringing noticeable change to the temperature. The same thing happens even when the days are not too sunny. All the heat absorbed from its daily encounter with direct sunlight is trapped inside the attic. Not only that, since warm air naturally rises, all the heat in the house goes up to the attic. This can result to a throttling discomfort for anyone who goes in the attic to either look for something in the storage or to bring over new belongings for keeping.
