What is Jet fan ventilation system?
Jet fans – also known as impulse or induction fans – support the natural flow between the supply air and extract air zones. They provide motion in regions with low air speeds, thus guaranteeing the daily ventilation requirement for all areas.
How does Jet fan works?
The function of jet fans is based on the impulse principle. From a small surface area (fan outlet) air is discharged at a relatively high velocity. When this air collides with the air in front of the fan, it thrusts the air forwards while at the same time drawing the surrounding air along with it (induction effect).
What is car park ventilation?
Why Car Park Ventilation Ventilation systems consist of exhaust and supply fans. Many car park ventilation systems are either running at full speed, are turned off, or operating on timers during perceived “peak periods”.
What is an impulse fan?
Impulse fans operate on well proven tunnel ventilation principles, producing a high velocity jet which thrusts against the air in front of the fan imparting momentum to all the surrounding air through entrainment as it diffuses. The volume of entrained air is significantly greater than that passing through the fan.
How do I choose a Jet fan?
Jet Fans are selected depending on their thrust value such as 20N, 30N, 50N, 80N and100N. They are selected also based on architectural design and their impact area to ensure there is no stagnant air in the car park( Image 2). no stagnant air in the car park.
Is axial or centrifugal fan better?
Many of you have most likely been told a characteristic of centrifugal fans is that they have higher pressure and lower airflow capabilities than axial fans. However, axial fans have higher airflow and lower pressure capabilities.
What is propeller fan?
The propeller fan is a comparatively simple form of a fan with a sheet metal, 3–6 bladed impeller directly driven by a motor mounted in the airstream. Efficiencies up to 75% can be achieved, though pressure development is low and overloading can occur if the fan is installed in a system with too high a resistance.
Are centrifugal fans quieter?
The scroll housing in a centrifugal fan accelerates the air and changes the direction of the airflow twice, a full 90 degree, before leaving the housing. Centrifugal blowers are quiet and reliable and are made to operate in a variety of environments and applications.
Which fan is used for ventilation and exhaust application?
Propeller fans are often used indoors as exhaust fans. Outdoor applications include air-cooled condensers and cooling towers. Efficiency is low. A particular type of axial fan is the bifurcated one, that can be directly coupled or driven by transmission.
What is the difference between propeller and axial fan?
Typical applications for propeller fans are wall- and ceiling-mounted exhausters and cooling tower and air-cooled heat exchangers. Axial fans are basically propeller fans with shorter rigid blades assembled in a tubular housing to provide some degree of controlling and/or streamlining the gas flow.
Do propeller fans work?
Propeller Fans Efficiencies up to 75% can be achieved, though pressure development is low and overloading can occur if the fan is installed in a system with too high a resistance. Performance can be improved by using aerofoil blades that give efficiencies up to 80%. Characteristics of a propeller fan.
What is a jetvent axial fan?
The JV Series of JetVent axial fans have been designed to provide effective ventilation in most spaces that contain harmful vehicle exhaust pollutants. They can be supplied for uni-directional or truly reversible air flow and are available in 2 sizes, 315mm and 400mm diameter.
What is a jet fan?
Introduction to Jet fans. •The use of Jet fans to move and to mix the air within an entire space •Pollutants are efficiently diluted throughout the entire volume of space •Fresh air is introduced and exhaust air removed for closed car parks via natural or mechanical means •No ductwork network for supply & exhaust air
Are jetvent fans suitable for car park installations?
The JIU Series of JetVent fans are suitable for car park installations where a low ceiling height and tight spaces make fitting the fans particularly challenging. The JIU CPC2 Series can be controlled either by a Variable Speed Drive (VSD) or a two-speed switching. Enclosed or semi-enclosed spaces that contain harmful vehicle exhaust pollutants.
Why choose fantech for indoor air quality control?
A partner you can count on in your fight against indoor air quality villains and engineered with powerful performance in mind. Breathe. Easy. Fantech makes air quality control easy thanks to decades of research, development, and refinement that continue to push the industry forward.