AIRCOL
Radial fans are fans that create a pressure difference. The resulting air effect works according to the centrifugal force direction. A centrifugal fan is a mechanical device used to move air or other gases. These fans have a rotating impeller, similar to a pump, and a helical housing where the impeller is located. Air or gas enters parallel to the axis, gets pressurized, and is directed tangentially to the impeller channels, then expelled through the outlet. Due to the high pressure they generate, centrifugal fans are ideal for high-pressure applications such as drying and air conditioning systems. With all moving parts enclosed, these fans are ideal for use in air pollution and filtration systems because they also have particle reduction features.
Applications: For small and medium-sized spaces: They are suitable for ventilation in bathrooms, toilets, kitchens, pantries, laundry rooms, garages, workplaces, etc. They are designed specifically for use in ceiling-mounted ventilation applications with a connection pipe for aspirators.
The required air change for the environment is related to the purpose of use, the number of people and objects inside, and the activities being conducted. The table below shows the required air change rates for different environments.
Environment | Air Change Rate (per hour) |
Classrooms | 5-7 |
Libraries | 4-5 |
Home Kitchens | 15-25 |
Bathrooms | 5-7 |
Home WC | 4-5 |
General WC | 8-15 |
Meeting Rooms | 6-8 |
Offices | 4-8 |
Changing Rooms. | 6-8 |
The required airflow can be calculated by multiplying the air change rate by the volume of the room (m³). Alternatively, it can be calculated by multiplying the number of people by the airflow required per person.
For example: For an office with 5 people, a ceiling height of 2.6 meters, and a floor area of 50 m², the volume is 2.6 * 50 = 130 m³. According to the air change rate table, an office requires 4-8 air changes per hour. Taking the average value of 5, the required airflow would be 130 * 5 = 650 m³/h. For normal activity (non-smoking), the airflow requirement for 5 people is 5 * 29 = 145 m³/h. Therefore, the total airflow requirement would be 650 + 145 = 795 m³/h.
After calculating the airflow requirement, the fan selection should be based on this airflow need. Following that, the fan's installation location must be determined, such as whether it will be mounted on the ceiling, wall, chimney, or ventilation duct. Additionally, the fan's electrical voltage should be considered. In office settings, a single-phase fan is typically preferred, while industrial settings may require a three-phase (380V) fan.