How To Calculate The Number Of Fan Filter Unit

Fan filter unit is an indispensable part of the clean room project. It is a key factor in determining the clean room grade and purification effect. Do you know how many hepa fan filter unit should be installed in your clean room project? Here is how to determine the number of fan filter unit.

First have several key points should be determined before calculating the number of fan filter units. The area of the clean room, the grade of the clean room, the air volume of the fan filter unit and the efficiency of the fan filter unit. The area of the clean room is the most basic data. The length, width and height of cleanroom must be clear. The grade of the clean room must also be determined. Different grades have different requirements for cleanliness and the number of dust particles in the air, so the number of fan filter units is also different. The unit of fan filter unit air volume is m³/h, which means the volume of air filtered by the hepa fan filter unit in a fixed time. The efficiency of the fan filter unit refers to the filtering effect. The last thing to determine is the number of ventilation times in the clean room.

Determined these data, the next step is to calculate the number of clean room fan filter units. You can multiply the area of the clean room by the number of ventilation times, and then divide it by the air volume of the fan filter unit to get the number of fan filter units. The calculation formula is: Number of fan filter units = cleanroom area * ventilation times / fan filter unit air volume. The number of fan filter units can also be calculated based on the wind speed in the cleanroom. The calculation formula is: Number of fan filter units = cleanroom area * average wind speed * 3600 / (fan filter unit air volume * fan filter unit efficiency).

Although the number of clean room fan filter units can be calculated according to the above formula, some practical factors must be considered, such as the layout of the clean room, the number of rooms, the number of staff, the industry which the clean room in used, and the number of equipment in the clean room. Fan filter units have different materials and specifications, which should also be noted when selecting. Therefore, the final number of fan filter units should be appropriately adjusted according to the actual situation. After calculating the required number of fan filter units, some margin can be reserved. When a fan filter unit fails or is not replaced and maintained in time, the reserved fan filter unit for clean room can be used to work to avoid the situation where the clean room cannot operate normally.

As a highly efficient purification equipment, FFU plays an increasingly important role in clean rooms, providing strong support for the development of various industries.