How to choose between FFU and high-efficiency air supply vents? Which parameters need the most attention in the project?
Direct answer: When comparing FFU and high-efficiency air supply outlets, you should first clarify the cleanliness goals and airflow organization, and then check the design air volume, filter efficiency and resistance, pressure source, adjustment method, ceiling space and maintenance conditions. Both can provide filtered air supply, but the air supply power and system configuration are different, and they cannot be compared only by appearance size or filtration level.
The FFU fan filter unit integrates the fan, motor, filter and control components at the end, and can adjust the air supply by a single unit or by zone. High-efficiency air supply outlets are usually connected to a centralized air supply system, with high-efficiency filters installed at the end. The required air volume and ability to overcome resistance are mainly provided by the upstream air conditioning unit and air duct system. The project should determine which option is more suitable based on the existing air supply system and process requirements.
First look at the air supply source and adjustment requirements
If the project has planned centralized air-conditioning air supply, it should be checked whether the air ducts, upstream fans and high-efficiency air supply outlets can provide the required air volume under the target resistance. If some process areas require denser terminal air supply, single machine speed regulation or zone control, the FFU solution can be evaluated.
When selecting an FFU, you should also confirm the power supply, speed regulation, communication and operating time requirements. Larger projects can be planned in advanceThe partitions and interfaces of the FFU group control system ; the efficient air supply outlet solution requires checking the air volume balance and adjustment method of the centralized system.
Air volume and static pressure should be compared in the corresponding system
The air volume of FFU should be based on the data when the specified filter is installed and under the design gear and resistance conditions. For high-efficiency air supply outlets, it is necessary to check the actual air volume sent to each end of the upstream system after bearing the resistance of the air duct and filter.
Both solutions cannot just look at the nominal maximum air volume. In particular, it is necessary to clarify the position of static pressure measurement in the performance data: FFU needs to look at the operating capability of the entire machine under the target air volume; efficient air supply outlets need to look at whether the centralized air supply system can provide sufficient pressure and complete the air volume balance of each branch.
Filtration efficiency, resistance and sealing are equally important
No matter which option you choose,HEPA or ULPA air filters should be configured according to particle control requirements. The filter resistance, installation seal, detection method and later replacement method should be confirmed together with the terminal structure.
When increasing the filtration level, recheck the air supply capacity. The FFU plan needs to review the fan working point; the high-efficiency air supply outlet plan needs to review the pressure of the upstream system and the air volume at each end. The fact that the filter efficiency reaches the standard does not mean that the on-site air supply and cleanliness automatically reach the standard.
Installation and maintenance conditions determine whether the plan can be implemented
FFU should check the ceiling module, equipment height, power and communication wiring, and the maintenance space for filters and motors. For high-efficiency air supply outlets, check the air duct connections, ceiling openings, leak detection and filter replacement conditions. For projects with limited space at the equipment end or local space, it is also necessary to confirm the air inlet and return paths and interface sizes.
Aili Industry can match the FFU complete machine configuration based on the project's cleanliness requirements, target air volume, filtration scheme and installation conditions. For batch projects, it is recommended to confirm the prototype first, and then check the filter, air volume, control and on-site operation results according to the technical agreement. The specific plan should be based on the project drawings and test data under agreed working conditions.
Q: Can FFU directly replace the high-efficiency air supply vent?
Answer: You cannot replace based on size only. The air supply power, air volume, filters, power supply, ceiling and overall air flow organization must also be rechecked.
Q: The filters of the two solutions are the same, so will the air supply effect be the same?
Answer: Not necessarily. The actual air volume, layout density, wind speed distribution and return air path will also affect the on-site effect.
Q: What information should be prepared before selection?
Answer: It is recommended to provide cleanliness targets, floor and ceiling plans, target air volume, existing air supply system conditions, filtration requirements, and control and maintenance needs.
