What are the applicable scenarios of AC ffu and DC ffu respectively?

Due to their different performance characteristics, AC FFUs and DC FFUs have different applicable scenarios:
Ac FFU
Large industrial clean rooms: In some large industrial clean rooms, the demand for air volume is relatively high and stable, and usually only needs to operate under several specific working conditions, such as a constant high air volume or low air volume state. The power of the AC FFU is relatively large, which can meet the demand of such a large air volume. Moreover, its limited speed regulation method can also meet the requirements under this relatively fixed working condition. For instance, in the painting clean room of an automotive manufacturing workshop, it is usually necessary to maintain a certain level of cleanliness and ventilation volume. The AC FFU can meet the ventilation requirements of different production stages through simple two-speed or three-speed adjustments.
Cost-sensitive projects: For some projects with limited budgets, such as the cleanroom renovation projects of some small electronics factories, the relatively low cost of AC FFUs makes it an economical choice. Although its energy-saving effect is not as good as that of DC FFU, in the case of tight funds in the early stage of the project and relatively less consideration of operating costs, AC FFU can meet the basic ventilation requirements while reducing the initial investment of the project.
Places with low noise requirements: The noise generated during the operation of the AC FFU is relatively high, so it is suitable for places with low noise requirements. For instance, the ventilation systems in some industrial warehouses are mainly designed to maintain air circulation and a certain level of cleanliness, with relatively low restrictions on environmental noise. Ac FFUs can be used normally in these places without causing significant impacts on the working environment.
Dc FFU
High-precision electronic chip manufacturing workshop: Electronic chip manufacturing has extremely high requirements for environmental cleanliness and air volume control, and it is necessary to precisely adjust the air volume to meet the needs of different production processes. The DC FFU can achieve precise speed regulation through PWM technology, thereby providing stable and accurate air volume and meeting the strict environmental requirements in the chip manufacturing process. For instance, in the chip photolithography process, it is necessary to strictly control the airflow in the clean room to prevent tiny particles from contaminating the chips. The DC FFU can precisely adjust the air volume according to the process requirements to ensure the stability of the environment.
Laboratories and research sites: Laboratories and research sites usually need to flexibly adjust the ventilation volume according to different experimental requirements, and have high demands for air quality and noise control. The wide speed regulation range and smooth regulation characteristics of the DC FFU can meet the flexible demand for air volume during the experiment. Meanwhile, its low-noise operation feature also provides a good working environment for researchers. For instance, in a biological laboratory, different experiments may require different ventilation conditions. A DC FFU can precisely adjust the air volume according to the experimental requirements without generating excessive noise to disturb the experimenter.
Hospital operating rooms and other places with high environmental requirements: Hospital operating rooms, intensive care units, and other places have extremely high requirements for air quality and environmental stability. They need to precisely control the ventilation volume to maintain appropriate air pressure, temperature, and humidity while ensuring low noise and low energy consumption. The DC FFU can precisely regulate the air volume, meeting the strict environmental requirements of these places, and its energy-saving feature can reduce the operating costs of hospitals. In addition, the low-noise operation of the DC FFU also helps to provide a quiet environment for patients and medical staff.
Datacenter: Data centers require a large amount of ventilation to cool equipment, and as a load of servers changes, the demand for air volume will also vary. The DC FFU can precisely adjust the air volume according to the actual heat load of the data center, achieving energy-saving operation. Meanwhile, its low-noise feature is also conducive to creating a relatively quiet data center environment and reducing noise interference to operation and maintenance personnel.