Differences between laminar flow hood and FFU

(I) Definition and working principle
FFU stands for Floor Mounted Unit, an air purification device used in dust-free workshops. It is usually composed of a fan, a filter, a housing, a control system, and other parts. The fan is responsible for sucking air into the equipment, filtering it through primary and high-efficiency filters, and then sending the purified air back to the dust-free workshop to form a closed loop. FFU supplies air through horizontal airflow, which can meet the requirements of various clean environments and can be arranged and adjusted as needed.
A Laminar flow hood is a fixed air purification device, commonly used in laboratories, pharmaceutical factories, and other fields. It uses a vertical airflow method to inhale outdoor air from the top, filter it through a high-efficiency filter, and then supply it vertically downward to the work area. The laminar flow hood continuously provides high-quality clean air through a circulating purification method, effectively controlling the diffusion of particles and harmful substances.
(II) Structure and characteristics
In terms of structural differences, FFU does not have a diffuser, and its air circulation method is more direct, which is suitable for local purification. Laminar flow hoods have diffusers that can evenly distribute clean air throughout the entire work area to achieve comprehensive air purification.
In terms of size and flexibility, the motor of the FFU must be built-in, and the maximum size is limited, usually not exceeding 11751175mm, but its mobility and flexibility are high. The motor of the laminar flow hood can be external, so the size is relatively large, and larger sizes can be customized according to needs, such as 26002600mm. However, this also means that the laminar flow hood has low flexibility and is usually used in fixed positions.
(III) Application scenarios and requirements
FFU is widely used in dust-free workshops in industries such as medicine, electronics, and food factories. It is suitable for scenarios that require a local high-cleanliness environment, such as specific process areas on a production line.
Laminar flow hoods are usually used in laboratories, pharmaceutical factories, and other places where the air quality in the work area is extremely high. It is particularly suitable for environments where comprehensive air purification is required and the space is relatively closed. In pharmaceutical factories, laminar flow hoods can play an important role in the filling, sub packaging, and plugging of sterile injections and the filling, freeze-drying, and plugging of biological products.
(IV) Energy saving and price
In terms of energy saving, although the energy-saving performance of FFU and laminar flow hood depends on the specific model and configuration, generally speaking, energy-saving FFU can show lower energy consumption and higher cost performance in long-term use.
Regarding price, laminar flow hoods are usually more expensive due to their larger size and customization. The price of FFU varies according to factors such as model, air volume, and configuration, but overall, the initial investment cost of FFU is relatively low.