Nanmar Environmental Protection Industry (Jiangsu) Co., Ltd.

 FFU (Fan Filter Units) is more precisely a self-powered, modular terminal air supply device with filtration capabilities. A fan draws air in from the top of the FFU, filters it through a HEPA filter, and then delivers the filtered clean air evenly across the entire outlet surface at a velocity of 0.45 m/s ± 20%. FFUs can be modularly connected, making them widely applicable in cleanrooms, clean benches, clean production lines, modular cleanrooms, and localized Class 100 cleanrooms.

Core components of high-efficiency air supply outlets in cleanroom ventilation systems

Simple mobile cleanroom (local high-efficiency cleanroom purification equipment)

Local purification equipment

Air shower is a kind of local purification equipment with strong versatility, which is installed between clean room and non-clean room. When people and goods want to enter the clean area, they need to be showered by air shower. The clean air blown out can remove the dust carried by people and goods, and can effectively block or reduce the dust source from entering the clean area. The front and rear doors of the air shower/cargo shower are electronically interlocked, which can also act as airlocks to prevent unpurified air from entering the clean area.

Clean rooms and dust-free production lines are important tools to ensure product quality, reduce production costs and improve production efficiency. With the advancement of science and technology and the development of industry, clean rooms and dust-free production lines will be more and more widely used in various industries.

Cleanroom engineering, also known as dust-free room engineering, refers to the process of removing particulate matter, harmful air, bacteria and other pollutants from the air within a specific space, and specifically designing the temperature, cleanliness, indoor pressure, airflow speed and distribution, noise, vibration and lighting, and static electricity control within the cleanroom to meet certain standard requirements.

Local purification equipment

Source manufacturers & quality factory

The clean laminar flow hood is a local air purification device that forms a vertical unidirectional airflow through a high-efficiency filter (HEPA) to provide a clean working environment. Its main features include flexibility, energy saving, and a wide range of application scenarios.

Cleanroom booth (also known as a clean booth, purification booth, or simple cleanroom) is a modular, portable, localized high-cleanliness environment device. It uses FFUs (fan-filter units) in conjunction with HEPA/ULPA high-efficiency filters to create a vertical unidirectional laminar flow, achieving a cleanliness level of 100–10,000 (ISO 5–8). It is suitable for scenarios requiring high cleanliness in specific areas, such as electronics manufacturing, biomedicine, and precision assembly.

Horizontal flow clean bench is through the fan air into the pre-filter, through the static pressure box into the high-efficiency filter, the filtered air is sent out in a horizontal airflow state. Provide local dust-free, sterile working environment, so as to ensure the production of environmental cleanliness requirements.

Clean workbench is a box-type air purification device used to provide a localized dust-free and sterile working environment, achieving a cleanliness level of Class 100 (ISO 5). Its working principle involves drawing in air with a fan, which then passes through a static pressure chamber and is filtered by a high-efficiency particulate air (HEPA) filter to remove particles and microorganisms. The filtered clean air is then delivered in a vertical or horizontal airflow pattern, forming a stable clean airflow barrier that effectively protects the working area from contamination. It is widely used in the fields of biology, medicine, and precision manufacturing.

The clean laminar flow hood  is an air purification unit that can provide a local clean environment. It can be flexibly installed above the process point that requires high cleanliness. The clean laminar flow hood can be used alone or combined into a strip-shaped clean area. It is mainly composed of a box, a fan, a high-efficiency air filter, a damping layer, lamps, etc., and the outer shell is sprayed with plastic. The product can be suspended or supported on the ground, with a compact structure and easy to use.

Air purification unit that provides a localized clean environment

Clean booth  is a simple cleanroom designed for quick and easy construction. Clean booths offer various cleanliness levels and spatial configurations, and can be designed and manufactured to meet specific needs. Their main features include ease of use, high flexibility, easy installation, short construction period, and portability. Clean booths can also be added to specific areas within a standard cleanroom where higher cleanliness is required, thus reducing costs. A clean booth is an air purification device that provides a localized high-cleanliness environment. It mainly consists of an air filtration unit, a pre-filter, a damping layer, and lighting fixtures. This product can be suspended or floor-mounted.

Cleanroom wardrobes, also known as dust-free wardrobes, are a type of wardrobe specifically designed for clean environments. They are widely used in special settings in industries such as electronics, optoelectronics, semiconductors, pharmaceuticals, precision instruments, meters, and food to store cleanroom garments, ensuring that the garments are not contaminated by other air sources during collection and transport.

Local Purification Equipment

FFU (Fan Filter Unit) is more precisely a self-powered, modular terminal air supply device with filtration capabilities. A fan draws air in from the top of the FFU, filters it through a HEPA filter, and then delivers the filtered clean air evenly across the entire outlet surface at a velocity of 0.45 m/s ± 20%. FFUs can be modularly connected, making them widely applicable in cleanrooms, clean benches, clean production lines, modular cleanrooms, and localized Class 100 cleanrooms.

Clean workbench is a local air purification equipment that can provide a dust-free and sterile working environment and is suitable for fields with special requirements for cleanliness. It is mainly composed of a box, a fan, a high-efficiency filter and electrical control, and creates a local clean operating environment through unidirectional air purification.

Cleanroom wardrobes, also known as dust-free wardrobes, are a type of wardrobe specifically designed for clean environments. They are widely used in special settings in industries such as electronics, optoelectronics, semiconductors, pharmaceuticals, precision instruments, meters, and food to store cleanroom garments, ensuring that the garments are not contaminated by other air sources during collection and transport.

Pre-filter, medium-efficiency filter

HEPA filter, high temperature resistant

Cleanroom, also known as a dust-free room or clean workshop, is a specially designed room that eliminates airborne particles, harmful gases, bacteria, and other contaminants within a defined space, and controls indoor temperature, cleanliness, indoor pressure, airflow speed and distribution, noise and vibration, lighting, and static electricity within specific requirements. Its core function is to precisely control multiple environmental parameters within the space, providing a controlled production environment for industries with stringent requirements, such as precision manufacturing and biopharmaceuticals.

A modular clean booth provides widely applicable local air purification. Ceiling-mounted fan filter units (FFUs) draw in and filter air, then supply unidirectional airflow to the work area. Positive pressure prevents external particle ingress. The unit features low noise and energy consumption. High-quality antistatic PVC curtains incorporate a conductive grid, with high transparency, flexibility and resistance to aging.

Air showers remove surface dust from personnel and goods. Before entering the production area, personnel pass through the unit. Powerful filtered clean air is discharged from 360° adjustable nozzles from several directions, rapidly removing dust, hair and skin flakes from garments and goods. This reduces contamination introduced by cleanroom traffic and maintains normal clean area operation.

The HEPA exhaust terminal filters air discharged from biological laboratories or negative-pressure isolation rooms through high-efficiency filters, ensuring safe exhaust and compliance with applicable requirements.

A clean bench is designed to provide ISO 5 (Class 100) cleanliness in a local working area. Airflow may be horizontal or vertical unidirectional flow.

The transfer trolley is a mobile clean air unit with an integrated DC power supply, providing a local Grade A environment. It is widely used in pharmaceutical production for safe transfer from vial washing to filling, filling to freeze-drying, and freeze-drying to capping. Fast, seamless docking with equipment maintains Grade A conditions during material transfer and handover.

This local clean air unit can be flexibly installed above areas requiring high cleanliness. It comprises a housing, fan, HEPA filter, vibration-damping layer and lighting. The compact unit can be suspended or floor-supported. HEPA-filtered air passes through a membrane or diffuser plate, producing uniform unidirectional airflow across the working area to maintain a clean environment.

Fume hoods are used in research, chemical laboratories, electronics and mechanical industries to control emissions of toxic, harmful, flammable or explosive organic solvents and gases. They protect users, prevent contaminants from spreading into the laboratory and isolate operators from hazardous substances.

The Bag-In/Bag-Out filter system, abbreviated BIBO, is also used for ducted HEPA exhaust filtration. During operation, filters retain highly active or highly toxic aerosols, so replacement must prevent any contact with the external environment. The entire replacement procedure takes place inside a sealed bag, preventing hazardous aerosol release and reducing biological risks to personnel and the environment.

The online cleanroom environmental monitoring system places remote particle sensors at critical sampling points throughout the production area. Sensors sample and record air quality in real time and transmit results to the control computer. Pharmaceutical monitoring software compliant with 21 CFR Part 11 processes the data to provide continuous monitoring of airborne particles.

The HEPA supply terminal is the final filtration device in an air-conditioning system. It is widely used in pharmaceutical, medical, electronics, chemical and other industries.

A mist shower provides protection when handling highly contaminating products requiring dust containment. A key control point is the removal of protective garments and equipment at the clean area exit. Hazardous dust on garments and equipment must be safely treated to reduce operator exposure and environmental contamination.

The system safely and efficiently transfers materials between clean and non-clean areas while preventing disruption and contamination. Protective barriers, protective clean airflow, interlocked airlock doors and automatic conveying allow rapid material entry and exit while maintaining the clean environment.

A negative-pressure weighing booth provides a controlled workspace for sampling, weighing and analysis. It contains powders and reagents within the operating area, prevents their release, limits operator inhalation exposure and controls airborne dust.

The system is primarily used in laboratory animal facilities for transferring and biodecontaminating animal cages, materials and supplies. Hydrogen peroxide or ozone is used for disinfection.

A hand hygiene unit for cleanroom entry, used before changing into cleanroom garments to remove dust from hands, prevent garment contamination, maintain cleanliness and stop external dust entering the cleanroom.

A pass box is a cleanroom accessory for transferring materials between the inside and outside through a buffer zone. It limits door opening that disturbs cleanroom airflow and pressure, reduces personnel movement and prevents external dust ingress, thereby reducing contamination in clean areas.

This cleanroom accessory uses high-intensity pulsed xenon light for rapid disinfection against a range of pathogens. Instantaneous energy output is more than 3,000 times that of a conventional UV lamp, reducing conventional disinfection time from over 25 minutes to 3 minutes. Its penetration capability makes it particularly suitable for rough surfaces.

The low-temperature vaporized hydrogen peroxide sterilizer (VHPS) uses the superior sporicidal action of H₂O₂ vapor at ambient temperature compared with its liquid form. Hydroxyl radicals attack cellular components, including lipids, proteins and DNA, to achieve complete sterilization.

This isolator supports aseptic pharmaceutical production and provides containment for toxic and highly potent compounds, meeting OEB5 protection requirements. It comprises a transfer port, compounding chamber, control system and cleaning system.

Reagent preparation → Cell pretreatment → Cell culture and centrifugation → Cell microscopy → Environmental monitoring

A sterility testing isolator is a closed system providing an aseptic environment for sterility testing. It prevents microbial contamination of test samples and limits contamination of test materials and ancillary equipment, improving the accuracy of test results.

HEPA filter with separator（High-efficiency particulate air filters ）use aluminum foil, paper, or plastic separators to evenly separate glass fiber filter media, creating 2-4mm airflow channels to ensure smooth airflow and prevent filter paper deformation. Their core function is to physically intercept and remove particles such as dust, pollen, bacteria, and viruses. They are widely used in cleanrooms, hospital operating rooms, pharmaceutical factories, and electronics manufacturing workshops—places with extremely high air quality requirements. High-temperature resistant models can also adapt to high-temperature environments, enhancing application flexibility. With their stable structure, high efficiency, and long lifespan, they are key air purification devices in industrial and medical fields.

The high-volume V-type high-efficiency air filter is a high-efficiency filtration device that uses a V-shaped pleated design to increase the effective filtration area (2-3 times larger than traditional flat filters), achieving higher airflow within a limited space. Its core advantages lie in low resistance and high efficiency, with a filtration efficiency of ≥99.97% for 0.3-micron particles, meeting EN 1822 standards. It is suitable for cleanrooms, hospital operating rooms, and other places with high air quality requirements, significantly reducing the number of filters needed and space requirements, improving purification efficiency, and lowering operating costs.

Primary paper-frame filters are mainly used for initial filtration in air conditioning systems, effectively intercepting dust particles larger than 5μm. Their structure consists of a high-strength, waterproof paper frame and pleated fiber filter media, increasing filtration efficiency by expanding the surface area facing the air. As air flows through, dust particles are blocked by the pleats of the filter media, allowing clean air to flow out smoothly. The paper-frame design not only enhances structural stability but also facilitates installation and replacement. Suitable for industrial and residential applications with low air quality requirements, it serves as a pre-treatment step before high-efficiency filtration.

Pre-filter/Medium-efficiency filter

G3/G4 grade glass fiber paint mist filter cotton is mainly used for pre-filtration of fresh and return air in air conditioning systems, as well as pre-filter protection for high-efficiency filtration equipment. It is particularly suitable for automotive and furniture paint booths and coating production lines, effectively capturing paint particles and mist contaminants to ensure the lifespan of subsequent high-efficiency filters and the quality of the coated surface. Its multi-layer glass fiber structure features high dust holding capacity and low resistance, making it suitable for continuous operation environments.

Galvanized frame plate type pre-filters are commonly used equipment in the primary filtration stage of air filtration systems.

The separatorless HEPA filter uses waterproof and flame-retardant glass fiber or PP filter paper, combined with hot melt adhesive separators and a fully sealed adhesive structure to ensure uniform airflow and prevent side leakage. Its compact structure and low pressure loss support integrated sealing technology and 100% leak testing, complying with EN1822 standards. MPPS efficiency testing has been conducted, making it suitable for high-cleanliness environments such as hospital operating rooms, pharmaceutical plants, and microelectronics manufacturing. It is widely used in cleanroom terminal filtration to ensure air cleanliness.

Primary and medium efficiency metal mesh nylon mesh filters (aluminum alloy frame)

Liquid tank type high efficiency filter is primarily used to remove particulate matter, microorganisms, and chemical contaminants from the air, ensuring that air quality in clean areas meets standards. Their structure achieves high-efficiency airtightness through a liquid-sump seal, and they are widely used in industries with stringent cleanliness requirements, such as pharmaceuticals, food processing, and electronics manufacturing. This equipment effectively protects precision instruments and production equipment, reducing wear and corrosion and extending their service life. It also features energy efficiency, high performance, and convenient maintenance, improving production efficiency and product quality. In aseptic preparation production and food processing, it prevents cross-contamination and ensures product safety.

Medium efficiency bag filter（Intermediate filtration equipment commonly used in air purification systems）

Fiberglass paint barrier mesh, also commonly known as paint mist felt, floor cotton, or glass fiber filter cotton, is a commonly used filtration consumable in painting and spraying applications.

HEPA filter

Mainly used for terminal filtration in places requiring high cleanliness, such as electronics, pharmaceutical industry and hospitals

medium efficiency filter

Plate-type high-efficiency filter, the core terminal filter component of a fresh air/air purification system.

Aluminum frame high-efficiency particulate filters (HEPA filters) are the core filters in the air purification field.

Primary filtration equipment commonly used in air purification and ventilation systems

Green and white dual-color fiberglass paint mist filter cotton，also commonly known as paint barrier mesh, paint mist felt, or paint booth flooring, it is a commonly used air filtration material in the industrial field.

pre filter

Medium filter

 (medium efficiency, high efficiency, sub-high efficiency)

HEPA Filter

Source manufacturer, customized services

Pre-filters are primarily used to capture particles larger than 5μm, serving as a pre-filtration layer to protect subsequent high-efficiency filter media and extend their lifespan;Medium-efficiency filters target particles from 1μm to 5μm and are commonly used in the intermediate stage of multi-stage filtration systems. Both are typically used together to improve overall purification efficiency and system economy. Pre-filter media are mostly fiber cotton, graded G1-G4; medium-efficiency filter media commonly use polyester fiber, graded F5-F9, offering higher filtration precision and durability. A proper combination effectively balances performance and cost.

Disposable air filters are integrated, high-efficiency cleanroom devices, combining a high-efficiency filter with a static pressure chamber. They are widely used in high-cleanliness environments such as hospital operating rooms, pharmaceutical plants, laboratories, microelectronics facilities, and food processing plants. Their robust aluminum frame structure facilitates easy installation without the need for on-site leak testing, effectively reducing the risk of contamination. This product offers advantages such as rapid installation, simple maintenance, and high filtration efficiency, making it suitable for scenarios with stringent air quality requirements. With advancements in cleanroom technology, it is continuously being upgraded in terms of intelligent monitoring and energy-saving design.