Onecleans Hospital Cleanroom Air Filtration Products: Participation in Purification Air Conditioning System Solution Design
A well-designed air filtration system lies at the heart of hospital cleanroom operation. It directly determines the environmental cleanliness, medical safety and infection control effect of key medical areas such as clean operating rooms and sterile wards. The engineering team of Onecleans takes part in the overall layout and air duct system solution design of hospital cleanrooms, cooperating with the general contractor of purification air conditioning to complete the planning of the integrated modular air handling unit. The project covers clean operating rooms, sterile nursing stations, precision equipment rooms, clean corridors, pharmaceutical storage rooms, anesthesia laboratories and other functional areas.
In accordance with international medical cleanroom design standards, we provide professional selection suggestions and supporting filtration products for the pre-filter section and medium-efficiency filter section inside the modular purification air handling unit, fully meeting the strict air quality requirements of medical scenarios.
The Modular Purification Air Handling Unit
The core equipment of hospital clean air systems is the modular purification air handling unit. It has stricter sealing and structural requirements than ordinary air conditioning units. For biological cleanrooms, the system resistance is higher, which imposes higher standards on unit tightness. The complete unit is assembled with multiple functional sections as required: fresh air and return air mixing section, pre-filter section, heating section, surface cooling section, humidification section, fan section, sterilization section, secondary return air section, transition section, medium-efficiency filter section, air outlet section and sound attenuation section. During engineering design, designers select required sections and arrange them scientifically according to the cleanliness class of the project.
Fresh Air and Return Air Mixing Section
It mixes fresh air and primary return air within this section. Manual regulating valves are installed at fresh air and return air inlets. If the system is equipped with automatic control devices, electric regulating valves will be fitted at fresh air and return air inlets. In transition seasons, increased fresh air volume can save energy.
Pre-Filter Section
This section is fitted with Onecleans pre-filters. Panel pre-filters occupy less space. Bag pre-filters feature larger filtration area and lower resistance under the same face velocity, which shortens unit length and saves mechanical room space. Bag pre-filters are preferred when mechanical room space is sufficient. We recommend suitable pre-filters according to project cleanliness level and site conditions instead of blindly relying on selection software.
Featured pre-filter: G4 Panel Prefilter
Heating Section
It heats air in winter or re-heats air in summer. Hot water heaters or steam heaters are available depending on heat sources. Electric heaters can also be adopted after technical and economic comparison.
Surface Cooling Section
It contains cooling coils and drain pans to cool or dehumidify air in summer.
Humidification Section
Humidifiers are installed here. For biological cleanrooms, dry steam humidifiers are preferred, as they do not contaminate air and allow easy humidification control. Water spray humidifiers (electrode, centrifugal and ultrasonic types) tend to breed bacteria in water tanks, so they shall be avoided in biological cleanroom projects.
Fan Section
Centrifugal fans are installed inside. Under required air volume and pressure, low-speed fans are recommended to reduce noise. Spring isolators deliver good vibration damping. Stainless steel fans are recommended for units used in hospital clean operating departments.
Sterilization Section
Ozone generators or UV germicidal lamps are equipped. Ozone sterilization is eco-friendly and effective for killing bacteria inside units, ductwork and cleanrooms. UV sterilization only works on the inner surfaces of the unit. Ozone sterilization must be carried out when no personnel stay in the cleanroom, because ozone corrodes circuit boards of some electronic instruments.
Secondary Return Air Section
This section can be adopted if secondary return air is required for air treatment.
Transition Section
It reserves space for maintenance without equipment installed, fitted with access doors for later inspection.
Medium-Efficiency Filter Section
This section is equipped with Onecleans bag medium-efficiency filters. In some projects, the medium-efficiency filter section is combined with the air outlet section to form a combined medium-efficiency air outlet section. Air outlets are reserved on the top for access to technical plenum. For hospital clean operating rooms, air outlets are usually arranged on the side of the top to reduce elbows and simplify piping.
Featured medium-efficiency filter: F8 Glass Fiber Medium Efficiency Bag Filter
Air Outlet Section
It may be combined with the medium-efficiency filter section. Air outlets can be arranged on the top or side based on site conditions.
Sound Attenuation Section
It reduces noise. Micro-perforated plate silencers are widely used in purification projects. The sound attenuation section is recommended at the unit outlet. If installed at the unit inlet or outlet, sufficient length must be reserved to guarantee noise reduction effect. When mechanical room space is limited, silencers can be mounted on supply and return air ducts instead of inside the unit.
HEPA Filters: Core Guardian for Key Medical Clean Areas
Besides pre-filters and medium-efficiency filters inside air handling units, Onecleans also supplies terminal HEPA filters for cleanrooms. HEPA filters are installed at the air supply terminals of clean operating rooms, sterile nursing stations, anesthesia laboratories and clean corridors. They achieve over 99.97% filtration efficiency for 0.3 μm particles, efficiently removing bacteria, viruses and other harmful microorganisms, and strictly controlling airborne particle and bacterial counts in clean areas.
In operating rooms (ORs), HEPA filters are mounted in ceiling laminar flow hoods and air supply outlets, delivering purified sterile air to surgical zones to create a dust-free and bacteria-free environment and effectively reduce post-operation infection risks. In auxiliary clean areas such as precision equipment rooms and pharmaceutical storage rooms, HEPA filters maintain stable air cleanliness to ensure safe storage of medical equipment and sterile medicines.
Featured HEPA filter: V-Bank Filter – Hospital Grade (H13/H14)
ULPA Filters: Ultimate Protection for Ultra-High Cleanliness Scenarios
For hospital areas with higher environmental requirements, such as class I ultra-clean operating rooms, biosafety laboratories and neonatal intensive care units, Onecleans provides ULPA filters. They achieve more than 99.999% filtration efficiency for 0.12 μm particles, delivering superior air purification and intercepting ultra-fine particles and pathogenic microorganisms to the maximum extent to meet the strictest environmental standards of medical cleanrooms.
ULPA filters provide ultimate air quality assurance for high-standard hospital cleanrooms, laying a safe and reliable environmental foundation for high-precision surgery, special medical care and experimental research.
Featured ULPA filter: Panel ULPA Filter (Class U15–U17)
Onecleans: Focus on Cleanroom Filtration Products & Support Project Solution Design
Onecleans does not manufacture complete modular purification air handling units. We specialize in R&D and supply of air filters. For hospital cleanroom projects, our engineering team participates in discussions on overall cleanroom solutions. We focus on providing professional selection recommendations for the pre-filter section and medium-efficiency filter section of modular purification air handling units, and matching applicable pre-filters and medium-efficiency filters. Meanwhile, we supply terminal HEPA and ULPA filters to cooperate with general contractors for the implementation of the whole purification system.
According to the functional positioning, cleanliness class and air volume demand of different zones in hospital cleanrooms, we recommend proper filter models for the pre-filter section, medium-efficiency filter section inside air handling units and terminal air supply outlets, matching the whole purification system, helping hospitals build safe, stable and compliant clean medical environments.
For new hospital cleanroom construction projects or upgrading of existing air filtration systems, Onecleans can provide customized, reliable air filter products and professional technical support for filter selection, safeguarding medical safety and environmental control.