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عربىPharma United supplies the cleanroom HVAC solution manufacturer product family within our Cleanroom Products portfolio: HEPA filters and HEPA supply boxes. These terminal filtration components connect the HVAC system to the cleanroom enclosure, delivering air at the required particle limit, airflow rate and room pressure. We specify, supply and integrate these items with our cleanroom panels, doors, equipment and modular PODs, so the filtration system arrives as part of one coordinated package.
The Range and Application Fit
The Other category contains two complementary products, each aimed at a different point in the air treatment path. They are used together in most cleanroom and controlled-environment projects.
HEPA Filter
High-efficiency filter elements for cleanroom HVAC systems and cleanroom equipment. We supply primary, medium, HEPA and ULPA stages for the air treatment train, with efficiency and pressure-drop data needed to match the fan and duct design. Applications include pharmaceutical factories, laboratories, hospitals, operating rooms, food workshops, electronics cleanrooms, air showers, pass boxes, laminar air flow units and weighing booths. View the HEPA Filter range
HEPA Supply Box
Terminal air supply unit installed at the cleanroom ceiling or air outlet. It houses the final filter, connects to ductwork and distributes filtered air into the room. Configurations such as whirl-type high-efficiency diffusers, mesh air supply outlets and all-sided air delivery help control airflow distribution and room pressure. View the HEPA Supply Box range
HEPA Filter and Supply Box as a System
The filter performs the particle removal; the supply box supports, seals and distributes the filtered air. Specifying them together avoids mismatched flanges, undersized diffusers and airflow distribution problems during commissioning.
| Product | Function | Typical Location | Selection Inputs |
|---|---|---|---|
| HEPA Filter | Removes fine airborne particles; final protection for the room or the equipment | AHU, duct, terminal box or equipment housing | Efficiency class, rated airflow, initial and final pressure drop, particle challenge |
| HEPA Supply Box | Terminal air delivery; supports and seals the final filter; distributes air into the room | Cleanroom ceiling grid or air supply outlet | Duct connection, ceiling type, diffuser pattern, maintenance access |
| Primary / Medium Filter | Pre-filtration ahead of HEPA or ULPA stages | AHU intake and intermediate positions | Filter class, airflow, dust-holding capacity, replacement interval |
Critical Specifications and Engineering Basis
The proposal for an HEPA filter and supply box is prepared from room data, not from a generic catalogue. We need the controlled zone parameters, the air volume and the interface conditions before selecting terminal sizes and filter stages.
- Target ISO class and room air change rate
- Supply air volume and available fan static pressure
- Allowable final pressure drop for filter life
- Ceiling construction and available plenum depth
- Preferred diffuser style and air distribution pattern
- Control interface: manual balancing, BMS or PLC
- Installation and maintenance access for leak testing and replacement
We size each terminal so the filter face velocity and diffuser throw match the room geometry. The proposal includes the terminal layout, airflow target and pressure-drop budget, giving the commissioning team a clear set-point for each box.
Integration, Installation and Controls
A terminal HEPA supply box must be sealed to the ceiling system so bypass air cannot enter the room unfiltered. We coordinate the box flange and sealing method with the ceiling panel cut-out, duct drop and cleanroom pressure regime.
- Volume control damper for balancing each terminal
- Differential pressure tappings or transmitter for filter loading monitoring
- Motorized damper option for automated room pressure control
- Gel-seal or gasket-seal filter frames
- Access door for filter change without removing the diffuser
For high-potency or hazardous containment, bag-in/bag-out filter change housings allow contaminated filters to be removed safely.
Quality Assurance and Acceptance
Because the filtration terminals are supplied together with the cleanroom enclosure and related equipment, the installation sequence can be controlled from one point. Our engineering team supports site commissioning with practical test points and expected values.
- Airflow measurement at each supply box
- Particle count at rest and operational states
- Room pressure differential verification
- Filter installation leak testing after mounting
- Visual inspection of sealing, diffuser finish and access panel fit
The documentation package includes product data sheets, dimensions, installation instructions and test point information needed to support cleanroom validation.
Maintenance, Spare Parts and Serviceability
Pre-filter maintenance is the most effective way to extend HEPA filter life. Monitor differential pressure, replace primary and medium filters on schedule, and have spare gaskets and final filters staged before they are needed.
- Replace primary or medium filters when pressure drop or run time reaches the selected limit
- Record the final filter pressure drop and replace before the maximum value
- Keep spare filter elements and gaskets for the installed terminal boxes
- Clean diffuser surfaces with cleanroom-compatible agents
- Re-test filter installation after every replacement
We schedule delivery to suit the cleanroom construction sequence, reducing storage time and handling damage on site.
Information We Use to Configure Your Solution
- Room dimensions and target ISO cleanliness class
- Supply air volume or air changes per hour
- Ceiling construction and plenum depth
- Fan static pressure and existing pre-filter arrangement
- Number of terminal boxes, diffuser style and control interface
- Access constraints for filter replacement and leak testing
- Project schedule and delivery milestones
Frequently Asked Questions
What applications are covered by this Other product category?
HEPA filters and supply boxes support pharmaceutical, laboratory, hospital, operating room, food and electronics cleanrooms. They are also fitted inside air showers, pass boxes, laminar air flow units and weighing booths, where the equipment itself must supply clean air to the process point.
What is the difference between a HEPA filter and a HEPA supply box?
A HEPA filter is the replaceable filter element. A HEPA supply box is the terminal housing that holds the filter, connects to the duct, distributes air through a diffuser and provides access for maintenance. In most projects you need both.
How do we choose between HEPA and ULPA filters?
HEPA filters cover standard cleanroom particle control. ULPA is used when the process demands a higher level of airborne contamination control, usually for critical microelectronics or sensitive pharmaceutical steps. This requires a higher static pressure and a more careful final pressure-drop budget.
Can the supply box be connected to the building automation system?
By adding a differential pressure transmitter or a motorized volume control damper, the supply box can report filter loading and maintain airflow set-point control from a BMS or cleanroom control panel. We include this interface in the proposal when the project specification is provided.
What acceptance data is needed after installation?
We plan acceptance around airflow measurement at each terminal, particle counts for the target ISO class, room pressure differentials and leak testing of filter installations. These checks confirm that the terminal filter system is actually delivering the design condition.
