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HEPA Filter Terminal Boxes

How do pharmaceutical cleanrooms achieve ISO Class 5 air cleanliness when supply air contains particulates from upstream ductwork and fan systems? HEPA Filter Terminal Boxes provide final filtration at ceiling diffuser locations removing particles before air enters critical processing zones. 
HY D R O L Y SIS RESIS T ANCE
Material & Grade
  • Galvanized Steel – SGCC
  • Stainless Steel – SS304, SS316L
  • Aluminum Sheet – 5052, 6061
  • Powder-coated steel
  • Sheet thickness – Up to 2.0mm capable 
  • Maximum capable – 1200mm (H) x 1200mm (W) x 600mm (D) 
  • Customizable based on HEPA filter size (2×2, 2×4, 4×4 ft)
  • Powder Coating – RAL 9010 (White), Custom RAL
  • Thickness – 60-80 microns
  • Electropolished (Stainless Steel)
  • Epoxy coating 
  • Non-particulate shedding finish
  • CNC Laser Cutting
  • CNC Punching & Bending
  • TIG/MIG Welding
  • CNC Press Brake Forming
  • Airtight seam construction
  • Precision filter mounting provisions
  • Stainless Steel 304/316 Hardware
  • Filter clamping mechanisms
  • Gel seal/gasket provisions
  • Grounding provisions
  • Differential pressure tap fittings
  • Access panel hardware
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Product Description

Ceiling-mounted configurations accommodate HEPA filters with footprints from 2×2 feet to 4×4 feet while maintaining uniform laminar airflow across work surfaces. We engineer leak-tight construction preventing bypass airflow around filter edges that would compromise cleanroom classification. Through precision airflow distribution and zero-leak sealing, these terminal boxes enable compliant air quality supporting aseptic processing and sterile product manufacturing. 

Mounting Type
  • Ceiling-suspended mounting
  • Lay-in ceiling grid integration
  • Hard-ceiling mounting provisions
  • Plenum connection flanges
  • Seismic bracing provisions
  • Adjustable suspension hardware
  • ISO Class 3 (Class 1) support
  • ISO Class 5 (Class 100) capable
  • ISO Class 7 (Class 10,000) rated
  • HEPA filter efficiency – 99.97% @ 0.3μm (H13)
  • ULPA filter compatible (99.9995% @ 0.12μm)
  • Zero-leak filter sealing
  • Vibration-isolated mounting
  • Airflow uniformity provisions
  • Laminar flow maintenance
  • Resonance dampening 
  • Structural rigidity
  • Leak-free construction
  • Removable access panels
  • Filter replacement access
  • Tool-required access
  • Differential pressure gauge ports 
  • Photohelic gauge mounting
  • Inspection window
  • Airflow capacity – 250-1500 CFM
  • Face velocity – 90 FPM (±20%)
  • Operating Temperature – 0°C to +60°C
  • Humidity resistance – Up to 95% RH
  • Static pressure rating – Up to 2.5″ W.C.
  • Diffuser options (perforated/non-perforated)
  • ISO 14644 (Cleanroom Standards)
  • IEST RP-CC001 (HEPA/ULPA Filters)
  • EU GMP Annex 1 (Cleanroom Manufacturing)
  • FDA 21 CFR Part 211 (cGMP)
  • NSF/ANSI 49 (Biosafety Cabinetry)
  • CE Marked  
  • ISO 9001:2015 Manufacturing

Technical Advantages

HEPA filter effectiveness depends on preventing unfiltered air from bypassing filter media through gaps between filters and housing frames. Addressing this critical requirement, continuous gel seal channels compress against filter perimeters creating zero-leak interfaces validated through aerosol challenge testing. Precision-machined filter mounting frames maintain dimensional tolerances ensuring consistent compression across gel seal surfaces. 

Airflow uniformity across filter face areas directly affects laminar flow quality in critical zones below terminal boxes. Internal diffuser plates distribute incoming plenum air evenly across filter upstream surfaces preventing velocity variations that create turbulent mixing zones. Moreover, differential pressure tap fittings enable continuous monitoring of filter pressure drop indicating when loading reaches replacement thresholds maintaining system performance. 

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Industry Applications

Sterile Fill-Finish Suites

Delivers filtered air to Grade A filling zones maintaining unidirectional airflow protecting vials and syringes during aseptic operations.

Biological Safety Cabinets

Supplies HEPA-filtered air to laminar flow workstations protecting personnel and products during microbiological manipulations.

Isolator Systems

Provides filtered air supply to pharmaceutical isolators maintaining positive pressure and particulate control during sterile compounding.

Operating Room HVAC

Creates laminar airflow zones over surgical tables reducing surgical site infections through continuous filtered air delivery. 

Semiconductor Cleanrooms

Maintains submicron particle control in wafer fabrication facilities where contamination causes device failures and yield losses. 

Pharmaceutical Packaging Lines

Supplies filtered air to blister packaging and bottle filling equipment preventing particulate contamination during primary packaging. 

HEPA Filter Terminal Boxes

Engineered for Air Quality

Cleanroom airflow requirements vary from simple ceiling diffusion in ISO Class 7 areas to unidirectional laminar flow in Grade A aseptic cores. HEPA Filter Terminal Boxes arrive in standard 2×2, 2×4, and 4×4 foot configurations with airflow capacities from 250 to 1500 CFM matched to room air change requirements. 

Seismic bracing provisions meet healthcare facility requirements in earthquake-prone regions preventing filter housing displacement during seismic events. Frigate manufactures terminal boxes supporting both bag-in/bag-out safe-change filter systems and standard gasket-sealed filters with documentation. 

HEPA Filter Terminal Boxes

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What continuous gel seal specifications does Frigate engineer in HEPA Filter Terminal Boxes achieving zero-leak interfaces during aerosol challenge testing?

Frigate designs continuous gel seal channels with controlled depth and profile to maintain uniform knife-edge engagement around the full filter perimeter. Gel hardness and compression targets are selected to meet aerosol challenge test criteria without creating voids or uneven sealing pressure. 

How does Frigate maintain precision-machined filter mounting frames in HEPA Filter Terminal Boxes ensuring consistent compression across gel seal surfaces?

Consistent seal compression is achieved through – 

  • CNC-machined mounting frames with tight flatness tolerances 
  • Controlled knife-edge geometry around the entire opening 
  • Dimensional inspection of mating surfaces 

Frigate aligns machining tolerances to the selected gel seal system and filter size. 

Do internal diffuser plates distribute incoming plenum air evenly preventing velocity variations across filter upstream surfaces?

Yes. Internal diffuser plates are used to reduce localized air velocity and spread airflow uniformly across the filter face. This minimizes turbulence, supports laminar flow performance, and helps extend filter service life in critical environments. 

What differential pressure tap fitting locations does Frigate integrate in HEPA Filter Terminal Boxes enabling continuous filter loading monitoring?

Pressure monitoring provisions may include – 

  • Upstream and downstream tap locations 
  • External connection points for magnehelic gauges or transmitters 
  • Clear separation from airflow paths to avoid sensing errors 

Tap placement is coordinated so maintenance teams can track filter loading trends, with Frigate incorporating site preferences. 

How does Frigate validate airflow uniformity in HEPA Filter Terminal Boxes maintaining laminar flow quality in critical zones?

Airflow uniformity is validated through factory airflow analysis and field-adjustable balancing features. Frigate supports uniform velocity distribution by combining diffuser design, plenum depth control, and outlet geometry aligned to cleanroom airflow requirements. 

Are seismic bracing provisions compatible with healthcare facility requirements in earthquake-prone regions?

Seismic compatibility may include – 

  • Reinforced housing panels 
  • Structural attachment points for building bracing 
  • Load calculations aligned to regional codes 

Frigate adapts reinforcement features based on seismic classification and ceiling grid constraints.

What bag-in/bag-out safe-change filter system specifications does Frigate accommodate in HEPA Filter Terminal Boxes for hazardous material containment?

Safe-change configurations can support – 

  • Fully enclosed bag-in/bag-out housings 
  • Glove-access ports for controlled handling 
  • Compatibility with industry-standard change bags 

Frigate sizes and integrates these systems based on containment level and filter dimensions. 

How does Frigate address leak-tight construction in HEPA Filter Terminal Boxes preventing bypass airflow around filter edges?

Leak-tight performance is achieved by combining continuous weld construction, sealed frame interfaces, and uniform gel seal compression. Attention is given to corner integrity and frame alignment to eliminate bypass paths during operation. 

Do factory aerosol testing reports accompany terminal boxes supporting cleanroom validation and installation qualification activities?

Validation support can include – 

  • Factory aerosol leak test reports 
  • Airflow and pressure verification data 
  • Filter seating inspection records 

Frigate prepares test documentation to align with installation qualification and cleanroom validation protocols. 

What airflow capacity ranges does Frigate specify in HEPA Filter Terminal Boxes matching ISO Class 3 through Class 7 air change requirements?

Airflow capacity selection typically considers – 

  • Required air changes per hour 
  • Filter face velocity limits 
  • Room size and cleanliness class 

Frigate specifies airflow ranges to support ISO Class 3 through Class 7 environments based on room design inputs. 

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Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

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9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Other Locations

  • Bangalore
  • Chennai
  • Coimbatore
  • Germany
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HEPA Filter Terminal Boxes

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