CR II - Operating Theatre Ceiling HEPA Module


Special Features

  • Centre Opening for the Light Pendent
  • Rigid and Airtight Construction
  • Minimum Installation Height
  • Perforated Laminar Air Flow Diffuser
  • Circular side air inlet or top air inlet


The CR II module is suitable for installation of high efficiency particulate air filters, such as MEGAcel II and AstroCel II filter. The total installation height is up to 400 mm only. This housing is designed for use in areas where air quality has to be of extremely high-level.

The CR II module can be assembled to form an air-supply ceiling suitable for used extensively in hospital areas like operation theatres, associated preparation rooms, intensive care wards, and for class 1 areas as defined in DIN 1946, Part 4 (1989). Air quality at the supply i.e, at grill level will be Class 100/ISO Class 5(at rest condition)

The CR II module can also be used individually or as an air-supply ceiling in production areas in the pharmaceutical, food, and cosmetic industries as well as laboratories. The AAF CR II adheres to the guidelines illustrated by AISI.


The CR II module is made of high quality AISI stainless steel/GI/Aluminum and is characterized by its rigid, airtight construction. This module is connected to the air supply duct by a circular connecting inlet on side of the housing. The HEPA filter (MEGAcel II or AstroCel II) is positively positioned with the help of latches or locking clamps.

Laminar Air Flow Diffuser:

The diffuser has an installation height of only 20 mm. A stainless-steel/GI perforated plate with 55% free surface area is supplied as standard. As an option 35% free surface area diffuser can be offered.

HEPA Filter Option

AstroCel II:

• Individually tested for certified performance
• Available in H13 and H14 efficiency 99.95% – 99.995% at MPPS.
• Available with hot melt separators
• Lightweight and compact
• EN1822 Autoscan tested filters



  • Patent pending, polymer based, dual density, expanded fluororesin membrane – ePTFE/eFRM
  • Available in H13 and H14 efficiency 99.95%- 99.995% at MPPS
  • Reduces operating costs with lowest possible pressure drop from microfiber glass media
  • Polyalphaolefin (PAO) compatible
  • Lightweight anodized aluminum frame
  • Thermoplastic hot melt separates
  • EN1822 Autoscan tested filters

Typical Applications



EN1822H13 – U17
Filter Depth (mm)69
Media Type (Standard)Fibreglass
Media Type (Optional)eFRM
Frame MaterialAluminium
Seperator StyleHot Melt
Gasket Material (Standard)PU
Gasket Material (Optional)Neoprene, EPDM
Gasket PositionUpstream
Faceguard PositionBoth Sides
Antimicrobial AvailableNo
Recommended Final Resistance500 Pa
Max Operating Temperature70 ˚C
Air Filtration CertificateUL 900, FM 4920

Housing Specification

Housing Depth430 mm
Housing MaterialGI Finished with Epoxy Coated
Supply Air GrillePerforated
Supply Air Grille Material (Standard)GI Finished with Epoxy Coated
Supply Air Grille Material (Optional)Stainless Steel
Inlet Collar250 mm
Inlet DiffuserPrefixed Distribution Plate
Specific Size AvailableNo