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NBS Source


  • Computer Rooms.
  • Clean room environments.


Lay-in mineral ceiling tile with a special polyester membrane finish providing high ISO clean room performance.

Features and benefits:

  • Choice of size.
  • Does not attract dust.
  • Adapted to regular cleaning.
  • Suitable for ISO 5 cleanrooms when used with cleanroom grid.
  • Suitable for use in computer environments.
  • Suitable for environments up to 95% relative humidity.
  • 15-year product guarantee.
  • 30-year system guarantee.
  • Low volatile organic compound (VOC) emissions, A+ rating.
  • Manufactured using 39% recycled material.
  • 100% recyclable.

Load capacity:

  • Varies with layout, grid type, tile selected and hanger spacing. Consult manufacturer's technical sales department for details.
  • Fittings exceeding the load capacity or with dynamic characteristics (such as air diffusers) will need independent suspension.


Compatible grids, by edge detail. To be specified separately; consult manufacturer for details.

  • Clean Room 24: Exposed 24 mm co-extruded grid system for clean rooms and non-magnetic areas.
  • Prelude 24 TLS: Exposed 24 mm grid.
  • Prelude 24 XL²: Exposed 24 mm grid.
  • Prelude 24 mm corrosive resistant grid. Recommended when system is to be installed in areas >90% RH.


  • Computer Rooms.
  • Clean room environments.

General information


Pr_35_93_13_53 Mineral fibre infill unitsPrimary


K40/10 Unit/ modular suspended ceilings

K40/105 Suspended ceiling system

K40/115 Unit/ modular suspended ceiling system

Product range

Special Application Tiles

Specification data - Mineral fibre infill units

Product Reference

Data Centre Clean Room FL


Insert requirements. Consult manufacturer for BIM/ CAD details.

Edge detail


Module size (w x l, nominal)

600 x 600 mm

1200 x 600 mm

Standard product features


15 mm.


Global white.

Edge detail:

Lay-in square edge for 24 mm grid.

Technical characteristics:

  • Weight (approximate): 5.3 kg/m².
  • Light reflectance value (LRV): 78%.
  • Thermal conductivity: 0.06 W/m·K.
  • Reaction to fire: Euroclass A2-s1, d0.
  • Clean room classification to ISO 14644-1: ISO 5.
  • Formaldehyde emissions: E1.
  • Sound absorption class: E.
  • Sound absorption noise reduction coefficient (NRC): 0.1.
  • Acoustic absorption (weighted sound absorption coefficient): αw = 0.15.
  • Acoustic attenuation (weighted suspended ceiling normalized level difference): Dnfw = 36 dB.

Acoustic absorption:

Weighted sound absorption coefficient (alpha w). Rating for random incidence sound absorption determined in accordance with EN ISO 11654. Measured values obtained in accordance with EN ISO 20354 are converted into octave bands, plotted on a graph and compared to a standard reference curve until a 'best fit' is obtained. The derived αw will vary between 0.00 and 1.00.

Acoustic attenuation:

Dnfw rating derived from laboratory measurement of room-to-room airborne sound insulation of suspended ceiling with plenum above. Rating determined in accordance with EN ISO 717-1 from measurements made in accordance with ENIS0 10848-2 over the third-octave band frequency range 100–3150 Hz.

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