Combison
Combison™ Duo A
System range
Size, mm
600x600
T24 •
Thickness 55
M85
System and product description
For use as a suspended ceiling with high sound absorption and for sound insulation between rooms if the partitions do not extend all the way up to the soffit. Also suitable for sound reduction of vertical noise, generated by ventilation, foot steps etc. Ecophon Combison Duo A has an exposed grid system. Each tile is demountable.

The system consists of Ecophon Combison Duo A tiles and Ecophon Connect grid systems, with an approximate weight of 14 kg/m². The tiles are manufactured from high density glass wool, with a bonded gypsum board (13 mm) on the back of the tile. The visible surface has an Akutex FT coating and the edges are primed. The grid is manufactured from galvanized steel.
Acoustics
Acoustic:
Sound Absorption: Test results according to EN ISO 354.
Classification according to EN ISO 11654, and the single value ratings for NRC and SAA according to ASTM C 423.
Sound Insulation: Dn,c,w=40 dB according to ISO 140-9 and evaluation according to EN ISO 717. CAC=44 dB according to ASTM E 1414 and evaluation according to ASTM E 413.
Sound Privacy: AC(1.5)=190 according to ASTM E 1111 and E 1110.
αp Practical sound absorption coefficient
Combison_Duo A_abs1 Frequency Hz
— Ecophon Combison Duo A 200 mm o.d.s.
o.d.s = overall depth of system
product Combison Duo A
o.d.s mm 200
absorption class A
Technical info
Accessibility: The tiles are easily demountable. Minimum demounting depth according to installation diagrams.
Cleanability: Daily dusting and vacuum cleaning. Weekly wet wiping.
Visual appearance: White Frost, nearest NCS colour sample S 0500-N, 85% light reflectance (of which more than 99% is diffuse reflection). Retro reflection coefficient 63 mcd*m-2lx-1. Gloss < 1.
Environmental influence: Fully recyclable
Indoor Climate: Recommended by the Swedish Asthma and Allergy Association.
Influence of climate: The tiles withstand a permanent ambient RH up to 75% at 30°C without sagging, warping or delaminating (ISO 4611).
Fire safety: The glass wool core of the tiles is tested and classified as non-combustible according to EN ISO 1182. The systems are classified as fire protective covering according to NT FIRE 003. See Technical properties, Fire safety.
Country Class Standard
Europe EN 13501-1 A2-s1,d0
Mechanical properties: For information regarding live load and requirements for load bearing capacity, see installation diagrams. Conditions: See Functional demands, Mechanical properties.
Installation: Installed according to system range.
For Acousticians
"Acoustical evaluation of rooms requires several room acoustic descriptors. Reverberation time alone is not enough!" Erling Nilsson / Acoustics Specialist Ecophon
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