Restaurants / Nightclubs

Fire safety & acoustics – prevention through material selection

Phase 01: The Problem

The challenge: soundproofing without fire risk

In publicly accessible areas and for technical outdoor installations (such as heat pump enclosures), safety is paramount. Conventional solutions often rely on porous absorbers, which, however, exhibit critical weaknesses under extreme conditions – as demonstrated by the tragic events in Switzerland (New Year's Eve 2025):

  1. Fire load:Porous plastics and nonwovens can act as fire accelerants as soon as an ignition source (e.g. pyrotechnics or short circuit) occurs.
  2. Toxicity:The decomposition of organic insulation materials produces life-threatening fumes.
  3. Pollution:Over the years, open-pored structures accumulate combustible dust and grease (wick effect).
Phase 02: The Solution

The analysis: Why HSA3 makes the difference

To proactively eliminate these risks, the use ofmetallic, micro-perforated sound absorbers (HSA3)It has been examined as a safety standard. Unlike organic foams, HSA3 is based on pure physics rather than on flammable material volume.

The decisive advantages for safety

  • Non-flammability (Class A1):HSA3 is made of aluminum or stainless steel. The material is completely non-combustible, produces no smoke, and does not contribute to fire spread.
  • Protection against external ignition:The smooth metal surface offers no point of attack for sparks or glowing particles. Where porous materials would immediately catch fire, HSA3 acts as a physical heat shield.
  • Hygiene & Cleanliness:The smooth surface prevents the accumulation of fire-promoting deposits in the material. The micro-perforated structure remains clean and maintenance-free.
  • Constant acoustics:While conventional insulation materials change their structure when exposed to moisture or heat, the absorption performance of HSA3 remains stable and safe for decades.
Phase 03: The Impact

The result

The comparison clearly shows that sound insulation must now be considered holistically. By using Absora HSA3, acoustic requirements are met without increasing the fire load of a building or facility. It is the technical answer to the need to understand safety not just as a standard, but as an inherent material property.

"Choosing the right absorber material is a decision for safety. Metallic solutions like HSA3 eliminate the risk posed by flammable foams, thus protecting human lives in an emergency."

Applications:

  • Restaurants & Assembly Venues:Reliable sound insulation on ceilings and walls.
  • Technical enclosures:Protection of heat pumps and air conditioners against vandalism and fire spread.
  • Industry:Acoustic solutions in thermally sensitive areas.

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