Acoustic barriers for data centres, cooling and back-up generators
Data centres combine several noise sources that together can cause serious nuisance: fans in server halls, UPS systems and transformers, 24/7 cooling systems, diesel back-up generators and air intake/exhaust openings. Especially at night this carries far, leading to recurring complaints and stricter VLAREM enforcement in areas like Zaventem, Diegem and Brussels North. Noise Solutions designs acoustic barriers and enclosures that bring emissions at the property line below the legal limit.
Why data centres cause noise
A data centre stacks five sources on top of each other. Servers, switches and storage run continuously with fans that produce a high-frequency, broadband rushing sound. UPS systems, transformers and electrical distribution units create a continuous humming or buzzing sound, often with clear low frequencies. Cooling systems such as chillers, dry-coolers, condensers, cooling towers, pumps and large fans are usually the main permanent source to the surroundings. Diesel back-up generators are very loud during tests or power outages, with exhaust noise, engine noise and vibrations where low frequencies travel far. Finally, noise from servers and fans can leak outside through grilles, doors or air ducts.
Back-up power and gensets
Emergency power units do not run continuously, but they do fire up during weekly or monthly load tests, grid outages and black-start events. At those moments emissions spike. See our dedicated back-up power and CHP page for the full genset approach.
Legal framework
Data centres fall under VLAREM class 1 or 2. Property-line limits are strict, especially at night (35 to 45 dB(A)). An acoustic study is mandatory for the environmental permit and is routinely checked by the environmental inspection. The night limit also drives when generator tests can be scheduled.
Our approach
Custom design: absorbing Noise-Reducer barriers around the chiller deck, fire-resistant rock wool enclosures with exhaust silencers around the diesel gensets, acoustic louvres for air intakes and exhaust openings, and if needed a second-line barrier at the property boundary. Everything modular and fully accessible for maintenance and inspections.
Result
Reduction up to 20 dB at the property line for cooling, generator sets, transformers and ventilation noise, VLAREM-compliant at night, while preserving the required airflow and exhaust flow. Measurement report on delivery for the environmental file.
Recommended materials
Noise-Reducer panels
High absorption and isolation for chiller and ventilation noise.
Rock wool enclosure with exhaust silencer
Around diesel gensets and transformers, fire-resistant, with absorption splitters on the exhaust.
Acoustic louvres
Air through, sound against, for intakes and exhaust openings.
Steel support structure
Robust for rooftop installations under wind loads.
Ready for peace?
Request your free consultation today. Our experts will analyse your situation and recommend the best solution, completely free of any obligation.