A Practical Guide for Data Center Contractors
Data centers are among the most demanding build environments in modern construction. Timelines are aggressive, performance expectations are exacting, and the mechanical systems that power these facilities, such as chiller banks, cooling towers, rooftop HVAC units, and backup generators are substantial. They’re also loud.
For contractors working on data center projects, noise control has become one of the more consequential challenges on the job. Not because it’s complicated in isolation, but because when it’s overlooked early in the planning process, it creates real downstream problems: failed inspections, community complaints, costly redesigns, and project delays that affect everyone.
Here’s what contractors need to know.
Why Data Centers Generate So Much Noise
Unlike a standard commercial building, a data center runs continuously. Twenty-four hours a day, 7 days a week. The mechanical and electrical systems required to cool and power thousands of servers operate without interruption, and they generate a significant amount of noise in the process.
The primary noise sources on a typical data center site include:
- Chiller banks and cooling towers that run around the clock to maintain critical temperature thresholds inside the facility
- Rooftop HVAC units that concentrate large amounts of mechanical equipment in one place, projecting noise outward in multiple directions
- Backup generators required for redundancy, which are tested regularly and can produce significant noise events
- Air handling equipment and ventilation systems that move massive volumes of air to keep servers cool
What makes data center noise particularly challenging is the frequency range. Much of the sound produced by chiller systems and large cooling equipment falls in the low-frequency range—below 250 Hz. Low-frequency noise behaves differently than higher-pitched sounds. It travels farther, penetrates barriers more easily, and remains audible even at distances where higher frequencies would dissipate. That’s why a data center built near a residential neighborhood can create complaints from residents several hundred feet away.
Low-frequency noise from data center equipment can travel well beyond property lines—making early noise planning a project-critical decision, not an afterthought.
The Real Consequences of Ignoring Noise Control
The business case for addressing noise control early is straightforward. When it isn’t handled proactively, the fallout tends to be expensive and hard to undo.
According to industry reporting, billions of dollars in U.S. development projects have been blocked or delayed due to community opposition, with noise cited as one of the primary concerns. Data center construction, given its scale, 24/7 operation, and proximity to residential areas in many markets, is increasingly at the center of that tension.
For contractors, the practical consequences include:
- Compliance failures when equipment noise exceeds local ordinances or zoning requirements, often discovered late in the project
- Costly retrofits when noise issues are addressed reactively rather than as part of the original design
- Project delays triggered by permit holds, regulatory review, or required design changes
- Community opposition that can slow approvals and create reputational risk for the contractor and the client
None of these are theoretical. They happen on real projects. And they’re largely avoidable when noise control is integrated into the project from the start.
Noise Control Solutions for Data Center Projects
The good news is that industrial noise control technology has advanced considerably. There are proven, purpose-built solutions for the specific challenges data center environments present. The key is selecting the right combination of systems for the site conditions, equipment layout, and local requirements.
Here are the primary solutions used on data center projects:
Acoustical Louvers
Acoustical louvers are installed at air intake and exhaust openings to reduce noise transmission while maintaining the critical airflow that mechanical systems require. For chiller banks and large HVAC systems, they’re often the first line of defense—allowing ventilation to function without sending noise into the surrounding environment. They can be integrated into the building envelope cleanly, without major architectural modifications.
Barrier Walls
Barrier walls intercept sound waves and redirect them away from sensitive areas such as residential neighborhoods, adjacent commercial properties, or public spaces near the facility. They’re especially effective for managing the directional noise that comes off rooftop equipment and facility perimeters. Height, placement, and material are all engineered based on the specific site layout and the frequencies being addressed.
Ventilation Silencers
Rather than blocking noise after it escapes, ventilation silencers treat the problem at the source—within the ductwork and airflow systems themselves. For large air handling systems common in data centers, this approach can significantly reduce the noise footprint of the facility without compromising airflow rates or system efficiency.
Chiller Stacks and Pergolas
These purpose-built structures are designed specifically to reduce noise from rooftop equipment—including the chiller systems that are a defining feature of most large data centers. They integrate with the building’s architecture while providing meaningful acoustic performance, making them a strong option for facilities where aesthetics and sound control need to coexist.
Environmental Noise Blankets and Sound Curtains
For equipment that needs temporary or portable noise treatment, such as generators during testing cycles, compressors, or specific mechanical units, noise blankets and sound curtains offer flexible, effective solutions. They can be deployed quickly, repositioned as needed, and removed without modifying the underlying equipment. Sound curtains are also commonly used during construction phases or retrofits where traditional barriers aren’t yet in place.
These solutions aren’t one-size-fits-all. The right combination depends on the specific site, equipment configuration, and local noise requirements, which is why working with an experienced partner matters.
Why Early Integration Makes All the Difference
One of the most consistent lessons from data center noise control projects is that early integration of acoustic solutions is far more effective—and far less expensive—than reactive fixes.
When noise control is part of the design conversation from the beginning, solutions can be engineered to work within the existing layout. Barrier walls can be positioned based on equipment placement. Louvers can be specified as part of the mechanical design. Silencers can be incorporated into ductwork runs before the building envelope is closed.
When it’s addressed after the fact, the options narrow. Retrofitting acoustic solutions into a completed data center is technically possible, but it typically costs more, takes longer, and creates integration challenges that wouldn’t exist with upfront planning.
For contractors, that means asking about noise control early and making sure the right expertise is at the table when design decisions are being made.
Collaborate with Ketchum and Walton, a noise control partner that understands data centers.
The scale of the mechanical systems, the 24/7 operating requirements, and the sensitivity of surrounding communities make these projects distinct from standard industrial or commercial applications.
At Ketchum & Walton Co., we work directly with acoustical consultants and contractors on data center projects to provide noise control solutions that are engineered for real-world site conditions and delivered on timelines that keep projects on track. We stay involved from early planning through installation, so that when issues come up (and they do), there’s an expert in your corner to help resolve them.
Whether you’re in the early stages of design or already deep into a build, we’re here to help you get ahead of noise challenges before they become problems.