Norwalk considers limits on generators, lighting and testing for data centers
City staff recommended noise and lighting standards for data centers—addressing HVAC low‑frequency tones, limits on generator testing and foot‑candle lighting thresholds—and emphasized the need for enforcement and testing to confirm compliance.
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City staff told council that two kinds of noise are common concerns for data centers: continuous mechanical/HVAC fan noise (including low‑frequency tones) and noise from generator testing. "Those low frequency sounds, like, they don't get blocked as easily by a room or by trees or the land even," staff said, noting the potential for distant perceptible impact.
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