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TOWER NOISE
Rooftop mechanical equipment offers practical advantages in building design, but the connected ductwork can become a significant source of interior sound transmission. As rooftop chillers and air handlers push conditioned air into vertical duct risers, turbulence increases along the duct interior. This turbulence causes the metal duct walls to vibrate, creating radiated mechanical hum that travels downward into occupied spaces. Effective HVAC sound attenuation systems must address this transmission pathway directly.
Over long vertical runs, even moderate breakout radiation becomes noticeable in offices, healthcare facilities, and retail environments. Thin sheet metal ducts amplify vibration, increasing HVAC duct breakout noise during peak airflow conditions. Rooftop equipment enclosures do not prevent this internal radiation from spreading through the building.
Adding mass and absorption directly to duct surfaces reduces radiated sound at its source. This approach minimizes both airborne and vibration-related transmission, improving overall commercial HVAC sound reduction performance. Treating the distribution system ensures that mechanical efficiency does not compromise acoustic comfort.
DuctaSil® B10Lag1™ Pipe & Duct Barrier System provides high-mass sound blocking combined with absorptive damping. By reducing duct surface radiation, it significantly enhances building acoustic performance in facilities relying on rooftop mechanical systems.
Proactively addressing rooftop duct connections protects occupant comfort while maintaining system performance and energy efficiency.
