Portable and standby generators in New York County must comply with NYC Admin Code 24-232 HVAC equipment limits and DOB emergency generator permit conditions that include sound attenuation.
Generator use in Manhattan spans from hospital and high rise emergency standby units to portable generators used during construction and film production. All are subject to NYC Noise Code section 24-232, which caps circulation and mechanical device contributions at 42 dBA inside adjacent residences at night and 45 dBA during the day. Permanent standby generators additionally require a NYC Department of Buildings permit filed under Mechanical Code which mandates sound attenuation review. Weekly test cycles, commonly required by NFPA 110 for Life Safety generators, must be scheduled during the day, typically between 9 AM and 5 PM, and cannot exceed 30 minutes continuous operation. Film and television production generators must be listed on the Mayor Office of Media and Entertainment permit and cannot operate in residential districts between 10 PM and 7 AM without specific approval. Portable gas generators used by street vendors or construction crews are prohibited from continuous residential use and are cited frequently during summer months. Fines start at 440 dollars, and production companies routinely face 1,200 dollar plus penalties for after hours generator operation.
Contact your local code enforcement office for specific penalty information.
See how New York County's generator noise rules stack up against other locations.
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