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New York, NY Noise from Specific Sources: HVAC & Mechanical Noise (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Indoor limit
42 dB(A) inside dwelling unit
New/replaced units cap
45 dB(A) cumulative per lot
First violation fine
$220 flat penalty
Governing code
Noise Control Code § 24-227
Enforcement agency
Dept. of Environmental Protection

Summary

New York City limits sound from air conditioners, fans, pumps and cooling towers to 42 dB(A) inside a neighbor's dwelling unit, with a 45 dB(A) cumulative cap for newly installed or replaced units citywide.

No person shall operate or permit to be operated a circulation device in such a manner as to create a sound level in excess of 42 dB(A) when measured inside a receiving property dwelling unit. The measurement shall be taken with the window or terrace door open at a point three feet from the open portion of the window or terrace door.

Source: NYC Noise Code §24-227View official code

Full Breakdown

The NYC Noise Control Code regulates 'circulation devices', air conditioners, pumps, cooling towers, fans and blowers, under Administrative Code § 24-227. Operating one that creates sound exceeding 42 dB(A) inside a neighbor's dwelling unit, measured three feet from an open window or terrace door, is prohibited. For any circulation device installed or replaced after the section's 2021 effective date, the cumulative sound from every device the same owner controls on that building lot is capped at 45 dB(A). DEP investigates complaints and can order a 5 dB(A) reduction on pre-existing multi-device lots exceeding 50 dB(A).

Violations & Fines

First violation carries a flat $220 fine, rising to $440 for a second violation and $660 for a third or subsequent violation. The Environmental Control Board can also order the equipment sealed, repaired, or reduced in sound output.

Frequently Asked Questions

How loud can my air conditioner be under NYC law?
Under Administrative Code § 24-227, a circulation device like an AC unit can't create sound above 42 dB(A) measured inside a neighbor's dwelling unit, three feet from an open window or terrace door.
What counts as a 'circulation device'?
Any device that circulates gas or fluid, including air conditioners, pumps, cooling towers, fans and blowers, per the Noise Control Code's definitions in § 24-201.
What happens if my HVAC unit is too loud?
DEP can issue a notice of violation starting at $220, and the Environmental Control Board can order the device repaired, altered, or sealed until it complies.

Sources & Official References

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