Huntsville, AL Noise from Specific Sources: HVAC & Mechanical Noise (2026)
Key Facts
- Daytime residential limit
- 55 dB(A), 7am-10pm
- Nighttime residential limit
- 50 dB(A), 10pm-7am
- Commercial / industrial limit
- 62 dB(A) / 70 dB(A)
- Enforced by
- noise control officer
- Max penalty
- $500 fine or 6 months jail
Summary
Huntsville has no HVAC-specific rule, but its general noise ordinance caps sound from any fixed source, including air conditioners, heat pumps and condensers, at 55 dB(A) daytime and 50 dB(A) at night on residential property lines.
No person shall operate, cause to be operated or generate any source of sound in such a manner as to create a sound level which exceeds the following limits when measured at or within the property line of the receiving land use: Residential, public space open space, agricultural, institutional property: 7:00 a.m.—10:00 p.m., 55; 10:00 p.m.—7:00 a.m., 50. Commercial or business: 62, at all times. Industrial: 70, at all times.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 30 Update 2).
Full Breakdown
Chapter 12, Article V's community noise standard bans operating or generating 'any source of sound' that exceeds set decibel limits at the receiving property line, and a running condenser or heat pump qualifies as a sound source like any other. Residential, open-space, agricultural and institutional land gets 55 dB(A) from 7 a.m.-10 p.m. and 50 dB(A) overnight; commercial land is capped at 62 dB(A) and industrial at 70 dB(A) around the clock. The narrower 'domestic power equipment' exemption in Sec. 12-262(5), which allows up to 80 dB(A) daytime, covers only equipment rated 15 horsepower or less used for home repairs and grounds maintenance, not a permanently installed HVAC unit. The city's noise control officer, housed in the air pollution control office, enforces the limits and can grant a hardship waiver under Sec. 12-234.
Violations & Fines
Violating Sec. 12-265 is a misdemeanor punished under the Code's general penalty (Sec. 1-7): a fine up to $500.00, up to six months in jail, or both, with each day a continuing violation counted as a separate offense.
Frequently Asked Questions
Does Huntsville have a rule specifically for AC or HVAC noise?
How loud can a neighbor's outdoor unit be at night?
Sources & Official References
Other rules in Huntsville
Compare Huntsville to another location·View the Alabama noise from specific sources overview
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