HVAC noise falls under CMC Chapter 909. AC units, heat pumps, and ventilation must stay within permissible sound levels at the receiving property. Loud mechanical equipment near homes is restricted 9 PM to 7 AM.
HVAC equipment noise in Cincinnati is governed by the general community noise provisions of CMC Chapter 909. Section 909-3 sets maximum permissible sound levels by zoning district, measured as Leq dB(A) at the receiving property. Residential air conditioning condensers, heat pumps, and commercial rooftop units must operate within these limits. Section 909-7 restricts operation of mechanical apparatus producing loud sound within 500 feet of residences between 9 PM and 7 AM without a special permit, though continuously operating HVAC systems necessary for building climate control are generally treated as existing background sources rather than intermittent disturbances. New HVAC installations must comply with Cincinnati building code setback and placement requirements, which can affect noise impact on neighboring properties. Common complaints involve older or poorly maintained condensing units positioned near bedroom windows of adjacent homes. Property owners are responsible for ensuring their equipment does not create a nuisance.
Noise exceeding Section 909-3 table limits at the receiving property constitutes a prima facie violation. Minor misdemeanor for first offense. Contact Cincinnati 311 at (513) 591-6000 or the Buildings and Inspections Department to report persistent HVAC noise.
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