Yorba Linda, CA Noise from Specific Sources: HVAC & Mechanical Noise (2026)

Yorba Linda's Chapter 8.32 defines air conditioners and refrigeration equipment as a type of fixed noise source under Section 8.32.020, alongside pumps, fans, compressors and generators, all of which are ordinarily held to the same 55/50 dB(A) exterior and 45-55 dB(A) interior limits as any other noise source under Sections 8.32.060 and 8.32.070. Section 8.32.110 carves out a temporary allowance for that equipment: for five years after the effective date of the ordinance, the exterior and interior noise standards in Sections 8.32.060 and 8.32.070 are increased by 8 dB(A) where the offending noise source is an air-conditioning or refrigeration system, or its associated equipment, that was installed before the ordinance's effective date.

New AC and refrigeration equipment installed after that date gets no such allowance and must meet the ordinary decibel limits from day one. Once the five-year grace period passes, pre-existing equipment loses the extra 8 dB(A) cushion and must also meet the standard limits, unless it separately qualifies for the variance procedure in Section 8.32.120, which lets an owner apply to the Noise Variance Board for additional time to come into compliance. Any noise, including from HVAC or refrigeration equipment, that exceeds the applicable limit is a misdemeanor under Section 8.32.200, with each day of continuing violation a separate offense, enforced by the County Health Officer under Section 8.32.030.