San Ramon, CA Noise from Specific Sources: HVAC & Mechanical Noise (2026)

" The section is not limited to HVAC alone: it reaches any pump, fan or mechanical device operated for a commercial purpose, but rooftop and ground-mounted air conditioning condensers on commercial and multi-family buildings are the equipment most commonly cited under it. The muffling requirement is absolute rather than tied to a decibel table: if the device "creates noise" and lacks a muffler sufficient to deaden it, operating it violates the section regardless of the exact sound level measured at the property line. Complaints about a noisy rooftop unit or condenser are also evaluated against the general B6-83 nuisance factors, including proximity to residential sleeping areas and the time the equipment runs.

A business owner can seek a permit exempting a specific use from Chapter V under section B6-84 if the city manager finds the use is not detrimental to public health, safety or welfare, subject to annual review and a 10-day appeal window to the city council.