Nelson Noise from Specific Sources: HVAC & Mechanical Noise Rules (2026)

In unincorporated Clark County, HVAC condensing units, rooftop package units, and evaporative cooling equipment are treated as stationary noise sources under Title 30 Section 30.68.020. Because desert summer temperatures routinely exceed 110 F and AC runs essentially around the clock, nighttime compliance is the hardest bar: condensers must stay below 37 dB at 1000 Hz at the receiving residential property line. This typically means setting the condenser at least 5 to 10 feet from the shared wall, using a modern variable-speed compressor, and installing an acoustic blanket or block wall where the lot line is close. Commercial rooftop units on strip centers in Spring Valley, Paradise, and Enterprise that abut residential neighborhoods must also meet the 37 dB night limit because the boundary rule pulls in the stricter residential standard. Title 15 building code and the mechanical permit process are the front-line controls; Code Enforcement handles post-installation complaints. Under CCC Title 30.20 zoning setbacks, mechanical equipment cannot be placed in required side-yard setbacks on some small lots.