How loud is a whole house generator?

Whole house generators typically produce 60-70 decibels at 23 feet (7 meters), which is comparable to normal conversation or light traffic noise. The actual noise level depends on the generator size, brand, and installation location.

Generator Noise Levels by Size:
Smaller units (10-16kW) generally run quieter at around 58-65 dB, while larger generators (20-26kW) typically operate at 65-72 dB. Premium brands like Generac's QuietSource series and Kohler's residential units are specifically designed for quieter operation, often 5-10 dB quieter than standard models.

Installation Makes a Huge Difference:
Proper placement significantly impacts perceived noise. Generators should be installed at least 5 feet from windows and preferably on the side of your home away from bedrooms and neighboring properties. A concrete pad helps reduce vibration noise, and some homeowners add sound barriers like fencing or landscaping for additional noise reduction.

ESA and City of Ottawa Requirements:
In Ottawa, whole house generators require ESA permits and must comply with city noise bylaws. The generator must be installed by an ESA-licensed electrician and positioned to meet setback requirements from property lines and buildings. Most residential generators easily meet Ottawa's daytime noise limits (55 dB at property line), though nighttime limits are stricter at 45 dB.

Noise Comparison for Context:
To put this in perspective, 65 dB is quieter than a dishwasher (70 dB) or air conditioner (75 dB). Most neighbors won't find a properly installed generator objectionable, especially since it only runs during power outages or weekly maintenance cycles (typically 15-20 minutes).

Maintenance and Noise:
Regular maintenance keeps generators running quietly. Dirty air filters, low oil, or worn components can increase noise levels significantly. Most generators run a brief weekly test cycle, usually during daytime hours when noise is less noticeable.

For a free consultation on whole house generator installation in Ottawa, including optimal placement for minimal noise impact, Electrical Ottawa can assess your property and recommend the best solution for your needs.