Quick Answer
To calculate safe distances for generator use, consider the generator's power output, carbon monoxide (CO) emissions, and wind direction. A commonly recommended safe distance is 20 feet (6.1 meters) away from windows, doors, and ventilation openings. Use a CO meter to measure levels in the surrounding area.
Safe Distance Calculations
When calculating safe distances, consider the generator’s power output, as higher-powered generators produce more CO emissions. Typical residential generators range from 5 to 20 kilowatts (kW), with larger commercial generators exceeding 100 kW. For smaller generators (less than 10 kW), use the following safe distance guidelines: 10 feet (3.05 meters) for generators producing up to 3 kW and 20 feet (6.1 meters) for generators producing up to 10 kW.
Wind Direction Considerations
Wind direction is crucial when determining safe distances. CO can accumulate in low-lying areas and drift toward open windows or ventilation openings. When winds are calm or blowing from the generator’s location, reduce the safe distance by half. For example, if the generator is 20 feet away from a window with calm winds, consider it 10 feet away.
CO Meter Monitoring
To ensure safe generator use, install a CO meter near the generator and in areas where people will be spending time. CO meters detect CO levels in parts per million (ppm). Follow these guidelines to determine safe CO levels: 0-9 ppm is safe, 10-29 ppm poses a moderate health risk, 30-50 ppm poses a severe health risk, and above 50 ppm is life-threatening. Monitor CO levels regularly to adjust generator placement and operation as needed.
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