When used properly, portable and standby generators are a great option for providing power during brownouts or blackouts. However, improper use and installation of generators can cause carbon monoxide poisoning, make sure to always keep generators at least 20 feet away from doors and windows. Never operate a generator in an enclosed space. Make sure you have carbon monoxide detectors on every level of your home. If you experience dizziness, headaches, nausea, or tiredness, immediately go outside for fresh air and call 911.