Generator Safety and Carbon Monoxide Risk
Carbon monoxide (CO) is the silent killer gas. Colourless, odourless, and tasteless — you inhale it without knowing until you lose consciousness. A generator produces lethal quantities of CO. Every year deaths occur in Egypt from generators run inside homes or garages.
By the Ases Kahraba team — Last updated: February 2026
Quick Answer
Generator safety and carbon monoxide risk guide — why it's a silent killer, safe installation locations, and necessary alarm devices.
Essential Generator Safety Rules
- Outdoors always: the generator must run in the open air — not in the garage, not in the hallway, not in an enclosed room even with a small ventilation opening. CO accumulates rapidly even with partial ventilation.
- Safe distance: at least 3 metres from any window, door, or ventilation opening. Exhaust pointed away from the building. Even a wall open on one side is insufficient.
- CO detector at home: essential for any home with a generator or gas heater. Place it near bedrooms at 1.5 m height. Check batteries monthly and replace the device every 5–7 years.
- CO poisoning symptoms: mild headache initially, then dizziness and nausea, then loss of consciousness. If you feel symptoms with a generator running — go outside immediately and call emergency services.
- Safe operation rules: don't run the generator in rain without an appropriate cover. Turn it off before adding fuel. Let it cool before covering or storing.
- Fatal mistakes: running the generator inside the garage with the door open (CO enters the house), running it on an enclosed balcony, and ignoring headache symptoms while the generator is running.
Frequently Asked Questions
What CO concentration is dangerous to humans?
35 ppm: maximum safe level for 8 hours (OSHA standard). 200 ppm: severe headache after 2 hours. 800 ppm: unconsciousness and death within 2–3 hours. 1,600+ ppm: unconsciousness within 20 minutes. A diesel generator produces 1,000–10,000 ppm in exhaust.
Can I run the generator in the garage with the door open?
No — this is one of the most common fatal mistakes. CO accumulates in the garage and seeps under house doors. Even with the door fully open, airflow may push CO toward the house.
Do smoke detectors also detect CO?
No — smoke detectors detect visible combustion particles. CO is colourless gas that a smoke detector cannot sense. You need a separate CO Detector or a combined smoke + CO unit.
Is a CO detector available in Egypt?
Yes, CO detectors are available in markets and electronics stores at EGP 200–800 depending on brand. Certified brands recommended (Kidde, First Alert, Siterwell).
What should I do if the CO detector sounds an alarm?
Exit immediately with all household members and pets — don't search for the gas source. Turn off the generator if possible without entering the hazardous area. Call 180 (Civil Defence). Don't re-enter until the home is fully ventilated.