Carbon-Monoxide Alarms and Generator Safety
Last verified: September 2026
Carbon monoxide is the quiet danger of an outage — invisible, odorless, and preventable. Here's how alarms and a few firm rules keep your home's air safe. Want help getting set up? Call (330) 200-8042.
Carbon-Monoxide Safety, at a Glance
Carbon monoxide is the quiet danger of an outage. It's invisible and odorless, and it comes from the very things people turn to when the power's out — generators, grills, and heaters used where they never should be. Every year it kills dozens of people during outages, almost always preventably. This guide covers the alarms that give you early warning and the outdoor-only rules that keep the air in your home safe. An open door or a fan does not make an enclosed space safe — outside and far away is the only safe place. There's a printable 29-page version up top.
Common Questions
1 Where should I place carbon-monoxide alarms?
On every level of your home, including the basement, and outside each sleeping area so one can wake you. Follow the maker's placement instructions, and choose alarms with battery backup so they keep working during an outage.
2 Can I run a generator in the garage with the door open?
Never. An open door or a fan does not make an enclosed space safe. A generator belongs outdoors only, at least 20 feet from the house, with the exhaust pointed away from every window, door, and vent — yours and the neighbor's.
3 What are the symptoms of carbon-monoxide poisoning?
It often feels like the flu without a fever — headache, dizziness, weakness, nausea, confusion, and sleepiness — frequently in several people or pets at once. If you suspect it, get everyone to fresh air first, then call 911 from outside.
4 Does a generator's automatic CO shutoff make it safe to run indoors?
No. The automatic shutoff on units built to the PGMA G300 or UL 2201 standards is a helpful backstop, but the outdoor-only, 20-feet-away rule still applies. Think of it as a seatbelt, not permission to run the generator closer.
5 What other things make carbon monoxide in an outage?
Anything that burns fuel: grills, camp stoves, charcoal, and a running car engine. All must stay outdoors and away from the house and garage. Charcoal is especially deadly indoors and must never be brought inside.
6 How often should I test and replace CO alarms?
Test each one monthly with its button and change the batteries on schedule. The alarm itself wears out over several years, so check its replace-by date and swap the whole unit when it's reached.
Would You Rather I Just Help?
Carbon-monoxide safety is some of the most important help I offer. I'll help you place and test alarms and plan safe generator use, so your home's air stays safe through any outage. $99 flat for a visit, 30-day come-back-free.
Would you rather I just do this for you?
No shame in it — plenty of folks would rather hand it off, and that's what I'm here for. I'll come to your home, set it up right, and make sure it's working before I leave. Flat $99 per visit — no jargon, no upsell, and every visit is 30-day come-back-free.
Not a hardware job? I can often fix it remotely for $49 — a secure screen-share, up to 2 hours, that you watch the whole time and can end whenever (included free for $39/mo Support Plan members, and it counts toward the $99 if it turns out I need to come out).