The Fix-It Playbook — Carbon Monoxide at Home

It's called the silent killer for a reason: no smell, no color, no warning — until an alarm is the only thing standing between a heating season and an emergency room.

Inside: Why winter is when CO risk actually rises · Where CO comes from, and where alarms need to be · Why CO poisoning gets missed · The honest cost comparison · When to stop and call a pro · Troubleshooting · Printable carbon monoxide checklist.

Doing it yourself: a battery-powered CO alarm runs $15–60; installing one yourself takes minutes.
Calling a pro: professional installation of hardwired alarms runs $150–360 per unit installed; a general electrical safety inspection runs $100–200.

6 pages of labeled diagrams, parts lists and real numbers — no filler, no 40-minute video. Temperatures and measurements in both Fahrenheit/Celsius and feet/meters, so it works wherever you are. Ends with a printable checklist.

Instant PDF download: print it for the garage or follow it on your phone with the parts in hand. Yours to keep, no subscription.

Need more than this one job? The Winter Safety Kit bundles all 5 winter safety guides — 24 pages — for $14.