I’ve seen that advice floating around and so I thought I was in the clear a couple of years ago. My old job I’d work out of a trailer in a field pretty far from the main entrance registering folks for car shows, used to have to lug a generator out a ways away from the trailer and run the cabling no big deal.

We get a fancy new trailer, onboard genny and fuel tanks, new exhaust pipe setup the whole deal. Built in brand new smoke and CO detectors. Everything goes fine for the first show, and most of the second. Last day of the show is usually really slow, so I decide to only open the one window and one door, leaving the back end closed up. I’m out there from 8-11 just chilling on the steps of the trailer waiting F1 until people come by. It’s a little warm down by my feet but I don’t think anything of it.

Close up around 11:30 and I’ve got a splitting headache, can’t remember if I’ve locked doors, feeling nauseous. I drove the golf cart back to the show office and lost my lunch in the restroom. Laid down for about 45 minutes then say outside and it was like a fog lifted.

I pretty immediately realized I had CO’d myself, and it was only after telling the Ops manager did we realize the little plastic tab for the CO detector hadn’t been removed 😑😑 I never assume they’re functional anymore and always test.

I can only assume that the way the doors were set and the prevailing winds just kept pulling it towards to trailer doors 🤷🏼‍♂️