Hacker News Reader

CO poisoning is cumulative. It takes a long time for CO to get unstuck from hemoglobin. It could have snuck up on them slowly, then one evening with the cats "napping" they felt particularly tired and thought to themselves, "We must be in hibernation mode from the chilly weather," then they went to sleep then never woke up.

CO is odorless. You might get a headache, or you might only feel tired. What's worse: a lot of CO detectors are pretty shoddy.

View on HN

Your description makes me increasingly worried; do you have any preferred CO detectors?

Avoid cheap ebay stuff. I think Consumer Reports have done a rating of those devices sometime. However, that might be out of date at this point. I just did a search on YouTube, and even those random reviews seem to date from 2014. There should be a way to verify those. Maybe Cody's Lab could handle this?

Reply on news.ycombinator.com