Carbon Monoxide Poisoning

Symptoms of carbon monoxide poisoning:

Headache
Dizziness
Nausea
Flu-like symptoms, fatigue
Shortness of breath on exertion
Impaired judgment
Chest pain
Confusion
Depression
Hallucinations
Agitation
Vomiting
Abdominal pain
Drowsiness
Visual changes
Fainting
Seizure
Memory and walking problems

Ross has been having some of these symptoms for the last few weeks and as soon as he leaves his house he's fine. His smoke/co detector has gone off and when it does, he airs out the house. But then it got really bad- and I started feeling sick, too. I was in the house attempting to eat dinner (without success because I, too, was feeling nausea), and he came back to the room. The moment he did, the alarm went off and he began to vomit. Once he got outside he thought about it and did a second of research and found out that every symptom listed is what he's had for the last few weeks.

... luckily PC equipped us with the detector and told us what to do if this happens (which is actually quite frequent due to the sobas). Now we have to figure out what to do to keep the house warm.