Hi, Firstly, this post may sound a little paranoid and I admit that and I know little about central heating or anything like that... But my question is how possible (or impossible) is it to get carbon monoxide poisoning from central heating and where would it leak from? Can it leak from radiators or just boilers? Is there any way it can leak into your bedroom? I guess I'd like someone to put my mind at ease. I was ill the other night very quickly... feeling sick, dizzy, chest hurting, breathlessness, etc. It got quite bad and I had to stand outside and take in the fresh air. I also have dry patches on my skin and I woke up the other day with a very dry throat that's keeping me up at night. So what could cause this? Bad ventilation? I do spend a lot of time in my room and the heating makes it stuffy. The windows were blocked with tissue because of cold drafts (not anymore now) Thanks.