Carbon Monoxide is an odorless poisonous gas that can kill you within 5 minutes if it's in high enough concentration.
So it's advisable to have carbon monoxide detectors installed in your home and test them often to make sure they're working.
If your house has carbon monoxide inside it then you need to get outside into fresh air and call 911 right away because carbon monoxide poisoning is a serious thing and you should have yourself and any family checked out just to be safe.
Symptoms and signs of carbon monoxide poisoning are headaches, dizziness, blurred vision, vomiting, and nausea.
Some people who have carbon monoxide poisoning may also experience muscle pain, weakness, chest pain and an irregular heartbeat.
Always make sure your gas appliances are vented properly and working properly to avoid getting carbon monoxide poisoning and make sure your vents to gas appliances are not bent and are clear of any debris.