Carbon monoxide (CO) gas has caused more accidental deaths than any other poison – not just because it’s fast-acting, but because you can’t see, smell or taste it, and it’s non-irritant.
Make sure you know how to use fuel-burning appliances correctly, with good ventilation, and get them professionally inspected every year.
Don’t use non-vented appliances indoors, or in semi-enclosed spaces. A non-vented appliance is one that does not have vents to carry smoke and toxic gases outside a building.
Don’t let your car engine idle in the garage unless the garage door is open and doors leading to the house are closed. (Actuallly, avoid idling your engine anywhere.)
Finally, consider installing a CO detector.
Carbon monoxide kills in minutes