Carbon monoxide is known as the invisible killer because you can’t see or smell it. Install carbon monoxide alarms outside each sleeping area and on every level of your home. Test alarms monthly to make sure they’re working properly. #CarbonMonoxideSafety   #COAlarm   #SparkyTheFireDog   #NFPA   #HomeSafety   #FireSafety   #SafetyTips   #COAwareness Shared from Sparky the Fire Dog