Carbon Monoxide is a gas that is colourless, odorless and tasteless that can lead to severe illness, long term health issue and even death. This gas can permeate and circulate around your home from sources including furnaces, stoves, fireplaces, gas cooking stoves and other fuel-burning devices. Carbon Monoxide alarms exist to help detect unhealthy levels of this gas in your home, so that you can protect your family against illness, adverse health effects and potentially fatal CO levels.