Carbon monoxide (CO) detectors are not currently required. However, we believe that carbon monoxide detectors are a good idea. Since carbon monoxide is colorless, odorless, tasteless and is known for mimicking the signs and symptoms of a person with a cold or flu, many people are exposed to CO without knowing it. Experts say at least one CO detector in a home is a good idea, especially if you live in a well-insulated home or there are young or old persons living in the home.