Carbon monoxide is a silent killer you don't want in your home but because it is colorless and odorless; you may not even be aware the deadly condition exists. The Center for Disease Control says more than 400 people in the U.S. die annually from carbon monoxide poisoning and over 10,000 require medical treatment each year.

Unmaintained furnaces, water heaters and appliances can produce the deadly gas. In addition, other sources could be leaking chimneys, unvented kerosene or gas space heaters or exhaust from cars or trucks operating in an attached garage.

The Environmental Protection Agency suggests the following to reduce exposure in the home:

* Keep gas appliances properly adjusted
* Install and use an exhaust fan vented to the outdoors over gas stoves
* Open flues when fireplaces are in use
* Do not idle car inside garage
* ave a trained professional inspect, clean and tune-up central heating systems annually

Headaches, nausea, vomiting, dizziness and feelings of weakness or fatigue are a few of the most common symptoms. Lower levels of exposure to carbon monoxide may be mistaken for the flu.

Carbon monoxide alarms should be on every level of a home and especially, in sleeping areas. The alarms can be purchased for as little as $25 and plugged into the wall like a night light.

Regardless of the government requirements, no one would want to put their family, guests or themselves at risk for something so deadly.