Carbon Monoxide monitors are readily available at most hardware stores, and the price has dropped considerably in the past decade or so. I think I paid $30.00 for the one I purchased for my house back around 2010; they’re now around $12.00 or so. It’s an inexpensive, but critical investment in your family’s safety.
If you have a subscription to Consumer Reports, you can get information on recommended CO monitors.
Maine Emergency Management Agency
Carbon monoxide (CO) is a deadly gas that is difficult to detect because it is odorless and invisible, but it kills nearly 300 people in their homes each year.
CO is produced by fuel-burning appliances and equipment in our homes. If you have heating, cooking or power equipment that uses fuels such as oil, natural gas, coal, wood, propane, gasoline, etc., then you need to guard against CO poisoning.
Homes with attached garages are also at risk, because vehicles or equipment such as generators left running in the garage can cause CO to seep into the home. Use all household equipment properly to prevent carbon monoxide poisoning. Install CO detectors to provide early detection of a problem.