Test Your Home
Know your homeNo CO alarm swap to Carbon monoxide alarm
Carbon monoxide kills more than 400 Americans a year, and you can’t see, taste or smell it.

Our pick
Kidde battery CO alarm (AA), 3rd edition
We earn a commission if you buy.
Test Your Home
Know your homeCarbon monoxide kills more than 400 Americans a year, and you can’t see, taste or smell it.

Our pick
Kidde battery CO alarm (AA), 3rd edition
We earn a commission if you buy.
An alarm is your early warning for a gas you can’t sense. CDC advises battery or battery-backup alarms near every sleeping area.
Carbon monoxide is a toxic gas that can kill before you know it’s in your home. Each year it also sends more than 100,000 Americans to the ER.
General information, not medical advice. Ask your doctor, especially if you’re pregnant, nursing or have a health condition.
Check the batteries when the clocks change, and replace the alarm every 5 years or as the maker says.
Health and safety facts on this page come from these sources. What a pick is made of comes from its maker's listing or website, as stated on the date we checked.
Test Your Home
Radon is the #2 cause of lung cancer in the US, and nearly 1 in 15 homes has high levels.

Our pick
First Alert RD1 radon gas test kit, lab fee included
Test Your Home
Home built before 1978? Start free: ask your landlord or seller what they know about lead paint, and ask your child’s doctor about a blood lead test. To test the paint, mail a sample to an accredited lab.

Our pick
Schneider Labs mail-in lead test kit, paint, dust or soil, 1 sample