Updated: Apr 15, 2021
When it comes to safety in your home, few things are as important as a CO detector. CO (carbon monoxide) is a colorless, odorless substance that causes death if not alerted to it in time. So the question is not "should I have a CO detector", but "how many CO detectors should I have?"
When it comes to CO detectors in your home, more is better. In reality, you really can’t have too many. Different manufacturers have different recommendations as to where they should be placed, but here are a few general rules.
First, remember that CO and air are approximately the same weight. So CO neither sinks nor rises on its own. Instead, the CO is moved with the normal stack affect in your home. So stairwells (especially from the basement) are good areas to put them.
Also, think about where carbon monoxide comes from. Heating units, water heaters, fireplaces, etc. Placing a detector near these items is a good idea (usually within about 10-15 ft).
And finally, think about where CO is the most dangerous – where you sleep. So placing one in each bedroom is an important step as well.
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