15 of 18 people found the following review helpful
Carbon Monoxide Alarm,
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This review is from: First Alert CO600 Plug In Carbon Monoxide Alarm , 120V Ac (Tools & Home Improvement)
I feel that these are a necessity especially if you live in colder winter climates where you may have the windows closed for a few months.
I prefer this model as it plugs in to an outlet rather than battery operated units.
I found the models through Amazaon were several dollars cheaper than stores around my area.