Not good enough for basement rooms
I bought this detector based on a rating in Consumer Reports. However, I learned later from my plumber that many detectors don't work well enough to be used for areas close to CO2 sources. This one will not emit an alarm until it reaches 150 parts per million. My son sleeps in a room in the basement about 12 feet from the furnace and hot water heater. So the plumber installed an alarm that begins to sound at 9 parts per million. It cost around $200 installed.
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