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rnln..you in the bay area? i have a hand held air monitor..i like you stared at my CO alarms and wondered if they are doing anything. i brought in one of our monitors and checked out my heater. all was good.
Vinman..5 years? check. i looked mine doesnt have a date on it..i should sharpie an expiration date on it or something.
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poof! gone
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