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I wondered about getting CO detectors.

I already had a smoke detector upstairs and another one downstairs. These are combined ionization and photoelectric models.There is no gas or oil burning equipment inside my house. Once the downstairs smoke detector went off when my oil burner in the garage did not operate properly. It took no smoke detector to realize there was a problem. Squirrels had made a 4 foot plug in the chimney over the summer. Fortunately, I never had a fire.

When I replaced that oil burner with a gas mod|con, I did add a CO detector downstairs, and a little later, I put one upstairs as well. I am not sure I really need them because if the venting leaks, the CO and stuff will get loose in the garage which has enough venting to meet the code for a boiler that gets its makeup air from the garage, so I suppose the CO will go out those vents.

But reading all these CO problems lately, CO detectors are cheap compared to the alternatives.
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