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Which smoke detectors did you install or did you install a dual alarm?

Replaced the majority of my alarms with hardwired ionizing-CO combo units. Two areas that for whatever reason, had recurrent false alarms, I replaced with photoelectric without issues. ALL are 10-year lithium batteries so no annual BS needed.

Interesting, the photoelectric, likely since they require a disruption of a beam, have spider protection. That's what triggered my old detector (in one problem area) and prompted my replacement since I found them all to be 12 years old.

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