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Kidde Firex Plug-in Carbon Monoxide, Propane, Natural and Explosive Gas Detector, 9-Volt Battery Backup & Digital Display 21029623 - The Home Depot
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FIRST ALERT Carbon Monoxide Detector, No Outlet Required, Battery Operated, CO400, White, 2 Count (Pack of 1)
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Kidde 10 Year Worry-Free Sealed-In Lithium Battery Carbon Monoxide Detector 21029714 - The Home Depot
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Carbon Monoxide Alarms and Detectors: Buying and Installing in Your Home | Building Performance Institute, Inc.
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