The cost of a carbon monoxide detector typically ranges from fifteen to fifty dollars for standard residential models available at hardware stores and online retailers. Basic plug-in digital units with backup batteries usually cost between twenty and thirty dollars, while hardwired interconnected models or advanced smart detectors featuring Wi-Fi connectivity, smartphone alerts, and voice warnings can range from forty to over one hundred dollars per device. Investing in quality detectors represents a minor expense for vital life-safety protection against silent poisoning hazards.
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