{"product_id":"resideo-co400b-carbon-monoxide-alarm-battery-operated","title":"Resideo co400b Carbon Monoxide Alarm Battery Operated","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe RESIDEO co400b is a battery-operated carbon monoxide alarm designed for residential installation by licensed electricians, HVAC technicians, or qualified contractors. It uses an electrochemical CO sensor, which delivers greater accuracy than semiconductor or biomimetic sensing technologies. The unit runs on a single 9V alkaline battery included in the package and features a one-button test and silence function. Two distinct silence modes allow the installer or occupant to suppress a low-battery chirp for up to eight hours or temporarily clear a nuisance alarm without disabling the sensor. An end-of-life signal provides audible notification when the unit requires replacement.\u003c\/p\u003e\n\u003cp\u003eThe co400b is suited for residential settings including single-family homes, apartments, and light commercial occupancies where local or state codes mandate carbon monoxide detection. It mounts to a wall or ceiling surface and is intended for areas near sleeping quarters, mechanical rooms, or attached garages per typical code guidance. The unit meets requirements for jurisdictions adopting carbon monoxide alarm mandates under state and local codes and is listed to the UL 2034 standard.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eElectrochemical CO sensor for accurate detection compared to other sensing technologies\u003c\/li\u003e\n  \u003cli\u003eSingle-button test and silence operation\u003c\/li\u003e\n  \u003cli\u003eLow-battery chirp silence for up to eight hours\u003c\/li\u003e\n  \u003cli\u003eTemporary nuisance alarm silence without disabling detection\u003c\/li\u003e\n  \u003cli\u003eEnd-of-life audible warning signals when unit needs replacement\u003c\/li\u003e\n  \u003cli\u003eEasy-access battery compartment with replaceable 9V alkaline battery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standalone battery-operated carbon monoxide alarm suitable for residential and light commercial installations requiring compliance with UL 2034 and applicable state or local CO alarm codes.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed in accordance with the manufacturer instructions and applicable local codes, including NFPA 720 guidelines for CO alarm placement. Power down is not required for this battery-operated unit, but verify the 9V battery is fully seated before mounting. Mount the alarm to a wall or ceiling in the location specified by local code, typically near sleeping areas or fuel-burning appliances. Do not install in areas subject to extreme temperatures, high humidity, or direct airflow from vents, which can affect sensor accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSensor Type\u003c\/strong\u003e: Electrochemical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Source\u003c\/strong\u003e: Battery Operated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Size\u003c\/strong\u003e: 9V alkaline\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Batteries\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Replaceable\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound Level\u003c\/strong\u003e: 85 dB at 10 feet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Height\u003c\/strong\u003e: 3.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Length\u003c\/strong\u003e: 4.9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Width\u003c\/strong\u003e: 1.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Weight\u003c\/strong\u003e: 0.45 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApprovals and Standards\u003c\/strong\u003e: Listed to UL 2034\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: 7 Years Limited\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: RESIDEO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: co400b\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RESIDEO","offers":[{"title":"Default Title","offer_id":51138245165362,"sku":"CO400B","price":36.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305532941.jpg?v=1778251498","url":"https:\/\/voomisupply.com\/products\/resideo-co400b-carbon-monoxide-alarm-battery-operated","provider":"Voomi Supply","version":"1.0","type":"link"}