{"product_id":"kidde-kf21r-sentry-mains-ac-optical-smoke-alarm-sealed-in-rechargeable-lithium-battery-back-up-with-quick-fit-base","title":"Kidde KF21R Sentry Mains Powered Optical Smoke Alarm with Sealed-In Rechargeable Lithium Battery Back-Up c\/w Quick Fit Base","description":"\u003ch1\u003eKidde KF21R Sentry Mains Powered Optical Smoke Alarm with Rechargeable Lithium Battery Back-Up\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eKidde KF21R Sentry Optical Smoke Alarm\u003c\/strong\u003e is a high-performance mains-powered smoke detector designed to provide dependable fire detection throughout residential properties. Featuring an advanced optical sensor, the KF21R is ideal for detecting slow, smouldering fires commonly caused by upholstered furniture, electrical faults and cigarettes.\u003c\/p\u003e\n\u003cp\u003eEquipped with a sealed rechargeable lithium battery back-up, this alarm continues to operate during mains power failures without the need for battery replacement. The KF21R can also be interconnected with up to 23 compatible Kidde FIREX smoke, heat and carbon monoxide alarms, ensuring all alarms sound simultaneously when danger is detected.\u003c\/p\u003e\n\u003cp\u003eDesigned for straightforward installation, the alarm features Kidde’s \u003cstrong\u003eQuick-Fit Slide-On Base\u003c\/strong\u003e for fast, tool-free fitting. The integrated cable management system helps maintain tidy wiring, while the 150mm flared base provides a neat finish during retrofit projects.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMains-powered optical smoke alarm with sealed rechargeable lithium battery back-up\u003c\/li\u003e\n\u003cli\u003eInterconnects with up to 23 compatible Kidde FIREX alarms\u003c\/li\u003e\n\u003cli\u003eOptical sensor technology for detecting slow, smouldering fires\u003c\/li\u003e\n\u003cli\u003eQuick-Fit Slide-On Base for fast, tool-free installation\u003c\/li\u003e\n\u003cli\u003e150mm flared base plate for neat retrofitting\u003c\/li\u003e\n\u003cli\u003eIntegrated cable management for secure and tidy wiring\u003c\/li\u003e\n\u003cli\u003eAlarm memory identifies the activated unit within the network\u003c\/li\u003e\n\u003cli\u003eCombined Test\/Hush button for easy testing and temporary silencing\u003c\/li\u003e\n\u003cli\u003eAutomatic reset after alarm activation\u003c\/li\u003e\n\u003cli\u003eTamper-resistant locking mechanism for added security\u003c\/li\u003e\n\u003cli\u003eSuitable for lofts, hallways, bedrooms and living areas\u003c\/li\u003e\n\u003cli\u003eFully compatible with Kidde FIREX smoke, heat and CO alarms\u003c\/li\u003e\n\u003cli\u003e10-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cp\u003eThe Kidde KF21R optical smoke alarm is recommended for installation in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHallways and circulation routes\u003c\/li\u003e\n\u003cli\u003eBedrooms\u003c\/li\u003e\n\u003cli\u003eLiving rooms\u003c\/li\u003e\n\u003cli\u003eAttics and loft spaces\u003c\/li\u003e\n\u003cli\u003eResidential Grade D1 fire alarm systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eOptical smoke alarms are particularly effective at detecting slow-burning fires and are ideal for escape routes and living spaces.\u003c\/p\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e KF21R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 230V mains with sealed rechargeable lithium battery back-up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor Type:\u003c\/strong\u003e Optical with dust compensation and bug screen\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm Volume:\u003c\/strong\u003e Minimum 85dB at 3 metres\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm Frequency:\u003c\/strong\u003e 3.2 kHz typical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterconnectivity:\u003c\/strong\u003e Up to 23 compatible alarms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlarm Grade:\u003c\/strong\u003e D1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApprovals:\u003c\/strong\u003e BSI certified to BS EN14604:2005\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 150mm x 150mm x 53mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 260g including battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -10°C to +40°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity Range:\u003c\/strong\u003e Up to 93% RH non-condensing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 10 Years\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompliance \u0026amp; Installation\u003c\/h2\u003e\n\u003cp\u003eThe Kidde KF21R complies with UK Building Regulations and BS 5839 Part 6 standards for Grade D domestic fire alarm systems. Installation should be completed by a qualified electrician. For kitchen installations, a dedicated Kidde FIREX heat alarm is recommended instead of a smoke alarm.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/h9KdZktsF9A?si=0K3hkDAtyg1YqcJD\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eDownloads\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eData Sheet:\u003c\/strong\u003e\u003cbr\u003e\u003ca href=\"https:\/\/a.mktgcdn.com\/f\/4139856\/N1qtN-KTPiGxV4FCNukEVy8KrHFuo3kFjmynmZb3DAM.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDownload Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstruction Manual:\u003c\/strong\u003e\u003cbr\u003e\u003ca href=\"https:\/\/a.mktgcdn.com\/f\/4139856\/5E_Cqq3RopAzls8aPoJmvHQMeuuRxjlrsjQeILwJrPw.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eDownload Instruction Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Kidde","offers":[{"title":"Default Title","offer_id":58118397231488,"sku":"KF21R","price":49.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2349\/2557\/files\/width_1920_height_1920_6a0c9bd0-cbd3-4dcf-aed0-450538d71388.png?v=1779200359","url":"https:\/\/westbasedirect.com\/products\/kidde-kf21r-sentry-mains-ac-optical-smoke-alarm-sealed-in-rechargeable-lithium-battery-back-up-with-quick-fit-base","provider":"westbasedirect.com","version":"1.0","type":"link"}