SKU: 61658278347

Kidde KF21 Sentry Mains Powered Optical Smoke Alarm with 9V Alkaline Battery Back-Up c/w Quick Fit Base

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Description

Kidde KF21 Sentry Mains Powered Optical Smoke Alarm with 9V Alkaline Battery Back-Up c/w Quick Fit BaseKidde KF21 Sentry Mains Powered Optical Smoke Alarm with 9V Battery Back Up The Kidde KF21 Sentry Optical Smoke Alarm is a reliable mains powered smoke detector designed to provide early warning of slow, smouldering fires within residential properties. Featuring an advanced optical sensor, the KF21 is ideal for hallways, landings, bedrooms, living areas and loft spaces, helping to improve fire safety throughout the home. This interconnectable smoke

Kidde KF21 Sentry Mains Powered Optical Smoke Alarm with 9V Battery Back-Up

The Kidde KF21 Sentry Optical Smoke Alarm is a reliable mains-powered smoke detector designed to provide early warning of slow, smouldering fires within residential properties. Featuring an advanced optical sensor, the KF21 is ideal for hallways, landings, bedrooms, living areas and loft spaces, helping to improve fire safety throughout the home.

This interconnectable smoke alarm can be linked with up to 23 compatible Kidde FIREX smoke, heat and carbon monoxide alarms, ensuring that when one alarm detects danger, all connected alarms sound simultaneously for maximum protection.

Designed with installers in mind, the KF21 includes a Quick-Fit Slide-On Base for fast and tidy installation, while the 150mm flared base plate neatly covers marks left by larger existing alarms during retrofit projects.

Key Features

  • Mains-powered optical smoke alarm with 9V alkaline battery back-up
  • Interconnects with up to 23 compatible Kidde FIREX alarms
  • Advanced optical sensor for detecting slow, smouldering fires
  • Quick-Fit Slide-On Base for rapid installation
  • 150mm flared base plate for clean retrofitting
  • Integrated cable management for secure and tidy wiring
  • Alarm memory identifies the triggered alarm within the network
  • Combined Test/Hush button for testing and silencing nuisance alarms
  • Auto reset following alarm activation
  • Tamper-resistant locking mechanism
  • Suitable for lofts, hallways, bedrooms and living rooms
  • Fully compatible with Kidde FIREX smoke, heat and CO alarms
  • 10-year manufacturer warranty

Ideal Applications

The Kidde KF21 optical smoke alarm is suitable for installation in:

  • Hallways and circulation routes
  • Bedrooms
  • Living rooms
  • Attics and loft spaces
  • Residential properties requiring Grade D2 fire detection

Optical smoke alarms are particularly effective at detecting slow-burning fires caused by upholstery, electrical faults or cigarettes, making them ideal for living spaces and escape routes.

Technical Specifications

  • Model: KF21
  • Power Supply: 230V mains with 9V alkaline battery back-up
  • Sensor Type: Optical with dust compensation and bug screen
  • Alarm Volume: Minimum 85dB at 3 metres
  • Alarm Frequency: 3.2 kHz typical
  • Interconnectivity: Up to 23 compatible alarms
  • Alarm Grade: D2
  • Approvals: BSI certified to BS EN14604:2005
  • Dimensions: 150mm x 53mm
  • Weight: 295g including battery
  • Operating Temperature: -10°C to +40°C
  • Humidity Range: Up to 93% RH non-condensing
  • Warranty: 10 Years

Compliance & Installation

The Kidde KF21 complies with UK Building Regulations and BS 5839 Part 6 requirements for Grade D domestic fire alarm systems. Installation should be carried out by a qualified electrician. For kitchen installations, a dedicated Kidde FIREX heat alarm is recommended instead of a smoke alarm.

Downloads

Data Sheet:
Download Data Sheet

Instruction Manual:
Download Instruction Manual

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 61658278347

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4.7 ★★★★★
Based on 7 reviews
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Product Reviews
L
Verified Purchase
LaChante Anderson
Phoenix, US
★★★★★ 5
Good plot but definitely slow burn
Format: Kindle
⭐️⭐️⭐️⭐️.5|🌶️🌶️🌶️🌶️ (not a ton of spice scenes for an Omegaverse) The plot, character development, scene progression, and action throughout the story was done really well. I did wish there was better pacing for the spice. I felt like the big spice was really rushed. During some scenes the story was a little hard to follow. I think some parts could’ve been cut. Overall I would read more from this author! 💖
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2025
A
Verified Purchase
Amazon Customer
Louisville, US
★★★★★ 5
omg loved the story
Format: Kindle
I’ve been in a reading slump DNFing so many books and finally found a story to keep me captivated… now with that though there were still some parts that were a bit of a struggle like Tatums struggle with the past trauma she dragged that on for ever I get it pasts are hard to overcome sometimes. But honestly it was easy to get over it falling in love with all these little psychos 🤣🤣🤣 absolutely loved Kodi’s obsession with getting Easton even though he doesn’t know him but smells brownies everywhere and missing the mark it was hysterical.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2025
L
Verified Purchase
Lisa Maddison
Massapequa, US
★★★★★ 4
Omegaverse with rival families.
Format: Kindle
Tatum is trying to raise enough money to treat her omega mother who has fallen catatonic due to the death of her mate. To make the money she needs she agrees to work at a gentleman's club scantily dressed. There she meets the twin Hayes brothers, Declan and Kodiak, what she doesn't know is that their younger half brother is the high school sweetheart that ghosted her after helping with her first heat. Tatum also meets Easton, the mysterious male omega that pops into her life but she finds herself strongly attracted to. I enjoyed all the characters, even those that were not major characters, the plot was good, the storyline was well done. I would recommend this book if you liked Omegaverse stories, mafia storylines, and good romance with why choose.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2025
T
Verified Purchase
T_Mich13
Chelsea, US
★★★★★ 5
Loved it!
Format: Kindle
Who doesn’t love morally grey men obsessed with their omega who isn’t afraid to call them out on their unacceptable behavior and make them grovel? Tatum really is a survivor through and through. She is willing to do anything to get her mother the help she needs, even deal with the man her broke her heart. If you love brothers playing jokes, crazy stabby omegas and rich men being told no, you will enjoy this book. Great spice and great ending.
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Reviewed in the United States on March 5, 2025
S
Verified Purchase
Sycokittykat - Steff
Lowell, US
★★★★★ 4
Omega survival mode
Format: Kindle
Tatum is an Omega who has been suppressing herself since she had a heartbreaking fallout after her first heat. The boy she loved ghosted her after it was over.  Tatum lost her father when she was just 8 and her mother struggled to survive until Tatum got to be an adult and was unable to keep pushing. So now Tatum is being the parent and she needs a better paying job so she can afford to put her mother in a care facility until she is better. When she finds a job posting for Haze Instincts she knows they take care of their Omega staff and if she is a dancer or maybe something more she will be able to catch up on bills and get her mom taken care of.  As she is exposed to a few different irresistible Alphas she is forced to remember who she is and face everything she has been running from. Will she be able to accept all of her Omega nature, get her mother the care she needs, form a pack and let go of the past? This book was sad and sweet too. Tatum has been through so much and she doesn't know how everything fits together. As the pieces fit into the puzzle she has to choose a future even if it is scary.  I love the ladies she works with at the club. Their personalities are so fun. Also, I love a groveling Alpha. Though Mr. Brownies was a fun twist. I love that the story was comprehensive and filled in all of the missing pieces in a way that was engaging and made sense.  That epilogue was so freaking sweet and an absolutely perfect ending.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 24, 2025

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