SKU: 9262877285

Kidde KF21R Sentry Mains Powered Optical Smoke Alarm with Sealed-In Rechargeable Lithium Battery Back-Up c/w Quick Fit Base

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Description

Kidde KF21R Sentry Mains Powered Optical Smoke Alarm with Sealed-In Rechargeable Lithium Battery Back-Up c/w Quick Fit BaseKidde KF21R Sentry Mains Powered Optical Smoke Alarm with Rechargeable Lithium Battery Back Up The Kidde KF21R Sentry Optical Smoke Alarm 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. Equipped with

Kidde KF21R Sentry Mains Powered Optical Smoke Alarm with Rechargeable Lithium Battery Back-Up

The Kidde KF21R Sentry Optical Smoke Alarm 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.

Equipped 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.

Designed for straightforward installation, the alarm features Kidde’s Quick-Fit Slide-On Base 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.

Key Features

  • Mains-powered optical smoke alarm with sealed rechargeable lithium battery back-up
  • Interconnects with up to 23 compatible Kidde FIREX alarms
  • Optical sensor technology for detecting slow, smouldering fires
  • Quick-Fit Slide-On Base for fast, tool-free installation
  • 150mm flared base plate for neat retrofitting
  • Integrated cable management for secure and tidy wiring
  • Alarm memory identifies the activated unit within the network
  • Combined Test/Hush button for easy testing and temporary silencing
  • Automatic reset after alarm activation
  • Tamper-resistant locking mechanism for added security
  • Suitable for lofts, hallways, bedrooms and living areas
  • Fully compatible with Kidde FIREX smoke, heat and CO alarms
  • 10-year manufacturer warranty

Ideal Applications

The Kidde KF21R optical smoke alarm is recommended for installation in:

  • Hallways and circulation routes
  • Bedrooms
  • Living rooms
  • Attics and loft spaces
  • Residential Grade D1 fire alarm systems

Optical smoke alarms are particularly effective at detecting slow-burning fires and are ideal for escape routes and living spaces.

Technical Specifications

  • Model: KF21R
  • Power Supply: 230V mains with sealed rechargeable lithium 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: D1
  • Approvals: BSI certified to BS EN14604:2005
  • Dimensions: 150mm x 150mm x 53mm
  • Weight: 260g including battery
  • Operating Temperature: -10°C to +40°C
  • Humidity Range: Up to 93% RH non-condensing
  • Warranty: 10 Years

Compliance & Installation

The 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.

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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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]
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SKU: 9262877285

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4.6 ★★★★★
Based on 25 reviews
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Product Reviews
M
Verified Purchase
M. Schmitz
Pawtucket, US
★★★★★ 2
Has Potential, Poorly Executed
Format: Kindle
I really really wanted to enjoy this book and was looking forward to reading it. However there were just one too many convoluted plot points, sentences just did not flow nicely at times, and I was left with a lot of confusion on my end. I think it has the bones of being a great story but seems like it was rushed and I had to push myself to finish the last of the book and was left with an unsatisfying ending. It’s definitely different from other omegaverse novels I’ve read but not for good reasons. I really think it could be great but needs some serious tweaking and editing before I’d read it again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 3, 2025
C
Verified Purchase
Carmen Alicea
Birmingham, US
★★★★★ 5
Secrets, Seduction, and Rockstars!
Format: Kindle
Rockstars, secrets, and off-the-charts chemistry? Sign me up! Cinder Blaze takes us on a rollercoaster of passion and peril with Knot Their Omega. Blair Vesper, a secret Omega masquerading as an Alpha, strikes a risky deal to tour with Blooming Salvation, a band teetering on the edge of chaos. Enter Icarus Morrigan, the enigmatic manager, and his three complicated and irresistibly sexy rockstars: wild Kenji, icy Kaiser, and fiery Nathaniel. This book delivers steamy Omegaverse drama, sizzling slow-burn romance, and just the right dash of angst. The tension between Blair and the band crackles like electricity onstage, while the societal stakes add depth to the spicy dynamics. Short, sharp, and oh-so-sinful Knot Their Omega will have you hooked from the first note!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 9, 2024
S
Verified Purchase
SR
Battle Creek, US
★★★★★ 5
Good start to a series
Format: Kindle
I delayed reading the series for reasons I don’t remember. But my TBR list is huge so I thought I’d take a shot of this and I was pleasantly surprised. I didn’t think the blurb about it was anything special. But it was a very good book. It took some interesting twists and turns. I am so glad the second book is already out. Because I would not have waited patiently. Very slow burn but good storyline. 🔥🔥/5
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 3, 2025
J
Verified Purchase
Jammie Clark
Draper, US
★★★★★ 4
A good read
Format: Kindle
Multiple points of view. 3 Alpha men and an Omega male. She is a Beta in training for a new program placing betas in Alpha/Omega packs. Mila is only doing the program for the money to take care of her dad. She wasn't expecting to fall for a pack but when she sees this packs Omega she is done for. There is just something about him. His Alphas are good looking as well. Too bad she is hiding a secret and their government is acting shady. I liked it and can't wait to see where their story goes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2023
B
Verified Purchase
Bri Hires
Phoenix, US
★★★★★ 3
Slightly repetitive but I did love some things
Format: Kindle
I love this type of story. And omegaverse is one of my all time favorite genres. But there are a few things that pulled me out of my enjoyment while I was reading. It was repetitive at times as well as struggled with telling not showing. So we didn’t always feel like we were experiencing things with the main character. There were also some plot holes but they may still be answered in part 2. Now this isn’t to be said I didn’t enjoy parts of the story. I loved the almost instant love between Mila and Oliver. And how he started changing around her.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2024

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