Kidde Sentry 3x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit Mains Powered with 9V Alkaline Battery Back-Up c/w Quick Fit Base
SKU: 55425022656

Kidde Sentry 3x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit Mains Powered with 9V Alkaline Battery Back-Up c/w Quick Fit Base

$91.19 $101.32
Save 10%
No.2 Bestseller on ultrafibras.com.mx >

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 8 - Jul 13

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Kidde Sentry 3x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit Mains Powered with 9V Alkaline Battery Back-Up c/w Quick Fit BaseKidde Sentry 3x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit with 9V Battery Back Up The Kidde Sentry Alarm Kit combines three KF21 Optical Smoke Alarms and one KF31 Heat Alarm to provide comprehensive fire detection coverage throughout residential properties. Designed for mains powered installation, each alarm features a 9V alkaline battery back up and can be interconnected with up to 23 compatible Kidde FIREX alarms for complete whole home

Kidde Sentry 3x KF21 Optical Smoke & 1x KF31 Heat Alarm Kit with 9V Battery Back-Up

The Kidde Sentry Alarm Kit combines three KF21 Optical Smoke Alarms and one KF31 Heat Alarm to provide comprehensive fire detection coverage throughout residential properties. Designed for mains-powered installation, each alarm features a 9V alkaline battery back-up and can be interconnected with up to 23 compatible Kidde FIREX alarms for complete whole-home protection.

This alarm bundle is ideal for larger homes and multi-room residential properties, offering dependable smoke detection in hallways, landings, bedrooms and living areas, alongside dedicated heat detection for kitchens, garages and loft spaces.

Each alarm is supplied with Kidde’s Quick-Fit Slide-On Base for fast and tidy installation. Integrated cable management helps maintain organised wiring, while the 150mm flared base ensures a clean finish during retrofit installations.

Kit Contents

  • 3 x Kidde KF21 Optical Smoke Alarms
  • 1 x Kidde KF31 Heat Alarm

KF21 Optical Smoke Alarm Features

The Kidde KF21 optical smoke alarm is designed to detect slow, smouldering fires commonly caused by electrical faults, upholstery or cigarettes. Ideal for escape routes and living spaces, the KF21 provides reliable early warning protection.

  • Mains-powered optical smoke alarm with 9V alkaline battery back-up
  • Optical sensor with dust compensation and bug screen
  • Interconnects with up to 23 Kidde FIREX alarms
  • Alarm memory identifies the activated alarm
  • Combined Test/Hush button
  • Auto reset after activation
  • Tamper-resistant locking mechanism
  • Suitable for hallways, bedrooms, lofts and living rooms
  • BSI certified to BS EN14604:2005
  • 10-year warranty

KF31 Heat Alarm Features

The Kidde KF31 heat alarm is designed for kitchens, garages and loft spaces where smoke alarms may be unsuitable due to steam, cooking fumes or dust. The thermistor heat sensor provides dependable heat detection while helping reduce nuisance alarms.

  • Mains-powered heat alarm with 9V alkaline battery back-up
  • Thermistor heat sensor for reliable heat detection
  • Interconnects with up to 23 Kidde FIREX alarms
  • Alarm memory identifies the activated alarm
  • Combined Test/Hush button
  • Auto reset after activation
  • Tamper-resistant locking mechanism
  • Ideal for kitchens, garages and loft spaces
  • BSI certified to BS 5446 Part 2:2003
  • 10-year warranty

Key Benefits

  • Comprehensive smoke and heat alarm solution for larger homes
  • Interlinked alarms provide whole-home warning when danger is detected
  • Quick-Fit bases for fast and simple installation
  • Integrated cable management for neat wiring
  • Suitable for compliance with UK Building Regulations
  • Grade D domestic fire alarm system solution
  • Fully compatible with Kidde FIREX smoke, heat and CO alarms

Technical Specifications

KF21 Optical Smoke Alarm

  • Model: KF21
  • Power Supply: 230V mains with 9V alkaline battery back-up
  • Sensor Type: Optical
  • Alarm Volume: 85dB minimum at 3 metres
  • Dimensions: 150mm x 53mm
  • Weight: 295g
  • Operating Temperature: -10°C to +40°C
  • Warranty: 10 Years

KF31 Heat Alarm

  • Model: KF31
  • Power Supply: 230V mains with 9V alkaline battery back-up
  • Sensor Type: Thermistor heat sensor
  • Alarm Volume: 85dB minimum at 3 metres
  • Dimensions: 150mm x 150mm x 66mm
  • Weight: 281g
  • Operating Temperature: -10°C to +40°C
  • Warranty: 10 Years

Please Note: Alarms are supplied individually within the kit. Installation should be completed by a qualified electrician.

Downloads

KF21 Data Sheet:
Download KF21 Data Sheet

KF31 Data Sheet:
Download KF31 Data Sheet

KF21 Instruction Manual:
Download KF21 Instruction Manual

KF31 Instruction Manual:
Download KF31 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:
  1. Standard Shipping : 3-10 business days
  • 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: 55425022656

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 2120 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
C
Verified Purchase
Caylee T.
Massapequa, US
★★★★★ 5
Well holy moly!
Format: Kindle
Holy moly that story definitely had me hooked! Kieran was definitely a character that I immediately adored. She has obviously had to deal with a butt load of too high expectations from her father (who is 🤬).. She has been helpless when it came to finding out her affinity with so many years of no answers & perceived failure. When Ronan, gives her a small inkling of hope that she be a Beast Tamer, she jumps into it. But again she doesn’t seem to fit. But when she runs into Gabe again, she ends up helping him & rethinking her life in Alfemir. And when the opportunity comes she decides leaving is the best option. But when Ronan demands he comes with her & then the random appearance of Bastian, she is feeling very overwhelmed. After she chooses to fall with them, they land on earth exactly where Gabe is located only to run into Steele who is a person that I was finding hard to like. After training, she eventually finds out she does have an affinity & it’s one that no longer exist & is incredibly powerful but also has a prophecy attached to it. I feel incredibly bad for her on she learns about the prophecy & Steele’s connection with it too. But that ending, with the battle scene & Niz….yeah definitely was not expecting that but hello I am all here for it too! Absolutely amazing start of a series & I for sure will be waiting for the next one to come out. Amazing job!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 26, 2024
B
Verified Purchase
BobbiJo- SpicyBookswBB
Phoenix, US
★★★★★ 5
So good!
Format: Kindle
Wings of Stars was a fantastic first book to a new series. It grabbed me in its clutches within the first chapter and kept ahold of me. This new world of M Sinclair and RL Caulder’s is all about angels and mythical creatures. It’s full of drama from all points. From Kieran’s awful home life to keeping the stars alive and everything in between. Kieran is our FMC and despite everything she keeps her spirit and defiance. Keeping to their norm, there is a group of guys for our FMC but they definitely aren’t established yet, and not fully cemented yet into being a group rather than her choosing between them. Ronan is so sweet and gives off Daddy vibes Gabe is also sweet and wants the best of everything for Kieran and will defend her against anyone Bastian is slightly unhinged but I loved him immediately Steele is a jerk… just as you find redeeming qualities, he screws up again… but yet I still want him to redeem himself. There’s another one… but if I gave his name I would be spoiling a plot twist so you will just have to find out yourself… but you’ll love him as much as I do. This is a slow burn but the little bit of spice we do get is hot, especially with the dirty talk.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2024
G
Verified Purchase
Gabby C.
Charlottesville, US
★★★★★ 5
Angels and the Fallen — Breathtaking Start
Format: Kindle
This book was EVERYTHING I expected it to be and more. Leave to R.L. Caulder and M. Sinclair to give us yet another amazing book! Kieran and her guys hooked me from the very beginning and did not let go. Found family is one of my favorite tropes and it was done so well in this book. Couple that along with an FMC trying to find her place in the world and I was practically drooling over this book. The world building, the conflict, the wyverin sidekick — it all was done so well that it felt fresh and real. Each love interest felt real and unique in their own ways. I felt connected to each one and like they were truly different people. I love that so much in a book and these two authors never miss with their love interests. Multi POV, Reverse harem, who did this to you, and a magical world highlighting the angels and the fallen. This book has everything and it does it so well. Big thank you to R.L. Caulder and M. Sinclair for the arc copy! I cannot wait for book 2!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2024
C
Verified Purchase
Chrystal
West Palm Beach, US
★★★★★ 4
A new take 🤔
Format: Kindle
I’m not going to go into what this book is about — by now you e already read the synopsis and have an idea — but I will give a couple of insights. Definitely a different take on angels and their fall; I like it. This is an interesting start to a new series - YES, this does end on a cliffhanger so be prepared for that. I’m eager for the next book (and hopefully the last in this series — sometimes the author(s) will switch it up depending on how the story flows for them) in this series. I’m hoping that a certain male character redeems himself because he’s a dick that will make the meaning of mixed signals jealous lol. You ever watch that old movie — I think it’s call Mommy Dearest? — yea, let’s switch that up to daddy. That man would make a perfect husband to mommy dearest. I recommend this book because while these authors are well known for their cliffhangers, they are also well known for putting out good stories.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2024
M
Verified Purchase
M Weidner
Chelsea, US
★★★★★ 3
Liked it
Format: Kindle
I liked the worlds and the characters. The prophesy is confusing in that I would think, since all worlds ore on a path to destruction, the angels would want their world to be saved. I am sure there is more evil that will be revealed as the series proceeds. I dislike a prolonged “poor little me” trope and the main character has moved past that, thankfully, and began to show a fierce attitude as the novel progressed. The last portion of the novel had some great action. It’s worth reading, just be patient with a slow start.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2024

recommand products

Bow AirPods Case
30.95
Decorate Your Dessert Cup Candle Party
130.47
Pink Lemonade Zippy
30.00
The Rice Water Revive Duo (Sulfate Free)
63.00
Dried Flower Bouquet Car Diffuser Workshop
30.95