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Description
Kidde Firex 3x KF20R Optical Smoke & 1x KF30R Heat Alarm Kit Mains Powered with Sealed-In Rechargeable Battery Back-UpKidde Firex 3x KF20R Optical Smoke & 1x KF30R Heat Alarm Kit Mains Powered with Sealed In Rechargeable Battery Back Up FULLY COMPLY WITH THE NEW 2022 SCOTTISH & WELSH REGULATIONS 3x Mains Powered Optical Smoke Alarm (KF20R): Mains Optical Smoke Alarm Features: Mains powered optical smoke alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat. Once interlinked, the detection of the relevant danger by
Kidde Firex 3x KF20R Optical Smoke & 1x KF30R Heat Alarm Kit Mains Powered with Sealed-In Rechargeable Battery Back-Up
FULLY COMPLY WITH THE NEW 2022 SCOTTISH & WELSH REGULATIONS
3x Mains Powered Optical Smoke Alarm (KF20R):
Mains Optical Smoke Alarm Features:
Mains-powered optical smoke alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat.
Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.
Optical alarms are for use in escape or circulation routes and in areas where there is a danger of ignition of furniture and surroundings by cigarettes producing slow, smouldering fires.
This mains-powered unit should be installed by a qualified electrician and can be used throughout the home, except in the kitchen where a Firex Heat Alarm is recommended. These alarms comply with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).
- Interlink with up to 23 Firex hard-wired alarms – all alarms sound if danger is detected
- Alarm memory – identifies source unit within interconnecting network
- Combined Test/Hush button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
- Auto reset after activation
- Tamper-resistant locking device – prevents unauthorised removal without the use of a tool
- Mains operation – Built-in rechargeable Lithium back-up tamper-proof battery
Mains Optical Smoke Alarm Specification:
- Model KF20R
- Power Supply 230V mains-powered with built in rechargeable lithium battery back up
- Temperature Range 0ºC to + 40ºC
- Humidity Range Up to 93% Relative Humidity (RH) non-condensing
- Storage and Transport -20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
- Alarm Dimensions 127 x 127 x 39mm
- Bracket Dimensions 133 x 133 x 6mm
- Alarm Weight 242g
- Warranty 6 years
- Approvals BSI certified to BS EN14604:2005
- CE tested and certified Sensor Optical, circular lateral chamber with insect-resistant width slot entry portals and added bug screen mesh
- Chamber Size 35mm outside diameter x 16mm depth approximate (external)
- Detection Band Infrared light wavelength
- Button Test Simulates the effect of smoke within the sensing chamber, checks electronics and sounder
- Automatic Self-test Circuitry is tested and unit beeps (chirps) if fault is detected
- Supply Voltage 230V AC, 50 Hz (nominal UK voltage)
- Power Consumption < 15mA
- Connection Push-in/snap-fit type connector with 150mm long flying leads (supplied)
- Battery Back-up User-replaceable alkaline 9V battery (522/6LR61)
- Power-on Indicator Continuous green LED
- Alarm Sounder Electronic piezo-electric sounder (T3 pattern sound - 3 pulses - space - 3 pulses), soldered contacts
- Sound Output 85dB (A) minimum at 3 metres
- Alarm Frequency 3.2 kHz typical
- Dust Protection In-built foam gasket in rear of alarm to prevent dust ingress into rear of the alarm
- Alarm Status Red LED flashes approx once every five minutes = normal operation
- Red LED flashes once a second = sensing smoke (sounder alarm sounds)
- Red LED flashes once every ten seconds = in hush condition (auto-reset after 15 minutes)
- Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected with optional control (see below)
- Optional Controls Wired Remote Test and Hush Unit (REMTH) allows test and hush of interlinked units
- Optional Pattresses SMK23RU also has integral switchable relay for operating remote devices
- SMK4896 – Surface mounting base for added ease of installation
- Fixing Mounting bracket ring supplied with two ‘T’ slot fitting option
- 57mm spacing to a maximum of 90mm for standard screw fittings on back boxes
- Bracket has 50mm diameter central access hole for cabling
- Plastics used NORYL – Cover, main body and mounting bracket
- Lead-Free Status All Firex alarms are lead-free
1x Mains Powered Heat Alarm (KF30R):
Mains Heat Alarm Features:
Mains-powered heat alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat.
Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.
Mains-powered heat alarms can be used throughout the home in humid or dusty environments where an optical or ionisation smoke alarm is unsuitable, e.g. kitchens, loft spaces and garages.
The Firex range requires installation by a professionally qualified electrician and complies with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).
- Interlink with up to 23 Firex hard-wired alarms – all alarms sound if danger is detected
- Alarm memory – identifies source unit within interconnecting network
- Combined Test/Hush button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
- Auto reset after activation
- Tamper-resistant locking device – prevents unauthorised removal without the use of a tool
- Mains operation – Built-in rechargeable Lithium back-up tamper-proof battery
Mains Heat Alarm Specification:
- Model KF30R
- Power Supply 230V mains-powered with rechargeable Lithium battery back-up
- Temperature Range 0ºC to + 40ºC
- Humidity Range Up to 93% Relative Humidity (RH) non-condensing
- Storage and Transport -20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
- Alarm Dimensions 127 x 127 x 39mm (not including heat sensor guard)
- Bracket Dimensions 133 x 133 x 6mm
- Alarm Weight 180g
- Warranty 6 years (including battery)
- Approvals BSI certified to BS5446 Part 2: 2003
- CE tested and certified
- Sensor Thermistor (Thermal Resistor) within detection unit
- Button Test Simulates the effect of heat at the sensor, checks electronics and sounder
- Automatic Self-test Circuitry is tested and unit beeps (chirps) if fault is detected
- Supply Voltage 230V AC, 50 Hz (nominal UK voltage)
- Power Consumption < 15mA
- Connection Push-in/snap-fit type connector with 150mm long flying leads (supplied)
- Battery Back-up Non user-replaceable 3 x 3V rechargeable Lithium Aluminium Alloy / Magnesium Composite
- Oxide cells (ML2430)
- Power-on Indicator Continuous green LED
- Alarm Sounder Electronic piezo-electric sounder (T3 pattern sound - three pulses - space - three pulses) with soldered contacts
- Sound Output 85dB (A) minimum at 3 metres
- Alarm Frequency 3.2 kHz typical
- Alarm Status Red LED flashes approx once every five minutes = normal operation
- Red LED flashes once a second = sensing heat in excess of 58ºC (sounder alarm sounds)
- Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected with optional control (see below)
- Optional Controls Wired Remote Test and Hush Unit (REMTH) allows test and hush of interlinked units
- Optional Pattresses SMK23RU also has integral switchable relay for operating remote devices
- SMK4896 – Surface mounting base for added ease of installation
- Fixing Mounting bracket ring supplied with two ‘T’ slot fitting option
- 57mm spacing to a maximum of 90mm for standard screw fittings on back boxes
- Bracket has 50mm diameter central access hole for cabling
- Plastics used NORYL – Cover, main body and mounting bracket
- Lead-Free Status All Firex alarms are lead-free
Please note: Alarms are sold individually.
Data Sheet:
Data Sheet for KF20RData Sheet for KF30R
Instruction Manual:
Instruction Manual for KF20RInstruction Manual for KF30R
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4.7 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
5 Star
Format: Hardcover
Rachel is a very fine writer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
★★★★★ 5
Informative
Format: Hardcover
Good read
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Reviewed in the United States on March 28, 2026
★★★★★ 5
If we care about racism and white privilege, what should we do?
Format: Kindle
One hundred and fifty-two years ago, slavery ended in the United States. And yet the tentacles of that time touch lives every day, all these years later.
What can be done to make things better? Michael Eric Dyson, a sociology professor at Georgetown University, and an ordained Baptist minister, suggests that white people who care about the lives of black people should make individual reparations. In his book, Tears We Cannot Stop …A Sermon to White America, Dyson says, “{Black people} built a legacy of excellence and struggle and pride amidst one of the most vicious assaults on humanity in recorded history. That assault may have started with slavery, but it didn’t end there. The legacy of that assault, its lingering and lethal effect, continues to this day. It flares in broken homes and blighted communities, in low wages and social chaos, in self-destruction and self-hate too. But so much of what ails us—black people. That is—is tied up with what ails you—white folk, that is. We are tied together in what Martin Luther King Jr. called a single garment of destiny. Yet sewed into that garment are pockets of misery and suffering that seem to be filled with a disproportionate number of black people.”
The book, unlike Dyson’s other scholarly works, takes the form of a worship service, and uses the concept of an extended sermon, or jeremiad, to lead the reader through confession, repentence, and redemption “through the long night of despair to the bright day of hope.” In Dysons’s view, “whiteness is a problem to be struggled with,” and his book is of inestimable value in grappling with the struggle.
The book speaks at length of police brutality against black people, and fervently tries to create empathy in white readers. It includes an extraordinary bibliography of books which give insight and voice to black history, oppression, pain, achievement, and lives.
And it speaks of reparations, and our responsibility as white beneficiaries of an unequal system, to take concrete actions to right the wrong, the change our country and the lives of our black sisters and brothers and their children.
Dyson is imaginative, and has many suggestions for how an individual or group “I.R.A.”—an Individual Reparations Account. We could buy books for black college students, overpay our black accountant or hairdresser, pay the black person who cuts our grass double the amount on the bill, give to the United Negro College Fund, and more. He suggests that faith groups consider giving 10% of their revenues to a church I.R.A. In an interview in the New York Times Magazine, Dyson says, “If the sermon ain’t making you a little bit uncomfortable, it ain’t effective. Look, if it doesn’t cost you anything, you’re not really engaging in change: you’re engaging in convenience. I’m asking you to do stuff you wouldn’t ordinarily do. I’m asking you to think more seriously and strategically about why you possess and what you possess…..you ain’t got to ask the government, you don’t have to ask your local politician—this is what you, an individual, conscientious, ‘woke’ citizen can do.
I have read many—though surely not all—of the books Dyson recommends. I have grappled with white privilege as a mother of black children, a fighter against apartheid, a civil rights activist, a human being. I have never read anything which more cogently offers “woke whites” a path to being a part of the change. I urge you to read Tears We Cannot Stop …A Sermon to White America, and to take your place in the pantheon of people who help this country grow beyond its racist past.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2017
★★★★★ 5
Powerful and especially so read aloud by the author.
Format: Audio CD
Hearing this powerful book read by Dr Tyson made it doubly understandable and enlightening. I needed to hear the experience, hurt and anger expressed so incredibly honestly and with the power of his emotion. I saw the CDs here at a reasonable price and I am so much more aware hearing rather than reading this book. Dr Tyson teaches powerful historic and current systemic racial experience such as every white person will do well to encounter. If you want to learn more than you already know, listen to these CDs on Black experience from Dr Tyson. Could be disturbing to anyone who does not want to learn the truth he teaches. It’s so packed with truth I will listen to it more than once more. Thank you, Dr Tyson.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 3, 2025
★★★★★ 5
brilliant, painful
Format: Hardcover
Timely, provocative, brilliant, painful, and, ultimately, a very necessary step toward authentic national healing and transformation. As a white, long-time fellow traveler, I am so grateful that Dr. Dyson has answered his calling to lead us toward redemptive justice with truth, decency and love--albeit, at times, necessary tough love. I am in my third read already and learning more and more each time.
Dyson's sermon serves as an exceptional read for believer and non-believer alike as it offers a framework and lexicon for us to engage with one another as we work our way through ongoing racially turbulent and polarized times. I am not a critic by trade so I will leave the professional analysis to the experts. I am a K-12 educator and seeker of social justice. I found this work both accessible and challenging in the best of ways. In my daily work, the evidence of the invention of whiteness, white innocence and white fragility and their pernicious impacts are ubiquitously abundant such that Dyson’s claims simply cannot be denied.
Dyson’s sermon is not always a comfortable read. That’s the point. It is a workout for the soul and psyche that results in the growing pains necessary for personal and collective liberation.
Thank you, Rev. Dr. Michael Eric Dyson, for opening your head and heart so broadly and deeply there is room enough for all of us in this racial healing process. The writing of this book is the ultimate act of truth and forgiveness. You have entrusted us with your most profound insights, personal experiences, and extend a vulnerability that humbles and arrests me. As you shared in a recent interview, "your trust in us grows out of forgiveness and the demand for truth for which is stands on, and the love it seeks to extend". Amen! I am in!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 30, 2017