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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
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.5 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
What a find!
Color: PDRN 25%
Good stuff! My skin healed ULTRA fast with this!! I can really tell it is good stuff! Plus, it has that “bio” smell that means it’s real.
The formula is a little oily as opposed to watery. Just FYI I think serum slightly thicker is better.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
★★★★★ 5
Oopsy Daisy, bad for not reading directions!
Color: PDRN 25%
Oops 😬, I forgot to mix this PDRN serum with my hyaluronic serum before applying on my skin. Instead I have been applying it directly on my face 2x daily. I have noticed major improvement on my skin. My skin is dewy, bright, and flawless. Fortunately, I did not experience any skin reactions the undiluted product. I will come back and stock up on these bottles to mix with hyaluronic serum for microneedling.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 26, 2025
★★★★★ 4
The Skin Regenerator Your Routine Is Missing
Color: PDRN 25%
If you've been dealing with dull, dehydrated skin or feel like your usual creams just aren't cutting it anymore, the Salmon DNA PDRN 250,000 ppm Concentrate might be the missing piece. I started using this booster three months ago, and it has genuinely transformed the texture and bounce of my skin.
What problem does this solve?
As we age or expose our skin to environmental stress, our natural cell regeneration slows down, leading to dullness, loss of firmness, fine lines, and a damaged moisture barrier. This PDRN concentrate essentially acts as a cellular "wake-up call." Salmon DNA shares a remarkably high biocompatibility with human skin, helping to repair DNA damage, reignite collagen production, and speed up the skin's natural healing process.
Features & Benefits
· Regenerative Power: Packed with 25% (250,000 ppm) PDRN (Polydeoxyribonucleotide) to repair and rejuvenate.
· Wrinkle & Texture Refinement: Helps improve elasticity and reduce fine lines for smoother, more resilient skin.
· Hydration & Barrier Support: Formulated with Sodium DNA and Panthenol to deeply replenish moisture and soothe sensitivity.
· Booster Format: A versatile concentrate you mix with your moisturizer or serum to amplify your entire routine.
· Enhanced Complex: Includes EGF (Epidermal Growth Factor) and Peptides for added collagen support.
Pros
· ✅ High concentration of active ingredients for noticeable results.
· ✅ Excellent for post-procedure skin (non-irritating after microneedling).
· ✅ Improves overall skin health, not just surface appearance.
· ✅ Suitable for all skin types looking for anti-aging or hydration.
Cons
· ❌ Texture can be sticky – it leaves a slight residue on your fingers and face that takes a few minutes to absorb.
· ❌ Requires consistency – results are not instantaneous and need regular use to build.
· ❌ The concept of "salmon DNA" might feel unusual to some, though it's highly effective and dermatologist-backed.
Final Verdict
This isn't a quick-fix product, but if you stick with it, the reward is skin that looks plumper, healthier, and more resilient. It’s like sending your skin into a repair shop. Best for anyone who has hit a plateau with their current anti-aging routine or who wants to actively strengthen their skin's foundation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
★★★★★ 5
Good
Color: PDRN 25%
Works well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 3
It's okay.
Color: PDRN 25%
I'm not going to say it's good I'm not going to say it's bad, I do not like the sticky feeling you have to wash your hands afterwards. And it feels sticky on your face for a while I used it about 10 minutes after microneedling my face. It did help my face feel better kind of calm it down a little bit. When I applied it it didn't burn or nothing
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026