Best Mains Fire Smoke Detector of 2026

Last updated on 08/03/2026

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Kidde Firex KF Series Mains Powered Fire Alarms Kit (3 Smoke & 1 Heat) with Alkaline Back-up Battery

Kidde

Why we love it

Ideal for home installation.
Reliable mains power support.
Includes a 6-year warranty.

Main Highlights

Ideal for installation throughout the home. Smoke alarm: Living rooms, bedrooms, hallways, landings, near (but not in) the kitchen. Heat Alarm: Kitchens, garages, unconverted loft spaces
Power: 230V mains powered with alkaline back-up battery
Back-up Battery: 9V alkaline battery (included)
Warranty: 6 year manufacturer's warranty
CE marked and Kitemarked. Smoke Alarm: certified to BS EN 14604: 2005. Heat Alarm: certified to BS 5446-2. Suitable for installations complying to BS 5829-6 2019 Grade D2
Smoke Alarm (H x D): 39 x 133mm. Heat Alarm (H x D) = 38 x 138mm

Kidde Firex KF Series Mains Powered Fire Alarms Kit (3 Smoke & 1 Heat) with Alkaline Back-up Battery

Why we love it

Ideal for home installation.
Reliable mains power support.
Includes a 6-year warranty.

Main Highlights

Ideal for installation throughout the home. Smoke alarm: Living rooms, bedrooms, hallways, landings, near (but not in) the kitchen. Heat Alarm: Kitchens, garages, unconverted loft spaces
Power: 230V mains powered with alkaline back-up battery
Back-up Battery: 9V alkaline battery (included)
Warranty: 6 year manufacturer's warranty
CE marked and Kitemarked. Smoke Alarm: certified to BS EN 14604: 2005. Heat Alarm: certified to BS 5446-2. Suitable for installations complying to BS 5829-6 2019 Grade D2
Smoke Alarm (H x D): 39 x 133mm. Heat Alarm (H x D) = 38 x 138mm

Value for Money

Kidde Firex KF Series Mains Powered Fire Alarms Kit (2 Smoke & 1 Heat) with Alkaline Back-up Battery

Kidde

Why we love it

Ideal for home-wide installation.
Includes backup battery feature.
Comes with manufacturer warranty.

Main Highlights

Ideal for installation throughout the home. Smoke alarm: Living rooms, bedrooms, hallways, landings, near (but not in) the kitchen. Heat Alarm: Kitchens, garages, unconverted loft spaces
Power: 230V mains powered with alkaline back-up battery
Back-up Battery: 9V alkaline battery (included)
Warranty: 6 year manufacturer's warranty
CE marked and Kitemarked. Smoke Alarm: certified to BS EN 14604: 2005. Heat Alarm: certified to BS 5446-2. Suitable for installations complying to BS 5829-6 2019 Grade D2
Smoke Alarm (H x D): 39 x 133mm. Heat Alarm (H x D) = 38 x 138mm

Kidde Firex KF Series Mains Powered Fire Alarms Kit (2 Smoke & 1 Heat) with Alkaline Back-up Battery

Why we love it

Ideal for home-wide installation.
Includes backup battery feature.
Comes with manufacturer warranty.

Main Highlights

Ideal for installation throughout the home. Smoke alarm: Living rooms, bedrooms, hallways, landings, near (but not in) the kitchen. Heat Alarm: Kitchens, garages, unconverted loft spaces
Power: 230V mains powered with alkaline back-up battery
Back-up Battery: 9V alkaline battery (included)
Warranty: 6 year manufacturer's warranty
CE marked and Kitemarked. Smoke Alarm: certified to BS EN 14604: 2005. Heat Alarm: certified to BS 5446-2. Suitable for installations complying to BS 5829-6 2019 Grade D2
Smoke Alarm (H x D): 39 x 133mm. Heat Alarm (H x D) = 38 x 138mm

HiSPEC Mains Powered Smoke Alarms Heat Detectors and CO Detectors Fire Safety Kits with 9V Back Up Battery: Interconnectable & Fully Compliant to Welsh 2022 Legislation (4 Smoke / 1 Heat)

HiSPEC Mains Powered Smoke Alarms Heat Detectors and CO Detectors Fire Safety Kits with 9V Back Up Battery: Interconnectable & Fully Compliant to Welsh 2022 Legislation (4 Smoke / 1 Heat)

Hispec Electrical Products Limited

Main Highlights

Peace of mind fire safety for your family and pets with mains smoke alarms, heat and carbon monoxide detectors with 9V back up battery

9.5

Superb

9.5

Superb

Hispec Electrical Products Limited

HiSPEC Mains Powered Smoke Alarms Heat Detectors and CO Detectors Fire Safety Kits with 9V Back Up Battery: Interconnectable & Fully Compliant to Welsh 2022 Legislation (4 Smoke / 1 Heat)

Main Highlights

Peace of mind fire safety for your family and pets with mains smoke alarms, heat and carbon monoxide detectors with 9V back up battery

SAFE TECH Mains-powered Radio Interlink Smoke Alarm, D1 Rating Dual Interlink Hardwired Smoke Alarm With 10 Years Backup Battery, Electrician Approved Interlinked Wired Fire Alarm BS EN 14604:2005

SAFE TECH Mains-powered Radio Interlink Smoke Alarm, D1 Rating Dual Interlink Hardwired Smoke Alarm With 10 Years Backup Battery, Electrician Approved Interlinked Wired Fire Alarm BS EN 14604:2005

SAFE TECH

Why we love it

Wired and wireless options available.
Ten years of reliable backup.
High-quality safety assurance guaranteed.

Main Highlights

【Wired or Wireless Connection 】This mains smoke alarm can be hardwired or wirelessly connected to up to 50, so when one alarm is triggered, they all sound and notify everyone of the emergency
【Hardwired and 10 Years Tamperproof Backup Battery Installed】The wired smoke alarm mains powered can be connected for use in addition to the 10 years tamperproof battery backup. When the power goes out in your house, the detector will still keep you safe
【High Quality Assurance】The mains powered smoke alarms have a 10-year sensor life and a reliable, high-performance chip to provide you with powerful protection. Products meet BS EN 14604:2005 standards, compliant with england, scotland and Wales Legislation to ensure peace of mind
【Customizable Wireless Network】This alarm can be interlinked with our interlinked range. You can create various grouped networks to meet your needs and interconnect alarms with the SAFE-TECH AJ Series, so that when one alarm is triggered, all of them go off, fully protecting your home and family
【Silence Mode】Worried about false positives? The smoke detector has a silence button, you can hold it down to calm it
Compatible with interlinked alarms and 7.0” panel

SAFE TECH Mains-powered Radio Interlink Smoke Alarm, D1 Rating Dual Interlink Hardwired Smoke Alarm With 10 Years Backup Battery, Electrician Approved Interlinked Wired Fire Alarm BS EN 14604:2005

Why we love it

Wired and wireless options available.
Ten years of reliable backup.
High-quality safety assurance guaranteed.

Main Highlights

【Wired or Wireless Connection 】This mains smoke alarm can be hardwired or wirelessly connected to up to 50, so when one alarm is triggered, they all sound and notify everyone of the emergency
【Hardwired and 10 Years Tamperproof Backup Battery Installed】The wired smoke alarm mains powered can be connected for use in addition to the 10 years tamperproof battery backup. When the power goes out in your house, the detector will still keep you safe
【High Quality Assurance】The mains powered smoke alarms have a 10-year sensor life and a reliable, high-performance chip to provide you with powerful protection. Products meet BS EN 14604:2005 standards, compliant with england, scotland and Wales Legislation to ensure peace of mind
【Customizable Wireless Network】This alarm can be interlinked with our interlinked range. You can create various grouped networks to meet your needs and interconnect alarms with the SAFE-TECH AJ Series, so that when one alarm is triggered, all of them go off, fully protecting your home and family
【Silence Mode】Worried about false positives? The smoke detector has a silence button, you can hold it down to calm it
Compatible with interlinked alarms and 7.0” panel

Andyssey GS517A Wired Smoke Alarm Mains powered, Interlinked Mains Smoke Detector 1 Year Replaceable Battery Back-up, Fire Alarm with Silence Button, EN 14604 Standard (2-PACK)

Andyssey GS517A Wired Smoke Alarm Mains powered, Interlinked Mains Smoke Detector 1 Year Replaceable Battery Back-up, Fire Alarm with Silence Button, EN 14604 Standard (2-PACK)

Andyssey

5% Off

Why we love it

Advanced fire hazard awareness.
Comprehensive fire safety modes.
Easy installation and operation.

Main Highlights

Advanced Photoelectric Smoke Detection: This mains smoke alarm uses cutting-edge photoelectric technology to detect slow-smoldering fires with thick, black smoke, providing early warning for fire hazards that might otherwise go unnoticed.
Reliable Power with Battery Backup: Operating on AC220~240V/50Hz power with a DC9V battery backup, this hard wired smoke alarm ensures continuous protection, even during power outages. It also alerts you when the battery is low, for added peace of mind.
Silent and User-Friendly Features: Enjoy a hassle-free experience with easy installation, a convenient mute function, and a simple test mode for regular maintenance. The user-friendly design of GS517A hard wired smoke detectors ensures effortless operation and testing.
Efficient Interconnection for Enhanced Safety: This smoke alarm system can be interconnected with up to 12 devices, providing synchronized alerts across multiple locations in your home, office, or building for comprehensive fire safety coverage.
Meets Strict Safety Standards: Certified to EN14604:2005/AC-2008 standards, this mains fire alarm meets high-quality requirements for sensitivity, sound volume, and operational performance, ensuring reliable and accurate fire detection.

Andyssey GS517A Wired Smoke Alarm Mains powered, Interlinked Mains Smoke Detector 1 Year Replaceable Battery Back-up, Fire Alarm with Silence Button, EN 14604 Standard (2-PACK)

5% Off

Why we love it

Advanced fire hazard awareness.
Comprehensive fire safety modes.
Easy installation and operation.

Main Highlights

Advanced Photoelectric Smoke Detection: This mains smoke alarm uses cutting-edge photoelectric technology to detect slow-smoldering fires with thick, black smoke, providing early warning for fire hazards that might otherwise go unnoticed.
Reliable Power with Battery Backup: Operating on AC220~240V/50Hz power with a DC9V battery backup, this hard wired smoke alarm ensures continuous protection, even during power outages. It also alerts you when the battery is low, for added peace of mind.
Silent and User-Friendly Features: Enjoy a hassle-free experience with easy installation, a convenient mute function, and a simple test mode for regular maintenance. The user-friendly design of GS517A hard wired smoke detectors ensures effortless operation and testing.
Efficient Interconnection for Enhanced Safety: This smoke alarm system can be interconnected with up to 12 devices, providing synchronized alerts across multiple locations in your home, office, or building for comprehensive fire safety coverage.
Meets Strict Safety Standards: Certified to EN14604:2005/AC-2008 standards, this mains fire alarm meets high-quality requirements for sensitivity, sound volume, and operational performance, ensuring reliable and accurate fire detection.

Twin Pack Kidde Firex KF20 Mains Powered Optical Smoke Alarm with 9V Back Up Batteries | KF2 | 4973

Kidde

Why we love it

Interlinked network for safety.
Reduced energy consumption.
Tamper-resistant and durable.

Main Highlights

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.
Interlink with up to 23 Kidde Firex hard-wired alarms – all alarms sound if danger is detected
Mains operation – 9V Alkaline back-up battery supplied as standard
Reduced energy consumption – lower lifetime running costs (* compared to previous Firex alarms)
Combined Test/HushTM button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
Dust compensation and bug screen – reduces nuisance alarms
Alarm memory – identifies source unit within interconnecting network
Auto reset after activation
Tamper-resistant locking device prevents unauthorised removal without the use of a tool
Warranty 6 years, BSI certified to BS EN14604:2005 and CE tested and certified to 0086-CPD-535595 15 EN14604:2005

Twin Pack Kidde Firex KF20 Mains Powered Optical Smoke Alarm with 9V Back Up Batteries | KF2 | 4973

Why we love it

Interlinked network for safety.
Reduced energy consumption.
Tamper-resistant and durable.

Main Highlights

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.
Interlink with up to 23 Kidde Firex hard-wired alarms – all alarms sound if danger is detected
Mains operation – 9V Alkaline back-up battery supplied as standard
Reduced energy consumption – lower lifetime running costs (* compared to previous Firex alarms)
Combined Test/HushTM button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
Dust compensation and bug screen – reduces nuisance alarms
Alarm memory – identifies source unit within interconnecting network
Auto reset after activation
Tamper-resistant locking device prevents unauthorised removal without the use of a tool
Warranty 6 years, BSI certified to BS EN14604:2005 and CE tested and certified to 0086-CPD-535595 15 EN14604:2005

FireAngel Mains Smoke Alarm - SW10-EUT Mains Powered Optical Smoke Detector with Replaceable Long Life Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators

FireAngel Mains Smoke Alarm - SW10-EUT Mains Powered Optical Smoke Detector with Replaceable Long Life Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators

Fireangel

Why we love it

Reliable protection during outages.
Fast response to slow fires.
Connected alarms for comprehensive safety.

Main Highlights

SMOKE DETECTORS FOR HOME: The SW10-EUT mains powered optical smoke alarm has a longlife lithium backup battery for protection during outages. It detects slow-burning fires, making it ideal for living spaces. For full coverage, consider FireAngel Thermoptek Alarms.
ENHANCED SENSING: The high performance optical smoke sensor ‘sees’ white smoke as it enters the alarm, providing a fast response to slow, smouldering fires while being less prone to false alarms.
LINKED SMOKE ALARMS: The SW10-EUT functions as a standalone unit or can be wired with up to 12 other mains powered smoke (SW10 / SW1), heat (HW10 / HW1). All alarms sound simultaneously if one is triggered.
SAFETY ASSURED: The SW10-EUT mains smoke alarm meets British Safety Standard EN 14604: 2005 and is designed for domestic use. It comes with a 5 year warranty.
SLEEP EASY: The Sleep Easy function allows you to silence low battery chirps for up to 8 hours, ensuring an uninterrupted night’s sleep while still keeping your home protected.

FireAngel Mains Smoke Alarm - SW10-EUT Mains Powered Optical Smoke Detector with Replaceable Long Life Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators

Why we love it

Reliable protection during outages.
Fast response to slow fires.
Connected alarms for comprehensive safety.

Main Highlights

SMOKE DETECTORS FOR HOME: The SW10-EUT mains powered optical smoke alarm has a longlife lithium backup battery for protection during outages. It detects slow-burning fires, making it ideal for living spaces. For full coverage, consider FireAngel Thermoptek Alarms.
ENHANCED SENSING: The high performance optical smoke sensor ‘sees’ white smoke as it enters the alarm, providing a fast response to slow, smouldering fires while being less prone to false alarms.
LINKED SMOKE ALARMS: The SW10-EUT functions as a standalone unit or can be wired with up to 12 other mains powered smoke (SW10 / SW1), heat (HW10 / HW1). All alarms sound simultaneously if one is triggered.
SAFETY ASSURED: The SW10-EUT mains smoke alarm meets British Safety Standard EN 14604: 2005 and is designed for domestic use. It comes with a 5 year warranty.
SLEEP EASY: The Sleep Easy function allows you to silence low battery chirps for up to 8 hours, ensuring an uninterrupted night’s sleep while still keeping your home protected.

Aico Ei146e Optical Smoke Alarm AC mains power supply and 9V alkaline battery back-up.

Aico Ei146e Optical Smoke Alarm AC mains power supply and 9V alkaline battery back-up.

Aico

Why we love it

Reliable power supply options.
Easy remote control features.
Durable hardwire interconnect.

Main Highlights

AC mains power supply and 9V alkaline battery back-up.
Ei146e Optical Smoke Alarm
Remote Test, Locate and Silence compatible
Hardwire interconnect
Detector may vary

Aico Ei146e Optical Smoke Alarm AC mains power supply and 9V alkaline battery back-up.

Why we love it

Reliable power supply options.
Easy remote control features.
Durable hardwire interconnect.

Main Highlights

AC mains power supply and 9V alkaline battery back-up.
Ei146e Optical Smoke Alarm
Remote Test, Locate and Silence compatible
Hardwire interconnect
Detector may vary

Smoke Alarm with Wireless Interlink - Mains Powered Fire Alarm With 10 Year Battery Backup - Kitemark Certified to BS EN 14604 - Wirelessly Interlink with Firechief Alarms for Home - FSM10W Model

Smoke Alarm with Wireless Interlink - Mains Powered Fire Alarm With 10 Year Battery Backup - Kitemark Certified to BS EN 14604 - Wirelessly Interlink with Firechief Alarms for Home - FSM10W Model

Firechief

6% Off

Why we love it

Reliable smoke detection technology.
Seamless interlinked safety system.
10-year battery backup included.

Main Highlights

Optical smoke sensing technology and automatic dust compensation - the smart smoke detector technology means that these units are less prone to false alarms and are a reliable safety feature for homes
Wirelessly interlink with up to 40 alarms - fire alarms for home settings are essential and interlinked smoke alarms and a heat alarm create a seamless safety system to protect your loved ones
Mains powered with 10-year battery back up - this mains and battery smoke alarm is mains powered for reliability but also supplied with a 10-year sealed smoke alarm battery for peace of mind
Loud audible alarm & LED indicators - this reliable mains smoke alarm immediately notifies you of potential danger. These smoke detectors for home give you time to evacuate and get to safety
Kitemarked and with a 5-year warranty - the qualifying Firechief heat, smoke and carbon monoxide alarm range comes with a 5-year warranty and this smoke alarm is kitemarked, certifying its top quality
Helping you manage fire risks since 1963 - We want to make the world a safer place with effective fire safety equipment. Your peace of mind means a lot to our family business and our wonderful team

Smoke Alarm with Wireless Interlink - Mains Powered Fire Alarm With 10 Year Battery Backup - Kitemark Certified to BS EN 14604 - Wirelessly Interlink with Firechief Alarms for Home - FSM10W Model

6% Off

Why we love it

Reliable smoke detection technology.
Seamless interlinked safety system.
10-year battery backup included.

Main Highlights

Optical smoke sensing technology and automatic dust compensation - the smart smoke detector technology means that these units are less prone to false alarms and are a reliable safety feature for homes
Wirelessly interlink with up to 40 alarms - fire alarms for home settings are essential and interlinked smoke alarms and a heat alarm create a seamless safety system to protect your loved ones
Mains powered with 10-year battery back up - this mains and battery smoke alarm is mains powered for reliability but also supplied with a 10-year sealed smoke alarm battery for peace of mind
Loud audible alarm & LED indicators - this reliable mains smoke alarm immediately notifies you of potential danger. These smoke detectors for home give you time to evacuate and get to safety
Kitemarked and with a 5-year warranty - the qualifying Firechief heat, smoke and carbon monoxide alarm range comes with a 5-year warranty and this smoke alarm is kitemarked, certifying its top quality
Helping you manage fire risks since 1963 - We want to make the world a safer place with effective fire safety equipment. Your peace of mind means a lot to our family business and our wonderful team

FireAngel Mains Smoke Alarm - SW1-R Mains Powered Optical Smoke Detector with Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators - White

FireAngel Mains Smoke Alarm - SW1-R Mains Powered Optical Smoke Detector with Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators - White

Fireangel

24% Off

Why we love it

Detects all types of fire.
Reliable battery back-up power.
Large central test button.

Main Highlights

SMOKE DETECTORS FOR HOME: The SW1-R mains powered optical smoke alarm has a 9V backup battery for protection during outages. It detects slow-burning fires, making it ideal for living spaces. For full coverage, consider FireAngel Thermoptek Alarms.
ENHANCED SENSING: The high performance optical smoke sensor ‘sees’ white smoke as it enters the alarm, providing a fast response to slow, smouldering fires while being less prone to false alarms.
LINKED SMOKE ALARMS: The SW1-R functions as a standalone unit or can be wired with up to 12 other mains powered smoke (SW1), heat (HW1), or carbon monoxide (CW1) alarms. All alarms sound simultaneously if one is triggered.
SAFETY ASSURED: The SW1-R mains smoke alarm meets British Safety Standard EN 14604: 2005 and is designed for domestic use. It comes with a 5 year warranty.
SLEEP EASY: The Sleep Easy function allows you to silence low battery chirps for up to 8 hours, ensuring an uninterrupted night’s sleep while still keeping your home protected.

FireAngel Mains Smoke Alarm - SW1-R Mains Powered Optical Smoke Detector with Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators - White

24% Off

Why we love it

Detects all types of fire.
Reliable battery back-up power.
Large central test button.

Main Highlights

SMOKE DETECTORS FOR HOME: The SW1-R mains powered optical smoke alarm has a 9V backup battery for protection during outages. It detects slow-burning fires, making it ideal for living spaces. For full coverage, consider FireAngel Thermoptek Alarms.
ENHANCED SENSING: The high performance optical smoke sensor ‘sees’ white smoke as it enters the alarm, providing a fast response to slow, smouldering fires while being less prone to false alarms.
LINKED SMOKE ALARMS: The SW1-R functions as a standalone unit or can be wired with up to 12 other mains powered smoke (SW1), heat (HW1), or carbon monoxide (CW1) alarms. All alarms sound simultaneously if one is triggered.
SAFETY ASSURED: The SW1-R mains smoke alarm meets British Safety Standard EN 14604: 2005 and is designed for domestic use. It comes with a 5 year warranty.
SLEEP EASY: The Sleep Easy function allows you to silence low battery chirps for up to 8 hours, ensuring an uninterrupted night’s sleep while still keeping your home protected.

We scanned 1760 products

We reviewed these offers relevant to the Mains Fire Smoke Detector within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Kidde, Hispec Electrical Products Limited, SAFE TECH, Andyssey, Fireangel, Aico, Firechief, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Mains Fire Smoke Detector in the market, we considered we took a deep dive into 8801 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Kidde Firex KF Series Mains Powered Fire Alarms Kit (3 Smoke & 1 Heat) with Alkaline Back-up Battery. We love many things about this product by Kidde. What sets it apart from the competition is Ideal for home installation. , Reliable mains power support. , Includes a 6-year warranty. .
The best value product for most shoppers and where user satisfaction is continuously the highest is Kidde Firex KF Series Mains Powered Fire Alarms Kit (2 Smoke & 1 Heat) with Alkaline Back-up Battery by Kidde based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Mains Fire Smoke Detector and the best cost-to-value ratio is FireAngel Mains Smoke Alarm - SW1-R Mains Powered Optical Smoke Detector with Backup Battery - Wired, Interlinked Smoke Alarms for Home with Test Button and LED Indicators - Whiteat Fireangel with a 24% discount.
Our list of the best Mains Fire Smoke Detector is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.