Smoke Alarms

Protecting your home starts with the right smoke alarms. We stock battery and mains-powered options, optical smoke alarms for living spaces and heat alarms designed for kitchens and garages. Need coverage throughout an entire building? Our radio-interlinked systems trigger all connected alarms when one detects smoke, so you'll hear the warning wherever you are. Long-life sealed battery alarms give you 10 years of protection without changing batteries. And our specialist alarms for hearing-impaired users ensure everyone gets adequate warning in an emergency.

UK landlords and homeowners must meet specific smoke alarm regulations, which vary across England, Scotland, Wales and Northern Ireland. We've put together compliant alarm bundles for each region, so you don't have to navigate the legislation yourself. You'll also find:

Combined multi-sensor alarms that detect both smoke and carbon monoxide
Replacement alarms for discontinued models
Accessories and batteries for existing systems

Browse our selection today to find the right smoke alarms for your property. We back every purchase with our 30-day returns policy.

All Smoke Alarms

Our range of smoke detectors & heat alarms include battery & mains powered, radio-interlinked & 10 year sealed alarms.

Battery Smoke Alarms

A selection of domestic alarms that combine smoke and CO detectors into a single device, easing maintenance and saving lives.

Mains Smoke Alarms

Mains powered smoke detectors and heat alarms certified to BS 5839 Part 6 Grades D, D1, & D2 for new domestic buildings and extensions.

Radio-Interlinked Smoke Alarms

Radio-interlinked smoke alarms connect through radio frequency signals to ensure a fire alarm is heard in the entire building.

Optical Smoke Alarms

Optical smoke alarms are good at detecting smouldering fires such as soft furnishing. Best for living rooms, bedrooms & hallways.

Heat Alarms

Heat alarms detect changes in temperature in a room. Ideal for kitchens & garages where smoke or mist may often be present.

Longlife Battery Smoke Alarms

Smoke detectors and heat alarms with sealed-in longlife lithium batteries that don't require replacing and last for 10 years.

Combined Alarms with Multiple Sensors

Multi-sensor alarms combine different sensor types such as CO detectors and smoke detectors for optimum protection.

Replacement Smoke and Heat Alarms

A range of ideal replacement alarms for discontinued products in the Aico, Ei Electronics, DETA and BRK ranges.

Hearing Impaired Smoke Alarms

This range of devices are designed to alert those with poor / no hearing to fire danger. Wired & wireless alarm systems available.

English Landlord Regulation Alarms

Comply with the updated landlords regulations in England from October 2022 with this range of smoke, heat, and carbon monoxide alarms.

Scottish Regulation Alarms

Our range of smoke, heat, and carbon monoxide alarms suitable for the updated legislation coming into effect in Scotland in February 2022.

Welsh Regulation Alarms

Smoke, heat, and carbon monoxide alarms for Welsh landlords to comply with the updated regulations coming into effect in July 2022.

Northern Ireland Landlord Regulation Alarms

Buy smoke and carbon monoxide alarms suitable for rental properties in Northern Ireland. Ensure compliance with the latest legislation.

Smoke Alarm Batteries & Accessories

Replacement batteries for smoke alarms, fixing kits and other accessories for alarm installation and maintenance.

Smoke Alarm Bundles

Complete smoke alarm bundles for total home coverage from leading brands such as Kidde, Black & Decker & Aico.

List Grid

Two white Firehawk mains‑powered alarms, one with a plain circular front and the other showing a fan‑style heat‑sensing grid.

Mains Powered Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Firehawk BB Series

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These Firehawk mains-powered smoke and heat alarms with hardwire interlink and replaceable AAA alkaline back-up batteries are suitable for Grade D2 systems to warn all occupants of a fire.

230V mains power with alkaline battery backup
6 years manufacturer's warranty
Hardwire interlink up to 15 Firehawk FHN smoke and heat alarms.
Also suitable for the 2022 Scottish legislation

5 out of 5 stars

From: £20.09 inc VAT

£16.74 ex VAT

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Two round white Aico Ei140e series alarms with simple front panels, one with a smooth finish and one with a vented heat‑sensor grid.

Mains Powered Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Aico Ei140e Series

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230V mains powered with alkaline back-up battery
Available in Optical and Heat versions (Ei146e, Ei144e)
Made in Ireland by Ei Electronics
Interlinks with up to 12 units
Kitemarked, CE marked and suitable for BS 5839-6: 2019 Grade D2 installations
Please note: Alarms are sold individually
Also suitable for both the Welsh and Scottish 2022 legislation

4.9 out of 5 stars

From: £38.75 inc VAT

£32.29 ex VAT

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White circular smoke alarm labeled “FIRE AND CO DETECTION” with a central button for testing and silencing, and indicators for “AC POWER” and “ALARM.”

Mains Powered Radio-Interlink Smoke & Heat Alarms with Lithium Back-Up Battery - Hispec RF10-PRO

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These mains-powered alarms from Hispec feature RF10-PRO wireless interlink for whole-house coverage, with a sealed rechargeable lithium back-up battery and 5-year manufacturer's warranty.

Optical Smoke and Heat sensor types available
Wireless interlink up to 20 RF10-PRO devices
Test & Hush feature, compatible with Hispec Remote Control
Compliant with Scottish 2022, Welsh Landlord 2022, and Northern Ireland Landlord 2024 legislation

4.7 out of 5 stars

From: £76.99 inc VAT

£64.16 ex VAT

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Two round white Aico Ei3000 Series alarms, featuring circular test buttons and distinct vented sensor areas for smoke and heat detection.

Mains Radio-Interlink Smoke Alarms & Heat Alarms with Self-Charging 10 Year Back-up Battery - Aico Ei3000RF Series

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Available in Optical, Heat and Combined Optical and Heat
Mains powered alarms with tamper-proof lithium back-up batteries
Suitable for BS 5839-6: 2019 Grade D1 installations
Supplied with an Ei3000MRF SmartLINK Module for radio-interlinking
Hybrid (wired or wireless) interlinking with up to 12 compatible devices
Please note: alarms are sold individually
Also suitable for both the Welsh and Scottish 2022 legislation

4.7 out of 5 stars

~~£123.22 inc VAT~~

From: £112.27 inc VAT

£93.56 ex VAT

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Mains Radio-Interlink Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Aico Ei140eRF Series

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230V mains powered with alkaline back-up battery
Available in Optical and Heat versions (Ei146eRF, Ei144eRF)
Interlinks via radio frequency with up to 12 units
Kitemarked, CE marked and suitable for BS 5839-6: 2019 Grade D2
All alarms also act as repeaters
Please note: alarms are sold individually
Also suitable for both the Welsh and Scottish 2022 legislation

4.7 out of 5 stars

~~£116.86 inc VAT~~

From: £105.91 inc VAT

£88.26 ex VAT

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Front view of aico mains powered heat alarm self charging 10yr battery backup showing circular white design and central button

Mains Radio-Interlinked Heat Alarm with Self-Charging 10 Year Back-up Battery - Aico Ei3014RF

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230V mains powered heat alarm with rechargeable lithium backup battery
Supplied with SmartLINK module for radio-interlinking with up to 12 devices
CE and Kitemarked to BS 5446-2: 2003
Suitable for BS 5839-6: 2019 Grade D1 installations
Contains AudioLINK allowing users to extract real time data to their phone
5 year manufacturer's warranty
Also suitable for the 2022 Scottish legislation

Customer Reviews

£124.42 inc VAT

£103.68 ex VAT

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hispec rf combi mains heat carbon monoxide detector shown from the front with visible test button and indicator lights

Mains Powered Heat & CO Detector with Rechargeable Lithium Battery Backup - Hispec RF10-PRO

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Power: 230V mains powered with lithium back-up battery
Back-up Battery: Rechargeable lithium battery
Warranty: 5 year manufacturer's warranty
Multi-sensor alarm containing both an heat and CO sensor
Radio-interlink up to 20 compatible alarms
Kitemarked to BS 5446-2: 2003 (heat)
Kitemarked to BS EN 50291-1: 2018 (carbon monoxide)
Also suitable for both the Welsh and Scottish 2022 legislation

Customer Reviews

£134.05 inc VAT

£111.71 ex VAT

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Front view of the aico combined mains powered combined heat carbon monoxide alarm with self charging 10 year battery backup

Mains Powered Combined Heat and Carbon Monoxide Alarm with Self-Charging 10 Year Back-up Battery - Aico Ei3028

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Product Lifespan: 10 years
Power: 230V mains powered with battery backup
Backup Battery: Re-chargeable lithium battery
Warranty: 5 year warranty
Hardwire interlink with up to 12 compatible devices
Compatible with Ei3000MRF SmartLINK module
Kitemarked to BS EN 50291-1: 2010 (CO gas)
Kitemarked to BS 5446-2: 2003 (heat)
Suitable for ceiling installation
Also suitable for both the Welsh and Scottish 2022 legislation

5 out of 5 stars

£90.23 inc VAT

£75.19 ex VAT

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Front view of hispec radio frequency combo mains smoke heat detector showing its circular design and test button

Mains Powered Smoke & Heat Alarm with Rechargeable Lithium Battery Backup - Hispec RF10-PRO

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Power: 230V mains powered with lithium back-up battery
Back-up Battery: Rechargeable lithium battery
Warranty: 5 year manufacturer's warranty
Multi-sensor alarm containing both a smoke and heat sensor
Radio-interlink up to 20 compatible alarms
Kitemarked to BS EN 14604: 2005 (smoke)
Kitemarked to BS 5446-2: 2003 (heat)
Also suitable for both the Welsh and Scottish 2022 legislation

Customer Reviews

£136.55 inc VAT

£113.79 ex VAT

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Front view of ultrafire battery optical smoke alarm showing circular shape and central square button

Battery Optical Smoke Alarm - UltraFire UBS1

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Battery: 9V alkaline battery (included)
Warranty: 10 year warranty
Large test and hush button
High performance optical sensor
Suitable for BS 5839-6: 2019 Grade F2 installations
Certified to BS EN 14604: 2005

4.8 out of 5 stars

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Free Delivery

Front view of the ultra fire smoke alarm showing its round white design and central sensor area

10 Year Longlife Battery Optical Smoke Alarm - UltraFire ULLS10

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Powered by a 10 year sealed lithium battery and featuring an optical smoke sensor specially designed to maximise smoke detection and minimise false alarms, this alarm provides top-class standalone protection.

Battery: 10 year sealed lithium battery
Warranty: 10 year manufacturer's warranty
Optical smoke sensor suitable for hallways, landings, living rooms, and bedrooms

4.8 out of 5 stars

This product is currently unavailable

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Pair of ultrafire ubs1 battery optical smoke alarms shown together as a twin pack group

Battery Optical Smoke Alarm - UltraFire UBS1 Twin Pack

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Battery: 9V alkaline battery (included)
Warranty: 10 year warranty
Large test and hush button
High performance optical sensor
2 x optical smoke alarms included
Suitable for BS 5839-6: 2019 Grade F2 installations
Certified to BS EN 14604: 2005

5 out of 5 stars

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Free Delivery

Group of three white battery smoke alarms and heat alarm home essentials kit items on a white background

Battery Smoke Alarms and Heat Alarm Home Essentials Kit - UltraFire UFUB1KIT

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FREE delivery
Battery: Alkaline batteries (included)
Warranty: 10 year warranty
Large test and hush button
2 x optical smoke alarms and 1 x heat alarm included
Suitable for BS 5839-6: 2019 Grade F2 installations
CE marked

4.6 out of 5 stars

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Front view of the Kidde battery optical smoke alarm showing test and hush buttons and indicator light

Battery Optical Smoke Alarm - Kidde 29HD

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Battery: 9V alkaline battery (included)
Warranty: 5 year warranty
Features test and hush buttons
Sleek and compact design
Suitable for BS 5839-6: 2019 Grade F2 installations
Certified to BS EN 14604: 2005

Customer Reviews

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aico heat alarm radio interlinked 10yr battery shown from the front with circular white design and vent openings

10 Year Longlife Battery Radio-Interlinked Heat Alarm - Aico Ei603RF

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Battery: Built-in, lasts the lifetime of your alarm
Warranty: 5 year warranty
Radio-interlinked heat alarm
Built-in RadioLINK+ repeater function
Self-tests every 16 seconds
Twist-on base design for simple installation
Suitable for BS 5839-6: 2019 Grade F1
Kitemarked to BS 5446-2: 2003
Also suitable for the 2022 Scottish legislation

Customer Reviews

Discontinued

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Front view of the firehawk mains smoke alarm alkaline battery showing a round white device with a small vent area

Mains Powered 2 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Batteries - Firehawk

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Power: 230V mains powered with alkaline back-up battery
Back-up Battery: 3 x AAA alkaline batteries (included)
Warranty: 6 year manufacturer's warranty
Hardwire interlink with up to 12 Firehawk FHN devices in total
Suitable for BS 5839-6: 2019 Grade D2 installations
Compliant with Scottish 2022, Welsh Landlord 2022, and Northern Ireland Landlord 2024 legislation

Customer Reviews

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Mains Powered 3 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Batteries - Firehawk

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Power: 230V mains powered with alkaline back-up battery
Back-up Battery: 3 x AAA alkaline batteries (included)
Warranty: 6 year manufacturer's warranty
Hardwire interlink with up to 12 Firehawk FHN devices in total
Suitable for BS 5839-6: 2019 Grade D2 installations
Compliant with Scottish 2022, Welsh Landlord 2022, and Northern Ireland Landlord 2024 legislation

Customer Reviews

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Mains Optical Smoke Alarm with Alkaline Battery Backup - Firehawk FHN250BB

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The Firehawk FHN250BB is a mains powered optical smoke alarm with an alkaline battery backup. It can be hardwired interlink up to 15 devices in one system including the Firehawk FHN250 or FHN450 alarms.

230V mains power with alkaline battery backup
6 years manufacturer's warranty
Hardwire interlink up to 15 Firehawk smoke and heat alarms.
Also suitable for both the Welsh and Scottish 2022 legislation

Customer Reviews

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Types of Smoke Alarm

Safelincs offer a wide range of smoke alarms and heat detectors from trusted brands. Choose from manufacturers such as Kidde, FireAngel, HiSPEC, UltraFire, Firehawk and Ei / Aico. Each alarm comes with a manufacturer’s warranty, is certified to the relevant British Standard, and is kitemarked / CE marked.

Ionisation Smoke Alarms

Ionisation smoke alarms use the oldest form of smoke detection and are very sensitive to smoke, especially to fast flaming fires such as burning paper. Ionisation smoke alarms are best installed on landings. Due to a small amount of radioactive material inside the detector, Ionisation alarms have now been discontinued by the manufacturers and are no longer available from Safelincs.

Optical Smoke Alarms

Optical smoke detectors are now the most common type of smoke alarm and are designed to 'see' smoke. They have a quick response rate to smouldering fires while being less sensitive to false alarms. Install optical smoke alarms near kitchens (not in kitchens), e.g. dining rooms and adjoining hallways, bedrooms, living rooms and landings where smouldering fires are more likely to occur.

Heat Alarms

Heat alarms are unlikely to false alarm, as they only measure the temperature in the room, not the smoke. They trigger an alarm only when a certain temperature is reached or when a very rapid rise in temperature is detected. Heat alarms are ideal for use in kitchens and garages as cooking fumes, steam and dust will not cause them to false alarm.

Wireless Smoke Detectors

Wireless smoke alarms are often also referred to as radio-interlinked smoke alarms. As stated in the name, 'wireless' smoke detectors require no wiring during installation. This type of alarm is radio-interlinked and battery powered so there is no need to connect it to the mains electricity supply. The main benefit of wireless, radio-interlinked smoke detectors is that they are easy to install and do not require an electrician. Purchasing radio-interlinked alarms will provide better protection for your home than standalone battery-powered alarms. This is because, if one smoke alarm detects a fire then all the smoke alarms in your home that are linked will sound. This gives residents the best and earliest chance of being alerted if a fire breaks out, and therefore the maximum time for escape. Longlife battery operated wireless smoke alarms mean that the user does not need to change the battery for the duration of the alarm life.

Our radio-interlinked smoke detectors are digitally coded which means that they are not affected by any other equipment or by a similar system being installed nearby. When the smoke alarm system is installed, a 'training-in' button is pressed on each smoke alarm which trains the alarms to recognise each other as a 'family'.

Wireless call points and other accessories can be installed and linked to the alarms, including compatible carbon monoxide alarms and deaf alerters.

Smoke Alarm Buying Guide

This is a short introduction to smoke and heat alarms classified in the British Standard BS5839 part 6 as Grade D and F. These smoke detectors are typically found in housing and small businesses/ organisations. For more detail help and advice please see our help guide.

In new built domestic properties and substantial extensions, Building Regulations will determine the standard applicable, usually Grade D.

Existing Buildings: Domestic, owner-occupied housing: BS5839 part 6 Grade F. Extensions of domestic, owner-occupied housing: BS5839 part 6 Grade D. Small businesses, church halls, many let properties: BS5839 part 6 Grade D with additional Manual Break Points in circulation spaces and sometimes additional Grade F smoke or heat alarms within let flats.

What do the different Grades mean?

Grade D:Mains-powered, interlinked smoke detectors and heat alarms. These are usually powered with a cable from the nearest light fitting. To create an interlink (all alarms go off at the same time in the case of a fire) they either require cable connection between the units or a radio-interlink connection. In businesses and larger let properties, these are often combined with manual break points.

With the appearance of ten year sealed smoke alarm units with radio-interlink, these are becoming more acceptable as an alternative to mains-powered, interlinked smoke alarms. Radio-interlinked manual break points with longlife batteries are also available. However, we still recommend you check with your Building Inspector (in case of extensions), Local Council (rented accommodation), Fire Service (business) to ensure these alternative alarms are acceptable.

Grade F:Battery operated, free standing smoke detectors and heat alarms. On their own they are mainly designed for domestic, owner-occupied housing. However, F Grade alarms with radio-interlink (especially when provided with 10 year sealed lithium batteries) can sometimes be installed as if they were Grade D. Again, we recommend that you check first with the relevant authority.

What's the Best Smoke Detector?

Choosing a smoke detector for your home is an important decision and you should consider which type if most suited to your property. If you live in Scotland, the smoke alarms you install have to meet the requirements of the 2022 Scottish legislation. If you live in England, Wales or Northern Ireland and do not rent your home out, you can choose which type of smoke alarm to fit.

The best smoke alarms for your homewill depend upon:

The size of your property
Who lives there
What fire risks there are
How many floors you have

The National Fire Chief’s Council (NFCC) advise at least one working smoke alarm on every floor and a heat alarm in the kitchen.

The Best Smoke Alarms for Living Areas and Hallways

Optical smoke alarms are recommended for living areas, bedrooms and landings or hallways. The following types of smoke alarms all use optical sensors:

Battery operated smoke alarms are easy to fit as they require no wiring. The most common type of battery smoke alarm uses an optical sensor. The cheapest alarms usually require the user to change the batteries periodically. Longlife battery smoke alarms are also available and use lithium batteries that last for the duration of the alarm’s lifespan.
Radio-interlinked alarms are usually battery operated with the added benefit of being linked together. Radio-interlinked smoke alarms are advised for the best possible protection because if one detects a fire, it will signal to all the other alarms to sound. This gives the occupants the best chance of being alerted to a fire, wherever they are in the home. It also therefore gives them the maximum time to escape. This is particularly important in homes with more vulnerable individuals such as babies and young children, the elderly or anyone with an impairment that would make it more difficult for them to escape.
Mains-powered alarms require an electrician to install them and are usually installed in new-builds as specified in Building Regulations Approved Document B. Mains-powered alarms can be interlinked.

The Best Smoke Alarms for Kitchens and Garages

Heat alarms are best suited to kitchens and garages. They work differently to smoke alarms as they detect a sudden rise in temperature rather than smoke particles. This makes them ideal for use in dusty areas or areas where there are cooking fumes as there is less chance of a false alarm.

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Smoke Alarms

All Smoke Alarms

Battery Smoke Alarms

Mains Smoke Alarms

Radio-Interlinked Smoke Alarms

Optical Smoke Alarms

Heat Alarms

Longlife Battery Smoke Alarms

Combined Alarms with Multiple Sensors

Replacement Smoke and Heat Alarms

Hearing Impaired Smoke Alarms

English Landlord Regulation Alarms

Scottish Regulation Alarms

Welsh Regulation Alarms

Northern Ireland Landlord Regulation Alarms

Smoke Alarm Batteries & Accessories

Smoke Alarm Bundles

Filter Products

Brand

Power Type

Positioning

Sensor Type

British Standard Grade

Local Legislation

Warranty

Connection

Product Range

Battery Type

Mains Powered Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Firehawk BB Series

Mains Powered Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Aico Ei140e Series

Mains Powered Radio-Interlink Smoke & Heat Alarms with Lithium Back-Up Battery - Hispec RF10-PRO

Mains Radio-Interlink Smoke Alarms & Heat Alarms with Self-Charging 10 Year Back-up Battery - Aico Ei3000RF Series

Mains Radio-Interlink Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - Aico Ei140eRF Series

Mains Radio-Interlinked Heat Alarm with Self-Charging 10 Year Back-up Battery - Aico Ei3014RF

Mains Powered Heat & CO Detector with Rechargeable Lithium Battery Backup - Hispec RF10-PRO

Mains Powered Combined Heat and Carbon Monoxide Alarm with Self-Charging 10 Year Back-up Battery - Aico Ei3028

Mains Powered Smoke & Heat Alarm with Rechargeable Lithium Battery Backup - Hispec RF10-PRO

Battery Optical Smoke Alarm - UltraFire UBS1

10 Year Longlife Battery Optical Smoke Alarm - UltraFire ULLS10

Battery Optical Smoke Alarm - UltraFire UBS1 Twin Pack

Battery Smoke Alarms and Heat Alarm Home Essentials Kit - UltraFire UFUB1KIT

Battery Optical Smoke Alarm - Kidde 29HD

10 Year Longlife Battery Radio-Interlinked Heat Alarm - Aico Ei603RF

Mains Powered 2 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Batteries - Firehawk

Mains Powered 3 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Batteries - Firehawk

Mains Optical Smoke Alarm with Alkaline Battery Backup - Firehawk FHN250BB

Types of Smoke Alarm

Ionisation Smoke Alarms

Optical Smoke Alarms

Heat Alarms

Wireless Smoke Detectors

Smoke Alarm Buying Guide

What's the Best Smoke Detector?

The Best Smoke Alarms for Living Areas and Hallways

The Best Smoke Alarms for Kitchens and Garages

FAQs (15)

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