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10 Best Smoke Alarms UK 2024

For most people, a smoke alarm is just an annoying white box that makes a racket when they burn their toast, but you should be thankful if you fall into that category. It's a sobering fact that hundreds of people die in the UK each year due to house fires, and sadly, more than half of these could have been prevented if the residents were alerted by a smoke alarm and vacated from the house in time. 


There is no excuse for not fitting your property with smoke alarms; they will provide the essential protection you need with minimal fuss. Our buying guide will help you work out what to look out for, including advice on battery and mains powered units, carbon monoxide detector combinations, and which devices are best for kitchens. Then, we'll go through our ten best smoke alarms available online from Kidde, FireAngel, and the linkable Google Nest. 

Last updated 26/03/2024
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Table of Contents

How to Choose a Smoke Alarm in the UK

Key Points to Consider
  1. Select An Alarm That Is Appropriate For The Room
  2. Pick a Sealed Battery For Longevity
  3. Choose An Alarm With A Built In Carbon Monoxide Detector
  4. Opt for A Linkable Alarm If You Have A Large House
1

Ionisation, Optical or Heat Sensitive? Select an Alarm Appropriate to the Space

Ionisation, Optical or Heat Sensitive? Select an Alarm Appropriate to the Space

Select Ionisation Smoke Alarms for Bedrooms and Living Rooms

Ionisation smoke alarms are probably what most of us picture of when we think of a smoke alarm. They are cheap, basic, and extremely sensitive to small smoke particles, meaning they're excellent at detecting fast flaming fires, but a pain in the neck if you're in the habit of overcooking things.


As such, this type of fire alarm is best placed well away from the kitchen or any other area where fumes or smoke accumulate. They are, however, ideal for bedrooms and living rooms, provided they are well away from the kitchen.

Opt For Optical Smoke Alarms to Detect Smouldering, Slow-Burning Fires

If you need to place a smoke alarm near, but not in, a kitchen, then an optical smoke alarm is a good option. They detect larger particles of smoke than ionisation types, so are less likely to be set off by accidental cooking disasters.


Optical smoke alarms are better at picking up on smouldering, slow-burning fires, and are a great choice for bedrooms and living rooms. For a full belt and braces approach, they could be alternated with ionisation alarms throughout the house.

Pick Heat Sensitive Alarms for Kitchens and Garages

Strictly speaking, heat alarms aren't actually smoke alarms. The sensors in heat alarms don't detect the fumes given off by a fire, but rather the sudden rise in temperature that would signal danger. This means that heat alarms are suitable for kitchens, and also garages, where car fumes might trigger a normal alarm.


However, heat alarms need to be relatively near the fire to pick up on this change in temperature, so for bigger kitchens, you might want to consider more than one alarm. But given that most house fires start in the kitchen, these are a type of smoke alarm you really can't do without.

2

Decide Between a Built-In or Replaceable Battery

Decide Between a Built-In or Replaceable Battery

Choose Alarms With 9 Volt or AA Batteries if You Want a Cost-Effective Option That's Easier to Replace

The most basic and common type of battery used in cheaper alarms is a standard 9 volt or AA battery. These can be bought anywhere for very little money and can be replaced simply by opening a flap on the smoke alarm and swapping them over.


Smoke alarms with this type of battery should be tested regularly, and the batteries should be replaced every 12 months. This means you'll need to remember to regularly buy batteries, but the smoke alarm itself will not need to be replaced unless it is damaged.

Go For Sealed Batteries if You're After a Longer-Lasting Option

Sealed batteries are fitted directly to the alarm and cannot be replaced, meaning that when the battery dies, the whole alarm needs to be changed. On the plus side, the maximum lifespan of these batteries is respectably long, as many are sold to last up to 10 years.


If the thought of a decade without hearing any annoying battery warning noises and worrying about when you last changed the batteries appeals to you, then these are the alarms for you. And while you may be reluctant to have to buy a new smoke alarm every 10 years, in models with carbon monoxide detection this will be necessary anyway, as this is the lifespan of their sensors. 

3

Consider a Built-In Carbon Monoxide Detector for Added Peace of Mind

Consider a Built-In Carbon Monoxide Detector for Added Peace of Mind

While less of a killer than fire, carbon monoxide poisoning is still responsible for dozens of deaths every year. It's caused by inhaling odourless fumes that can accumulate in your home from a number of sources, such as faulty boilers or gas fires.


It's therefore highly recommended that you have at least one carbon monoxide detector in your home, ideally in or near the bedrooms where there is more risk from inhalation while sleeping. 


Combination smoke and carbon monoxide detectors are perfect for obtaining both types of protection in one convenient unit. But their sensitivity to the gas does not last forever, so you should pay particular attention to the manufacturer's recommended life span for the device.

4

Seek Out a Linkable Alarm if You Have a Large Property

Seek Out a Linkable Alarm if You Have a Large Property
Source:amazon.co.uk

If there's a chance a smoke alarm going off downstairs won't wake you while you sleep, then you should really think about getting a series of alarms that can be linked up as a network. This means that if one device senses smoke, all the linked alarms in your home will go off.


Linkable alarms connect with each other either via radio signals or via your home wifi. Some more advanced models can even connect with other devices such as burglar alarms to create a full home security network, so may be worth considering if you have a large property. 


Looking to create a home security network have a look at the 10 best outdoor home security cameras to find a device that will protect your home from external factors.

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10 Best Smoke Alarms in the UK

mybest UK product recommendations are reviewed and curated by our writers in-house. We focus on in-depth research and analysis of product reviews to carefully select the best products available for the best prices.
Popularity
Products
Image
Click to purchase
Price
Key features
1

Google

Nest Smoke and Carbon Monoxide Alarm

Google Nest Smoke and Carbon Monoxide Alarm 1

£108.00

High

Hi-Tech Smoke and Carbon Monoxide Alarm With Full Connectivity

2

Sebson

Wireless Smoke Heat AlarmGS559A

Sebson Wireless Smoke Heat Alarm 1

£25.99

Mid

An Optical Alarm With a Connectivity Option

3

Jalo

Kupu Optical Smoke Alarm

Jalo Kupu Optical Smoke Alarm 1

£28.20

Mid

Add a Pop of Colour to Your Home as Well as an Extra Level of Security

4

HEYI

Smoke Alarm‎HY-620

HEYI Smoke Alarm 1

£19.99

Low Mid

For Night-Time Alerts There's an Escape Light

5

FireAngel

Heat AlarmHT-630R

FireAngel Heat Alarm 1

£23.29

Mid

Heat-Sensitive Alarm Great for Kitchens and Garages

6

Kidde

Smoke and Carbon Monoxide Alarm10SCO

Kidde Smoke and Carbon Monoxide Alarm 1

£19.99

Low Mid

Built-in Voice Alerts For Extra Peace of Mind

7

X-Sense

Smoke and Carbon Monoxide Alarm With Display

X-Sense Smoke and Carbon Monoxide Alarm With Display 1

£30.99

High Mid

Extra Safety With a Built-in Carbon Monoxide Detector and Handy Display

8

Heiman

Mini Smoke Alarm

Heiman Mini Smoke Alarm 1

£16.99

Low

Super-Compact, Barely Noticeable Optical Alarm

9

Jalo

Lento Optical Smoke Alarm

Jalo Lento Optical Smoke Alarm 1

£34.95

High Mid

An Eye-Catching Alternative to the White Box

10

Kidde

3 Year Smoke Alarm Twin Pack

Kidde 3 Year Smoke Alarm Twin Pack 1

£18.87

Low Mid

Twin Pack of Optical Alarms With Hush Button

If you don't see the product you're looking for, you can request that it be listed.
No.1

GoogleNest Smoke and Carbon Monoxide Alarm

Nest Smoke and Carbon Monoxide Alarm 1
Source:johnlewis.com
Reference price
£108.00
High
Reference price
£108.00
High

Hi-Tech Smoke and Carbon Monoxide Alarm With Full Connectivity

£100 for a smoke alarm may seem like a big investment, but this alarm from Google lives up to its price tag. For one thing, it connects to your home's wifi, allowing you to control and monitor the alarm through the Google Nest app.


Plus, you can silence the alarm from your phone, and it will notify you if the alarm is activated when you're not home. There's also a light to guide your way at night, and it connects with all other devices in the Google Nest range. The sensors are truly top of the range, and will only need replacing every 10 years. 

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No.2

SebsonWireless Smoke Heat AlarmGS559A

Wireless Smoke Heat Alarm 1
Source:amazon.co.uk
Reference price
£25.99
Mid
Reference price
£25.99
Mid

An Optical Alarm With a Connectivity Option

In case of excessive smoke and unusually high room temperature this photoelectronic wireless smoke detector will activate and sound an alarm. The thing that sets it apart, however, is the option to connect up to multiple units of the same alarm using radio frequency.


Create a wireless network of 15 smoke detectors all within 35m of each other; as soon as one alarm activates they all go. Easy and quick to install with a magnetic fixing included, the alarm is neat and unobtrusive.

No.3

JaloKupu Optical Smoke Alarm

Kupu Optical Smoke Alarm 1
Source:amazon.co.uk
Reference price
£28.20
Mid
Reference price
£28.20
Mid

Add a Pop of Colour to Your Home as Well as an Extra Level of Security

If you hate the thought of a clunky white plastic box ruining your carefully curated domestic aesthetic, then this colourful alternative might be just what you're after. The minimalist design comes in six colours, including a metallic chrome finish.


At almost £30 for a simple optical smoke alarm, you really are paying predominantly for the design. But if it's all your home requires, and it means you have a smoke alarm set up when you otherwise wouldn't, then it's worth every penny.

No.4

HEYISmoke Alarm‎HY-620

Smoke Alarm 1
Source:amazon.co.uk
Reference price
£19.99
Low Mid
Reference price
£19.99
Low Mid

For Night-Time Alerts There's an Escape Light

When detecting smoke in the air, this device not only sets off an alarm but also turns on a bright escape light, illuminating your route out of the building, making it ideal for hallways and landings.


The light also serves another useful function – it provides a visual notification that the alarm is going off. This could be useful for people who are hard of hearing or for environments where a normal alarm might not always be audible.

No.5

FireAngelHeat AlarmHT-630R

Heat Alarm 1
Source:amazon.co.uk
Reference price
£23.29
Mid
Reference price
£23.29
Mid

Heat-Sensitive Alarm Great for Kitchens and Garages

This smoke alarm from FireAngel uses a heat sensor to detect rapid changes in temperature. This sensitivity to heat, rather than smoke, means it won't be set off by cooking or vehicle fumes.


As such, it's ideal for use in a kitchen or garage, where burning toast or your car's exhaust set off other types of alarm. The company's patented Thermistek sensor responds up to twice as fast as other heat-sensitive alarms, giving you invaluable extra time to react.

No.6

KiddeSmoke and Carbon Monoxide Alarm10SCO

Smoke and Carbon Monoxide Alarm 1
Source:amazon.co.uk
Reference price
£19.99
Low Mid
Reference price
£19.99
Low Mid

Built-in Voice Alerts For Extra Peace of Mind

This combination smoke and carbon monoxide alarm comes from Kidde, one of the leading names in fire safety products, so you can trust it will work well when it's important.


The unique selling point of this alarm is that upon detecting smoke or carbon monoxide, a voice alert rather than an alarm sound goes off. This voice alert tells you which of the two dangers has been detected, allowing you to act accordingly.

No.7

X-SenseSmoke and Carbon Monoxide Alarm With Display

Smoke and Carbon Monoxide Alarm With Display 1
Source:amazon.co.uk
Reference price
£30.99
High Mid
Reference price
£30.99
High Mid

Extra Safety With a Built-in Carbon Monoxide Detector and Handy Display

For people who are particularly concerned about levels of carbon monoxide in the home, the practical LCD display on this alarm will bring peace of mind. The display shows the concentration of the dangerous gas in real-time, so you'll know if something's amiss before it becomes too serious.


As well as the LCD display, there's also three coloured LEDs to give information on the safe functioning of the alarm, and a silence button to cancel false alarms.

No.8

HeimanMini Smoke Alarm

Mini Smoke Alarm 1
Source:amazon.co.uk
Reference price
£16.99
Low
Reference price
£16.99
Low

Super-Compact, Barely Noticeable Optical Alarm

The smallest smoke alarm on our list, this is a great pick if the size is an issue and you require something that takes up as little space as possible. This award-winning alarm has an advanced chipset that can detect dangerous smoke concentrations in seconds.


As well as it's neat proportions, another nice feature is the long-lasting battery. It's built into the alarm and can also be replaced, offering the best of both worlds in terms of a good battery life and not needing to buy new alarms. 

No.9

JaloLento Optical Smoke Alarm

Lento Optical Smoke Alarm 1
Source:amazon.co.uk
Reference price
£34.95
High Mid
Reference price
£34.95
High Mid

An Eye-Catching Alternative to the White Box

With a real 'love it or hate it', design, this one definitely won't be everyone's cup of tea! This is a smoke alarm for people who really want to make a statement with their home decor, or perhaps a bit of fun for a kids bedroom. 


As with the other Jalo alarm on our list, it's got a hefty price tag given how simple the technology is. But if you're after something interesting to put on your wall, do consider this, or the Jalo Kupu alarm below.

No.10

Kidde3 Year Smoke Alarm Twin Pack

3 Year Smoke Alarm Twin Pack 1
Source:argos.co.uk
Reference price
£18.87
Low Mid
Reference price
£18.87
Low Mid

Twin Pack of Optical Alarms With Hush Button

This twin pack of smoke alarms from Kidde enables you to provide a wide range of coverage throughout your home; place one downstairs and the other upstairs to ensure your family's safety.


One added feature that makes it stand out from other cheaper alarms is the hush button. This means that in the case of a false alarm (such as the standard burning toast), the alarm can be temporarily silenced at the touch of a button, avoiding the need for flapping around it with tea towels.

Know How Many and Where You Should Place Your Alarms

Know How Many and Where You Should Place Your Alarms

Now you've chosen your alarm, you may be wondering how many you'll need, and where to put them. For maximum peace of mind and protection, you should ensure you have an adequate amount of alarms, and that they are placed in the best possible location.


As an absolute minimum, there should be one smoke alarm for each floor of your home, but seeing as fires can start anywhere, it's strongly recommended that you have an alarm in every room and every passageway. Smoke alarms should not be placed in the bathroom, however, as the steam created by hot water can too easily set them off. 


In terms of placement, you want to try and make sure that your smoke alarms are as close as possible to the centre of the room, and at least 30 cm from walls and light fittings. Wherever they are placed, you must be able to hear the alarm from all parts of your home.

Top 5 Smoke Alarms

No. 1: GoogleNest Smoke and Carbon Monoxide Alarm

No. 2: SebsonWireless Smoke Heat AlarmGS559A

No. 3: JaloKupu Optical Smoke Alarm

No. 4: HEYISmoke Alarm‎HY-620

No. 5: FireAngelHeat AlarmHT-630R

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The descriptions of each product are referenced from content available on manufacturer, brand, and e-commerce sites.
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