Affordable Smoke Alarms UK: Essential Guide for Budget-friendly Safety

Affordable and reliable smoke alarms available in Scotland
by SIA Site Admin // July 11

Smoke alarms are an essential safety feature in any home, offering protection for you and your family in the event of a fire. In the UK, there are various affordable and reliable options available, catering to different home setups and preferences. Investing in a cost-effective smoke alarm should not compromise on the quality and effectiveness of the device, as it plays a crucial role in ensuring the safety of your living space.

Among the numerous options on the market, some well-regarded smoke alarms include the FireAngel ST-622Q and the Kidde 10Y29. These devices offer long battery life, easy installation, and reliable performance. When selecting the most suitable smoke alarm model, it’s important to consider factors such as the type of alarm, the battery life, and the ease of maintenance.

In addition to choosing the right smoke alarm for your home, it’s essential to follow proper installation and maintenance guidelines. This includes regular testing and keeping the alarm free of dust, which can hinder its performance. By ensuring that your chosen smoke alarm is correctly installed and maintained, you can effectively reduce the risk of fire-related incidents in your household and potentially save lives.

Types of Smoke Alarms

There are various types of smoke alarms available in the UK, suited for different types of fires and environments. It is crucial to understand their functionalities to choose the appropriate alarm for your home. This section briefly covers four common types of alarms: Ionisation Alarms, Optical Alarms, Heat Alarms, and Carbon Monoxide Alarms.

Ionisation Alarms

Ionisation alarms are the most affordable type of smoke alarm available. These alarms use a small radioactive source to generate a current within the device. When smoke particles enter the alarm, the current changes, and if the smoke level reaches a defined threshold, the alarm will sound. Ionisation alarms are especially sensitive to small particles of smoke produced by fast-flaming fires, such as those caused by paper or wood.

Optical Alarms

Optical alarms, also known as photoelectric alarms, utilise an infrared beam to detect smoke. When smoke is present, it scatters the infrared light, causing it to hit a sensor and trigger the alarm. Optical alarms are particularly effective at detecting slow-burning, smouldering fires with large particles of smoke, like those originating from upholstery or electrical wiring. Though generally more expensive than ionisation alarms, optical alarms are less prone to false alarms caused by cooking fumes or steam.

Heat Alarms

Heat alarms detect rapid rises in temperature instead of smoke. These alarms use a thermistor, which measures changes in electrical resistance due to heat. They are ideal for kitchens or garages where smoke alarms could be easily triggered by cooking or exhaust fumes. Heat alarms are generally considered less sensitive than smoke alarms and should not be relied upon as a sole means of fire detection.

Carbon Monoxide Alarms

As the name suggests, carbon monoxide alarms are designed to detect carbon monoxide (CO), a poisonous gas produced by incomplete combustion. CO alarms are crucial for homes with gas appliances, wood-burning stoves, or fireplaces. These alarms typically use electrochemical sensors to measure CO levels in the air. Although not designed specifically for fire detection, having a carbon monoxide alarm alongside smoke and heat alarms provides additional protection for your home and family.

Best Affordable Smoke Alarm Brands


FireAngel is a reputable brand known for producing high-quality and affordable smoke alarms. One of their best-selling products is the FireAngel Optical Smoke Alarm with 10 Year Sealed For Life Battery. This smoke alarm is easy to install and comes with a long-lasting battery that requires no maintenance. The device utilises advanced optical sensing technology for quick and accurate detection of fires, making it a reliable choice for any household.

Kidde 29HD

Kidde is another well-respected brand offering affordable smoke alarms, such as the Kidde 29HD. This budget-friendly option features a test and hush button, allowing you to easily test and silence the alarm. With a 6-year warranty and easy installation process, the Kidde 29HD is a great value for those looking for a reliable and affordable smoke alarm. The device is capable of detecting both smouldering and flaming fires, providing comprehensive protection for your home.

Nest Protect

Nest Protect is a more advanced smoke alarm option with smart features. Although slightly more expensive than other options, the Nest Protect offers excellent value due to its additional features. This smoke alarm connects to your Wi-Fi and sends alerts to your phone when smoke is detected, allowing you to monitor your home remotely. It also has a built-in carbon monoxide detector, providing all-in-one protection. With its sleek design, user-friendly app, and voice alerts, Nest Protect is an excellent choice for those who want a comprehensive and connected smoke alarm solution.

Smart Smoke Alarms

Smart smoke alarms provide enhanced safety features and convenience compared to traditional smoke detectors. In this section, we will discuss various types of smart smoke alarms available in the UK, including interlinked alarms, wireless alarms, and Wi-Fi alarms.

Interlinked Alarms

Interlinked smoke alarms are a popular choice for homeowners who want to ensure maximum protection. These alarms are connected to each other, so if one alarm detects smoke, all the other alarms in the system will sound simultaneously. This ensures that everyone in the house is alerted to a potential fire hazard. Affordable and reliable interlinked smoke alarms can be found from brands like Nest Protect and FireAngel.

Wireless Alarms

Wireless smoke alarms offer more flexibility when it comes to installation, as they don’t require any wiring between devices. This means they can be easily added to an existing alarm system or installed in a new property without the need for professional help. Wireless alarms can also be connected to other devices within your home, such as smart lighting or security systems, providing additional safety measures.

Wi-Fi Alarms

Wi-Fi enabled smart smoke alarms allow you to monitor the status of your alarms remotely using a smartphone or other compatible devices. This can be particularly useful if you’re away from home and want to know if an alarm has been triggered. Brands like Google Nest Protect offer Wi-Fi enabled smoke alarms that provide real-time updates and give you the ability to silence false alarms directly from your phone.

In summary, smart smoke alarms provide a range of advanced features, including interlinked, wireless, and Wi-Fi capabilities, to ensure increased safety and convenience for homeowners. By choosing a reliable and affordable option, you can protect your home and loved ones more efficiently.

Smoke Alarm Placement


In the kitchen, it is essential to install a heat alarm rather than a smoke alarm to minimise false alarms caused by cooking fumes. Position the heat alarm a maximum of 150mm vertically down from the apex on the slope. Also, make sure it is at least 30 centimetres away from cooking appliances to avoid accidental triggering.

Escape Routes

For escape routes, such as hallways and landings, place smoke alarms in all circulation areas to ensure maximum coverage. You should have at least one smoke alarm in every circulation space on each storey. Installing alarms in these areas gives occupants enough time to exit the property in case of a fire. As a best practice, position them on the ceiling, ideally in the centre, and a minimum of 300mm away from walls or light fittings.

Sleeping Areas

In sleeping areas, it’s crucial to have smoke alarms installed to quickly alert you to a fire while you sleep. Put a smoke alarm in every bedroom or just outside the entrance to the sleeping area. Additionally, it’s important to place a smoke alarm targeting the principal habitable room (usually the living room) as a precaution. Ensure that the smoke alarm is not blocked by furniture or curtains, which could prevent its proper functioning. Test these alarms frequently and keep them well maintained for optimal performance.

Legal Requirements for Landlords

In the UK, landlords are legally required to ensure the safety of their tenants by providing working smoke and carbon monoxide alarms in their properties. The Smoke and Carbon Monoxide Alarm (England) Regulations 2015 provide clear guidance for landlords in the private rented sector.

At least one smoke alarm must be installed on every storey of the property used as living accommodation. Although the regulations do not specify the type of smoke alarm required, alarms can be either mains powered (‘hard-wired’) or battery powered. It is advised that landlords refer to their local council’s recommendations regarding the most suitable alarm type for their property.

Carbon monoxide alarms are required in rooms with a solid fuel heating appliance, such as a coal fire or wood-burning stove. However, it is strongly recommended that landlords install carbon monoxide alarms in all rooms containing gas appliances, as the risk of carbon monoxide poisoning can still be present.

As a landlord, you are responsible for ensuring that the alarms are in working order at the start of each new tenancy. Tenants should then take responsibility for regularly checking their alarms, replacing batteries, and notifying the landlord of any faults.

From 1 October 2022, the legislation will be amended to extend the requirements for smoke and carbon monoxide alarms in the social rented sector, thereby aligning them with the private rented sector. This change will make it mandatory for social housing landlords to fit smoke and carbon monoxide detectors as well, as explained by the NRLA.

Fire Safety Tips

Practising proper fire safety is crucial to protect yourself, your loved ones, and your property. Here are some essential tips to keep in mind:

  • Install smoke alarms in every level of your home, especially in rooms where fires are more likely to occur, such as the kitchen and bedrooms. The alarms should be positioned high up on the walls or ceiling, ensuring they can detect smoke early and alert the household to a potential fire.

  • Test your smoke alarms regularly, and replace the batteries at least once a year. A well-maintained smoke alarm can significantly increase your chances of escaping a fire unharmed.

  • Keep a fire blanket and a fire extinguisher at hand in the kitchen, as most household fires start there. Make sure you know how to use them correctly.

  • Plan and practice a fire escape route with all the members of your household. Identify two exits from each room, and make sure they remain clear and accessible at all times.

  • Do not overload electrical outlets or use damaged electrical equipment. Replacing faulty wirings and using the right type of circuit breakers can greatly reduce the risk of electrical fires.

  • Since our lives often revolve around the use of mobile devices, consider installing a fire safety Android app on your smartphone or tablet. Fire safety apps can provide valuable information and tips to help prevent and respond to fires. Some apps even allow you to get real-time alerts, ensuring you can act quickly in case of an emergency.

By following these fire safety tips and making use of the available resources, such as educational apps and up-to-date smoke alarms, you can greatly reduce the risk of fires and protect your home and loved ones. Stay vigilant, stay informed, and stay safe.

Choosing the Right Alarm

When looking for an affordable smoke alarm in the UK, there are a few important factors to consider before making your purchase. These factors will help ensure that the smoke alarm you choose will provide the necessary protection for your home without breaking the bank

Types of Smoke Alarms: There are three main types of smoke alarms: ionisation, optical (photoelectric), and combined alarms. Ionisation alarms detect fast-flaming fires, while optical alarms are more sensitive to slow-burning, smouldering fires. Combined alarms utilise both technologies to offer maximum coverage. It is essential to select the type that best suits your needs and the potential fire hazards in your home.

Interlinked Alarms: Interlinked smoke alarms are connected together, so when one alarm detects smoke, all the alarms in the property sound simultaneously. This feature ensures that everyone in the house is alerted promptly, giving them more time to respond. Although they might cost slightly more than unlinked alarms, they are still affordable and crucial in providing comprehensive safety. The Evening Standard has suggested some of the best smoke alarms to buy in the UK in 2023.

Power Source: Smoke alarms can be powered by batteries, mains electricity, or a combination of both. While battery-powered alarms are cheaper and easier to install, they require more frequent monitoring and battery replacements. Mains-powered alarms, on the other hand, are more reliable but need professional installation. Consider the pros and cons of each option when making your decision.

Ease of Installation and Maintenance: Choose a smoke alarm that is easy to install and maintain. This will save you time and reduce any potential stress associated with this process. Look for models with clear instructions and readily available replacement parts.

Certification and Testing: When purchasing a smoke alarm, ensure it has been tested and certified by reputable organisations. In the UK, look for smoke alarms that carry the British Standard (BS) or European Union (EU) certification marks, as this guarantees that the alarm meets the required safety standards. Also, check for Which? Best Buy recommendations to select a reliable alarm.

By considering these factors when selecting an affordable smoke alarm in the UK, you can be confident that you are making a well-informed and cost-effective decision, ensuring the safety of your home and family.

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Frequently Asked Questions

What is the cost range of smoke alarms in the UK?

The cost of smoke alarms in the UK can vary depending on the type and features. Generally, battery-powered smoke alarms can be found for as little as £5, while mains-powered (hardwired) alarms or combined smoke and carbon monoxide detectors can range from £20 to over £50.

Where can I obtain free smoke alarms in the UK?

Some local fire and rescue services in the UK may offer free smoke alarms as part of their home fire safety initiatives. It’s recommended to contact your local fire service to check if they provide this service. Additionally, certain charities or community organisations may also offer free smoke alarms to vulnerable individuals or families.

How many smoke alarms are recommended for a 3-bedroom flat?

According to the GOV.UK fire safety guidelines, it is advised to have at least one smoke alarm on every level of your home. For a 3-bedroom flat, it’s recommended to have a smoke alarm in the hallway and one in each bedroom. So, a minimum of four smoke alarms is suggested.

What is the installation cost for hardwired smoke detectors in the UK?

The installation cost for hardwired smoke detectors in the UK varies depending on factors such as the electrician’s fees and the number of detectors. Generally, the installation cost ranges from £100 to £300. It is advisable to obtain quotes from multiple electricians to compare prices and services.

What are the top-rated smoke and carbon monoxide alarms available in the UK?

Some top-rated smoke and carbon monoxide alarms available in the UK include the Nest Protect, Kidde 10-Year Combination Smoke and Carbon Monoxide Alarm, and the Aico Ei3028. These devices combine reliable smoke and CO detection, providing increased safety for your home.

Where can I find reliable smoke alarm reviews in the UK?

Reliable smoke alarm reviews can be found on reputable websites like Which?, Trusted Reviews, and consumer feedback on retail websites such as Amazon or Argos. Reading these reviews can help you make a well-informed decision when choosing the best smoke alarm for your needs.