In brief – Smoke Alarms will alarm when smoke is detected by the sensors within the unit whereas Heat Alarms will alarm when they detect a rapid rise in temperature in the atmosphere around the device. Heat Alarms have been specifically designed for areas with fumes and high humidity e.g. kitchens where cooking fumes are present and attics or garages where there is lots of dust and usually high humidity.

Over 50% of fires start in kitchens in domestic properties – installing a heat alarm in this room will mean you’re rapidly alerted to danger.


No – for Carbon Monoxide detection you need to also install a CO detector which you will find here, or a combination smoke and CO alarm – FireAngel SCB10.

No – the ST-620 has not been designed to be installed in a kitchen as it will react to cooking fumes. For fire detection in your kitchen fit a FireAngel Heat Alarm.

Yes – you can hardwire interlink this alarm with other SW1 smoke alarms and HW1 heat alarms to offer protection across the home (12 devices in total).

Yes – you can hardwire interlink this alarm with other ST-230 smoke alarms and HT-230 heat alarms to offer protection across the home (12 devices in total).

The ST-620, ST-622 and ST-750 range of alarms will all fit onto the same base plate.

A crackling alarm is a sign that there has been moisture within the unit that may have caused a corrosion build up. A crackling alarm will still function correctly and alert you to smoke providing it is testing correctly. We advise to test alarms weekly. If you are experiencing issues with a crackling alarm, our Technical Support Team will be happy to help, you can reach them here.

The internal power pack of the alarm will not activate until the unit has been correctly installed onto its base plate.

You can find out more information on why FireAngel have moved away from Ionisation alarms here – https://www.fireangel.co.uk/blog/why-fireangel-is-moving-away-from-ionisation-alarms

Make sure the alarm is correctly located on the base plate and ensure the mains power supply is on. If there is still no connection, inspect the circuit breaker or fuse in the power circuit to the alarm. Failing this, call a qualified electrician to inspect the house wiring and connection.

The RF modules purpose is to interlink your units with each other wirelessly. If the module is removed the alarm will be unable to send a signal to any other unit within the network and therefore the interlink feature will not work.

You would need to contact your local Fire and Rescue Service to discuss eligibility criteria for a Safe and Well check.

Ionisation smoke alarms are more responsive to smoke with smaller particles such as those found in fast flaming fires whereas optical alarms are more responsive to the dense smoke found in slow smouldering fires.

The best smoke alarm to buy depends on your needs – do you require a mains-powered alarm or battery-powered? Do you want to replace the batteries in your alarm or do you want to fit the alarm and enjoy a decade of peace without having to change the batteries?

FireAngel have smoke alarms to suit all of your needs, and if you need support on deciding which alarm is right for you, our Customer Service Team can support.

The best longlife smoke alarm for you depends on your requirements. If you need a battery-powered smoke alarm then look for a 10 year sealed for life battery unit like the FireAngel. If you require a mains powered smoke alarm with long life look for an alarm with a 10 year sealed for life back-up battery model like the FireAngel…

When your smoke alarm is activated it will emit an alarm sound of 3 loud beeps and a break repeated.

You need to look for a smoke alarm with a 10-year battery sealed within the unit. FireAngel have multiple products with sealed batteries in.

Alternatively, you can install a mains powered alarm with a 10 year sealed back up battery within the unit.

Thermoptek technology combines the very latest in optical sensing with a thermal enhancement – it has two separate sensing elements. The different sensing elements constantly monitor for two different by-products for fires (smoke and temperature). If a rate of temperature rise is detected the sensitivity of the smoke alarm is increased. This provides a quicker response time to all fire types; fast flaming and slow-burning fires.

FireAngel Thermistek technology is found in many of our heat alarms and combines a patented radiant heat dish, high-performance Class A1 thermistor and a predictive monitor algorithm in order to provide a quicker response to danger.

When compared to traditional heat alarms Thermistek technology reduces the reaction window by half – meaning you and your family have vital extra time to react.

If your alarm is functioning correctly, when you press the test button you will hear a cycle of 3 loud beeps and a break then another 3 beeps. This signals that the unit is working correctly.

Most commonly, the Fire Service fit standalone battery units. They also fit hard of hearing systems, these systems include the vibrating pad and strobe unit alongside wirelessly interlinked smoke alarms.

FireAngel Smoke alarms have a thermoptek sensor. Thermoptek sensors combine the very latest in optical sensing technology with a thermal enhancement. The combination of Optical sensing technology with thermal enhancement means the smoke alarm monitors temperature as well as smoke – this is multi-sensor technology.

We recommend that your smoke alarms are cleaned at least every three months. Using the brush attachment on your vacuum run over the grates on the sides of the alarms to remove any built-up dust or insects.

Do not clean the alarm with any cleaning products and do not paint the units.

Test your alarms weekly and replace after 10 years to ensure the smoke alarm can protect you and your home.

Low temperatures can cause battery levels to dip. It is likely that the power pack in your alarm is running low, and when the temperature drops in the night the level of battery power in the alarms’ battery pack drops below the set threshold which causes the alarm to chirp. It is advisable to arrange a replacement for a unit which chirps. If your unit is still within its warranty period you can contact our Technical Support Team for a replacement.

Ensure the battery is installed in the unit before attempting to attach it to the base plate. Once the battery is installed, push and twist the alarm (clockwise) to attach it. If you are still having problems attaching the unit to the base after following these steps, please contact our Technical Support Team.

If your Mains Powered alarm is false alarming, there could be several reasons why. Most commonly, there will be something contaminating the sensor within the unit such as an insect or dust particles. If this is the case then following our troubleshooting tips and cleaning the unit with your vacuum cleaner should resolve the issue. If cleaning the unit does not resolve a false alarm, there may be other causes. Please contact our Technical Support Team for further assistance.

A chirping Mains Powered alarm can be caused by any number of things from a low battery pack to the unit being incompatible with other alarms on the network. If you experience a chirp of any kind it is advisable to contact our Technical Support Team for assistance.

A small percentage of alarms manufactured historically were affected by a premature low battery chirp. The issue does not affect the functionality of the units and any unit affected by the premature low battery will still offer protection and work as it should while a replacement is arranged. Once the issue was identified measures were put in place to rectify the problem and any subsequent alarms should not be affected. FireAngel is committed to providing quality home safety products and our devices come with lengthy warranties for added peace of mind for our customers. If your alarm has emitted a chirping noise, please contact our Technical Support Team who are always happy to help.

Research has shown that some children can sleep through smoke alarms, this is thought to be due to the tone of the alarms themselves. However, there are ways that you can ensure your family will be safe in the event of a fire; Ensure that your family have a plan. Teaching your children, including very young ones, what to do if smoke alarms activate will prevent them from panicking in a dangerous situation. It is imperative that children have been given clear instructions and fire drills are practiced. Having the earliest possible alert to a fire is the only one way to ensure that you and your family have the best chance of survival in a house fire and it is essential that parents and children get notified of a fire immediately. The best way to achieve this is to have your smoke alarms interlinked throughout the house. If, for example, a smoke alarm activated in a child’s bedroom – all the alarms in the network would sound as well. Interlinking units gives you the maximum warning time and buys you vital time in the event of a fire.

The FireAngel Pro range alarms do not have the capability to be wirelessly interlinked to any of the 630 range. Only units part of the FireAngel Pro Connected range and the Wi-Safe 2 range are compatible with each other.

The ST-622 smoke alarm has a Thermoptek sensor. Our Thermoptek multi-sensor technology combines the very latest in optical sensing technology with thermal enhancement which ensures the sensor checks for both smoke and rapid changes to temperature. Thermoptek alarms offer rapid alerts to all fire types, both fast flaming and slow-burning and when compared to single sensor alarms Thermoptek units react to fire in under half the time.

An amber light is an indication of a fault. This could mean that your unit needs to be replaced. If you have an amber light on your unit, please contact our Technical Support Team.

FireAngel alarms are toast proof. The advanced thermoptek sensor within the unit monitors both increases in temperature and smoke making them less prone to false alarms from cooking fumes.

When alarms are interlinked they are able to communicate and will alert at the same time if one of the alarms detects danger. In the case of wireless interlink, this communication is in the form of protected radio frequency, which means there’s no need to run cables between the alarms. The FireAngel Pro Connected alarms allow the network to be extended to include devices across your entire home. For example, a network of 7 x smoke alarms, 3 x heat alarms, 3 x carbon monoxide alarms and a Gateway will be completely secure and protect your whole home, and are backwards compatible with the FireAngel Wi-Safe2 range.

You can also add a Gateway into the network which will allow you to receive updates on the network when you’re away from the home. The Gateway will communicate with the FireAngel Connected App using your home’s internet connection, but if this fails or cuts out the alarms will still protect your home, but you won’t receive a push notification.

The Thermoptek technology within our smoke alarms allows for rapid detection of all types of fires whether it be slow smouldering or fast flaming. Thermoptek technology combines the very latest in Optical Sensing with a thermal enhancement, the unit constantly monitors its environment for both smoke and heat – If a rate of temperature rise is detected the sensitivity of the alarm is increased giving you vital time to act in a smoke event.

When installed, a mains-powered alarm will usually have a constant green LED light on the front, whereas a battery-operated unit will have an intermittent red LED flash. If the units are not installed, a mains alarm will have mains connectors on the back whereas a battery-operated unit will not.

Smoke alarms from reputable companies will be CE marked and compliant to EU and British Standards. The easiest way to check this is to review the instruction leaflet or specification documents for the products.

The easiest way to check your alarm is working is by pressing the central test button on the unit. If the unit emits the test sound when you press this button, you know it is working as it should. If there was ever anything wrong with the unit that would cause it to not activate in a smoke event then you would not hear the test sound when the test button is pressed. The test sound for a smoke alarm is two cycles of 3 blasts and a break. It is important that your smoke alarms are tested weekly to ensure they are in good working order.

Most smoke alarms have a base plate which needs to be secured to the ceiling or wall which will anchor the alarm once added.

Mains powered smoke alarms require a hardwired connection into your home’s electricity supply and therefore we recommend that a professional installs these alarms.

For detailed installation instructions please refer to the user manual supplied with the product, search for the product on our site or get in touch with our Customer Service Team on 0330 094 5830.

There are a variety of Child-friendly Carbon Monoxide educational videos on Youtube. Click the link to find a favourite of ours

You can find tips on how to teach young people about Fire Safety here: https://www.fireangel.co.uk/blog/how-to-teach-young-children-about-fire-safety

It is important to treat an alarm signal as a potentially dangerous situation. If you are certain your unit has false alarmed then you can use the alarm smart silence function. In the event of a known false alarm, your unit can be temporarily silenced by pressing the central test button. Your alarm will automatically return to full sensitivity after 10 minutes. To avoid false alarms, we advise, as part of routine maintenance to clean the unit with the soft brush attachment for your vacuum cleaner regularly.

Waste electrical products should not be disposed of with your other household waste. Our alarms are ideally suited for disposal within the waste electronic and electrical equipment (WEEE) recycling scheme. It is always advisable to check with your local authority for recycling/ disposal advise as regional variations apply.

Our FireAngel Smoke Alarms have large central test buttons which can be easily pressed by a sweeping brush.

Test you smoke alarm weekly and replace after 10 years to ensure your home is protected.

The FireAngel Pro Connected product range allows you to have a mixture of mains powered and battery-powered devices in your home, and have them communicate with each other. This means that if one of the alarms detects danger, the whole network will sound and alert you to danger in unison.

It also means you can extend the protection at any time; if you want to add a smoke alarm into your child’s bedroom you can with the simple ‘learn-in’ process which will add the new device into the existing network.

You will not need an internet connection to interlink your Smoke, Heat or CO alarms with each other. This process is done using a built-in module within the unit itself.  However, if you wish to add a Pro Connected Gateway unit into your network, you will need a broadband router in the property where it is being installed. The Gateway unit will come with an ethernet cable which plugs directly into your Broadband router and into the back of the Gateway. You will then be able to download and access the FireAngel Connected App.

The majority of our battery operated Smoke alarms all have a Red LED flashing light on the front except for our new Pro Connected Smoke Alarm (FP2620W2-R) this unit does not flash the red LED light intermittently flashing.

The ST-622 alarm is a standalone unit and cannot be wirelessly interlinked with any other alarm.

FireAngel Heat alarms have a Thermistek sensor. The Thermistek sensor detects rapid temperature increases. Its reaction to heat rather than smoke makes it ideal for installation in kitchen areas and garages in order to avoid false alarms caused by cooking and vehicle fumes.

Given that over 50% of domestic fires start in the kitchen, it’s paramount that you protect this area with an alarm to be alerted to danger quickly. FireAngel has a wide range of Kitchen Heat Alarms which have been specifically designed to be installed in the kitchen, and in areas with high fumes or humidity such as the garage or attic.

Unlike smoke alarms, a Kitchen Heat Alarm detects rapid rises of temperature, which stops any false alarms to cooking fumes from burnt toast!

Heat Alarms should be installed alongside smoke alarms to provide a rapid alert to all fire types across the home.

Yes – you can hardwire interlink this alarm with other HW1 heat alarms and SW1 smoke alarms to offer protection across the home (12 devices in total).

Yes – you can hardwire interlink this alarm with other HT-230 heat alarms and ST-230 smoke alarms to offer protection across the home (12 devices in total).

If you have smoke and Carbon Monoxide alarms linked in a network it can be difficult to determine whether the danger is fire or Carbon Monoxide.

However, if the danger is smoke related the devices will be sounding the alarm in a three beep pattern – ‘beep beep beep’. If the danger is Carbon Monoxide related the devices will be sounding the alarm in a four beep pattern – ‘beep beep beep beep’.

Mains powered alarms are ‘hard-wired’ into your home’s 230V electricity circuit, so will have a power cable wired into the unit and require a professional installation. FireAngel’s mains alarms contain a back-up battery which will continue to protect the home if the mains power is cut or if there is an outage. Did you know – if you’re renovating a home in England you’re required to install mains powered smoke alarms during the process?

Battery-powered alarms come either with batteries which you can replace or batteries that are sealed within the unit and will last the lifetime of the device. If you want to fit and forget, look for a 10 year battery alarm that will offer you complete protection for a decade.

When alarms are interlinked they will all mirror the alert of the device which detects the danger or requires attention. When all of the alarms are alerting you can press the central test button on any of the alarms in the system to silence all alarms, except the alarm which has detected danger or needs further investigation.

In a network containing both smoke/kitchen heat alarms and carbon monoxide alarms, the alert style will tell you whether the danger is fire or carbon monoxide related. For smoke/fire detection the system will alarm with three beeps (beep – beep – beep) and if Carbon Monoxide is detected there will be four beeps (beep – beep – beep – beep).

If a Gateway is added to the network you can also check any push notifications or The App dashboard to see which device requires your attention.

You should fit a FireAngel alarm with Thermoptek technology and smoke alarm – found here.

Yes – heat alarms and smoke alarms detect fire in very different ways. Smoke alarms, as the name suggests, alert you to fires by detecting smoke, so if there’s a slow smouldering fire (which usually doesn’t give off a lot of heat) it could be missed for some time if a you only have a heat alarm installed. We would recommend you review the regulations specific to your area, but as a guide we recommend that homes have a smoke alarm in the hallway, landing and in the room most used in the daytime, alongside a heat alarm in the kitchen.

A Heat Alarm is perfect for detecting fires like those caused by faulty white goods, as they usually create a ‘blast’ of fire that’s very hot. Heat Alarms won’t false alarm to a dusty or humid room which makes it perfect for kitchens, utility rooms and garages where these items are usually found.

Yes – Heat Alarms won’t false alarm to dusty or humid rooms which makes them perfect for kitchens, utility rooms and garages.

You can install a heat alarm as it won’t false alarm to a dusty or humid rooms which makes it perfect for kitchens, utility rooms and garages where these items are usually found.

If your alarm is activating and there is no smoke present, it is likely that the sensor within the unit has been contaminated – usually by an insect or dust particles. To rectify this, simply take the soft brush attachment for your vacuum cleaner and clean around the perimeter of the alarm, this should dislodge anything that may be contaminating the sensor and rectify the false alarm. If cleaning your alarm does not resolve the issue, please contact our technical support team on 0800 141 25 61 or via email at technicalsupport@fireangeltech.com

We don’t recommend installing a smoke alarm in a kitchen as the high humidity and cooking fumes will cause the alarm to regularly false alarm.

Instead we would advise that a Kitchen Heat Alarm is installed. These alarms have been specifically designed to be installed in kitchens, attics and garages and will react to rapid changes in temperature, rather than to smoke or fumes in the air around them.

Install Kitchen Heat Alarms alongside Smoke Alarms to provide a rapid alert to all fire types across the home.