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Mains Powered Heat Alarm with Self-Charging 10 Year Back-up Battery - BRK 790MRL

Discontinued Product

This product has been discontinued and is no longer available to buy.

alternative product

Mains Powered Heat Alarm - BRK 690MBX

  • Power: 230V mains powered with back-up battery
  • Backup Battery: 9V alkaline battery (included)
  • Warranty: 5 year manufacturer's warranty
  • Test button facility
  • Interlinks with up to 12 alarms
  • Suitable for BS 5839-6: 2019 Grade D2
  • Kitemarked to BS 5446-2
  • Also suitable for the 2022 Scottish legislation

£28.79 inc VAT

£23.99 ex VAT

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Product Overview

The BRK 790MRL (also known as 690MRL) mains powered heat alarm with self-charging lithium back-up battery is Kitemarked to the latest British Standards and has a 5 year manufacturer's warranty. Up to 12 smoke and heat alarms from the BRK 700MRL series can be interlinked (via cable) within a single system, allowing all alarms to activate if one is triggered by fire. The 790MRL is suitable for installing in kitchen areas and garages.

  • Power: 230V mains powered with lifetime back-up battery
  • Backup Battery: Self-charging lithium battery lasts the lifetime of your alarm - GUARANTEED
  • Warranty: 5 year warranty
  • Please note that BRK and First Alert are no longer manufacturing new stock for the European Market and while the products may have a 2018/19 manufacturing date they still provide a full 10 year lifespan and full warranty cover from date of purchase
  • CE marked and Kitemarked to BS 5446-2: 2003
  • Suitable for installations complying to BS 5839-6: 2019 Grade D1
  • Detects increases in room temperature
  • Ideal for kitchens and garages where a smoke alarm would be unsuitable
  • A maximum of 12 alarms from the 700MRL series can be interlinked (via cable)
  • An interlinked system provides the earliest warning of fire
  • Test button facility
  • Easy to install push-fit base plate
  • Product warranty and life commences from date of purchase
  • This alarm is also suitable for the updated 2022 Scottish legislation for fire alarms in homes

Please note: this product is not a direct upgrade from the 690MBX heat alarm. Upgrading from a BRK 600MBX series alarm featuring an alkaline battery and twist-on base may require rewiring by a qualified electrician.

Interlink

The table below shows all the units that can interlink with the BRK mains powered smoke and heat alarms.

Alarms from the Same Series

Model Number Type of unit Type of interlink
770MRL Ionisation Smoke Alarm Hard wire interlink
760MRL Optical Smoke Alarm Hard wire interlink
790MRL Heat Alarm Hard wire interlink
Technical Data
Product Code BK790MRL
Alternative Product Codes BK790, 790, 790MRL, BK790MRL
Brand BRK
Back-Up Battery

Self-charging Lithium Battery

Dimensions (HxDia)

68x140mm

Operating Temperature

+5°C to +38°C

Relative Humidity

10% to 85%

Sound Output

85dB

Warranty

5 Years

Weight 0.34kg
Product Datasheets
FAQs (14)
Q. What smoke alarm should I use in a bedroom with an en suite bathroom?
A.

It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.

Q. How do I safely dispose of my old smoke alarms?
A.

Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit www.recycle-more.co.uk.

Q. Can the mains powered smoke alarm range be connected to mains power via the lighting circuit?
A.

Yes, hard-wired mains powered alarms can be wired to the unswitched live feed of the nearest frequently used lighting circuit.

Q. is there a different alarm sound for optical and heat sensors to tell you the difference in what kind of fire it is?
A.

There is only one alarm sound type when a fire is detected, when interconnected all smoke and heat alarms will sound. However only the triggered alarm will have a rapidly flashing red indicator.

Q. How long do the batteries last in smoke alarms?
A.

The 9V alkaline batteries last 12-18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.



Please Note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

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