Basket (0)

Checkout

FREEPHONE 0800 612 6537 Now FREE from UK mobiles

Mains Powered Heat Alarm with Lithium Back-up Battery - BRK 790MRL

This product is temporarily unavailable


This product has been temporarily discontinued. Please see our alternative products.

Product Overview

The BRK 790MRL mains powered heat alarm with re-chargeable 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 interconnected (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.

  • 230V mains powered heat alarm
  • Re-chargeable lithium back to battery - no need to replace for the life of the alarm
  • CE marked and Kitemarked to BS 5446-2
  • 5 year manufacturer's warranty
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • 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 interconnected (via cable)
  • An interlinked system provides the earliest warning of fire
  • Test button facility
  • Easy to install push-fit base plate
Interconnection

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

Alarms from the Same Series

Model Number Type of unit Type of interconnection
770MRL Ionisation Smoke Alarm Hard wire interconnect
760MRL Optical Smoke Alarm Hard wire interconnect
790MRL Heat Alarm Hard wire interconnect
Technical Data

This is the technical data for the Mains Powered Heat Alarm with Lithium Back-up Battery - BRK 790MRL.

Product Code BK790MRL
Weight 0.34kg
Dimensions (HxDia) 68x140mm
Sound Output 85dB at 3m
Back-Up Battery Sealed long life lithium
Operating Temperature +5 C to +38 C
Relative Humidity 10% to 85%

Data Sheets

FAQs (14)

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 smoke alarms last before needing replacement?

A. It is recommended that smoke alarms are replaced after 10 years. This is because the sensors in the smoke alarms become less sensitive and may not activate when a fire is present.

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.

Q. What sort of smoke alarm system would I need to install for a HMO?

A. BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

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 than can original from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than what an ionisation would do 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.

Show all FAQs

Looking for more information?

If you have any questions or would like more information about this product you can ask one of our specialists.

Live Chat Available Now
Direct Telephone 01507 464181
Direct Email Email Now