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Mains Smoke Alarms

New residential buildings, conversions, HMOs and some small businesses require mains powered interlinked smoke alarms. Our 230V smoke detectors and heat alarms (with wire interlink or radio interlink between units) from leading brands like Kidde, Firehawk and AICO fulfill the requirements of BS 5839 Part 6.

Most existing properties will need Grade D alarms according to previous Building Regulations, but all mains-powered alarms sold by Safelincs also satisfy Grades D1 & D2 from the new 2019 revision. Please see our guide to BS 5839-6: 2019 for more information on Grades of alarm.

Mains Powered Smoke Alarms & Heat Alarms with Alkaline Back-up Battery - FireAngel W1-R Series

  • Power: 230V mains powered with battery back-up
  • Backup Battery: 9V alkaline battery (included)
  • Warranty: 1 year warranty
  • Available in Optical and Heat versions
  • Interlinks with up to 12 units
  • Kitemarked, CE marked and suitable for BS 5839-6: 2019 Grade D2
  • Please note: alarms are sold individually
  • Also suitable for the 2022 Scottish legislation
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4.8 out of 5 stars

From: £19.67 inc VAT

£16.39 ex VAT

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Mains Radio-Interlink Smoke Alarms & Heat Alarms with Sealed Longlife Back-up Battery - FireAngel Pro Connected Series

  • Power: 230V mains powered with sealed longlife back-up battery
  • Available in Optical and Heat versions (FP1640W2-R and FP1740W2-R)
  • Interlinks via radio frequency with up to 50 units
  • Kitemarked, CE marked and suitable for BS 5839-6: 2019 Grade D1 installations
  • Compatible with the FireAngel Pro Connected Gateway
  • Please note: alarms are sold individually
  • Also suitable for the 2022 Scottish legislation
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5 out of 5 stars

£75.59 inc VAT

£62.99 ex VAT

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Mains Powered Smoke Alarms & Heat Alarms with Sealed Longlife Back-up Battery - FireAngel Pro 230 Series

  • 230V mains powered with lifetime lithium battery – never needs replacing!
  • Available in Optical and Heat versions (ST-230, HT-230)
  • Interlinks with up to 30 units
  • Kitemarked, CE marked and suitable for BS 5839-6: 2019 Grade D1 installations
  • Please note: Alarms are sold individually
  • Also suitable for the 2022 Scottish legislation
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Mains Smoke Alarms

Mains Smoke Alarms

Mains smoke alarms or mains powered smoke alarms are supplied with 230V from the mains wiring of a building. They can be wired into a special alarm wiring loop coming directly from the fusebox or they can be fed from the nearest light fitting. Supply from the light fitting is recommended and cheaper. However, care must be taken that the supply is not wired incorrectly and the smoke alarm is by mistake supplied by a 'switched' electric cable, otherwise low battery warnings might ensue. Mains smoke alarms with a form of interlink (wire interlink between units or radio-interlink) fulfil BS5839 part 6 grade D required for extensions, new domestic buildings, let homes, HMOs and many more applications.
Back-Up Batteries

Back-Up Batteries

All our mains powered smoke detectors and heat alarms have back-up batteries. This ensures that the smoke alarms are still working even if the mains power fails. These back-up batteries are either non-rechargeable (eg alkaline batteries), in which case they need replacing every year or two, or they contain sealed-in re-chargeable lithium back-up batteries which are re-charged with a trickle charge. Sealed-in batteries cannot be replaced at the end of their lifespan which is usually ten years.

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