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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 - Kidde Firex KF Series

  • 230V mains powered with alkaline back-up battery
  • Available in Optical and Heat versions
  • Interlink with up to 24 units
  • Suitable for BS 5839-6: 2019 Grade D2 installations
  • Kitemarked and CE marked
  • Please note: alarms are sold individually
  • Also suitable for both the Welsh and Scottish 2022 legislation
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4.8 out of 5 stars

From: £21.00 inc VAT

£17.50 ex VAT

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Mains Powered 3 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Battery - Kidde Firex KF Series

  • Power: 230V mains powered with alkaline back-up battery
  • Back-up Battery: 9V alkaline battery (included)
  • Warranty: 6 year warranty
  • Hardwire interlink with up to 24 devices
  • Suitable for BS 5839-6: 2019 Grade D2 installations
  • Also suitable for both the Welsh and Scottish 2022 legislation
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4.7 out of 5 stars

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£72.99 ex VAT

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Mains Powered Smoke Alarms & Heat Alarms with Self-Charging 10 Year Back-up Battery - Kidde Firex KF-R Series

  • 230V mains powered with self-charging lithium back-up battery
  • Available in Optical and Heat versions
  • Interlinks with up to 24 units
  • Suitable for BS 5839-6: 2013 Grade D1installations
  • Kitemarked and CE marked
  • Also suitable for both the Welsh and Scottish 2022 legislation
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4.6 out of 5 stars

From: £46.79 inc VAT

£38.99 ex VAT

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Mains Powered 2 Smoke Alarms and 1 Heat Alarm Kit with Self-Charging 10 Year Back-up Battery - Kidde Firex KF-R Series

  • Power: 230V mains powered with self-charging lithium back-up battery
  • Back-up Battery: Self-charging 10 year back-up battery
  • Warranty: 6 year warranty
  • Hardwire interlink up to 24 compatible devices
  • Suitable for BS 5839-6: 2019 Grade D1 installations
  • Also suitable for both the Welsh and Scottish 2022 legislation
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4.3 out of 5 stars

Save £14.14

Now: £127.43 inc VAT

£106.19 ex VAT

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Mains Powered 3 Smoke Alarms and 1 Heat Alarm Kit with Self-Charging 10 Year Back-up Battery - Kidde Firex KF-R Series

  • Power: 230V mains powered with self-charging lithium back-up battery
  • Back-up Battery: Self-charging 10 year back-up battery
  • Warranty: 6 year warranty
  • Hardwire interlink up to 24 compatible devices
  • Suitable for BS 5839-6: 2019 Grade D1 installations
  • Also suitable for both the Welsh and Scottish 2022 legislation
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5 out of 5 stars

Save £17.72

Now: £170.63 inc VAT

£142.19 ex VAT

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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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