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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 - Firehawk BB Series

These Firehawk mains-powered smoke and heat alarms with hardwire interlink and replaceable AAA alkaline back-up batteries are suitable for Grade D2 systems to warn all occupants of a fire.

  • 230V mains power with alkaline battery backup
  • 6 years manufacturer's warranty
  • Hardwire interlink up to 15 Firehawk FHN smoke and heat alarms.
  • Also suitable for the 2022 Scottish legislation

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5 out of 5 stars

From: £17.63 inc VAT

£14.69 ex VAT

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Mains Powered 2 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Batteries - Firehawk

  • Power: 230V mains powered with alkaline back-up battery
  • Back-up Battery: 3 x AAA alkaline batteries (included)
  • Warranty: 6 year manufacturer's warranty
  • Hardwire interlink with up to 12 Firehawk FHN devices in total
  • Suitable for BS 5839-6: 2019 Grade D2 installations
  • Also suitable for both the Welsh and Scottish 2022 legislation
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5 out of 5 stars

Save 8%

Now: £48.19 inc VAT

£40.16 ex VAT

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Mains Powered 3 Smoke Alarms and 1 Heat Alarm Kit with Alkaline Back-up Batteries - Firehawk

  • Power: 230V mains powered with alkaline back-up battery
  • Back-up Battery: 3 x AAA alkaline batteries (included)
  • Warranty: 6 year manufacturer's warranty
  • Hardwire interlink with up to 12 Firehawk FHN devices in total
  • 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

Save 8%

Now: £63.89 inc VAT

£53.24 ex VAT

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Mains Powered Smoke Alarms & Heat Alarms with Self-Charging 10 Year Back-up Battery - Firehawk RB Series

With self-charging back-up batteries, these mains-powered smoke and heat alarms from Firehawk won't need new batteries for their full 10 year lifespan. Ideal for Grade D1 and Scottish installations.

  • 230V mains power with self-charging lithium battery backup
  • 10 years manufacturer's warranty
  • Hardwire interlink up to 15 Firehawk smoke and heat alarms.
  • Also suitable for the 2022 Scottish legislation

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4.7 out of 5 stars

From: £29.99 inc VAT

£24.99 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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