Replacement Smoke and Heat Alarms

Upgrading discontinued models ensures continued protection with modern technology. Many older alarm systems can be replaced with contemporary units offering improved features and maintaining existing installation infrastructure.

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Discontinued Model Challenges

Obsolete alarms leave properties vulnerable when replacement parts become unavailable. Sensors deteriorate over time, reducing detection effectiveness even when units appear functional.

Spare parts for older systems often cost more than complete new installations. Manufacturers typically cease component production several years after discontinuing alarm models.

Technology improvements in newer models provide enhanced protection compared to legacy systems. Modern sensors offer better discrimination between genuine threats and false alarm triggers.

Building standards evolve, sometimes requiring upgrades to meet current safety requirements. Older installations may not comply with updated regulations affecting insurance coverage or property transactions.

Kidde Firex Compatibility

Popular Firex models have direct replacement options that use existing wiring and mounting systems. These compatibility programmes allow cost-effective upgrades without extensive electrical modifications.

Interconnection compatibility ensures all alarms continue working together during phased replacement programmes. Mixed installations of old and new units maintain network integrity throughout transition periods.

Upgrade Benefits

Modern replacement alarms incorporate advanced features unavailable in older models. Improved false alarm resistance, enhanced sensitivity, and longer operational life provide superior protection.

Extended warranties offer improved reliability assurance compared to legacy products. Manufacturers provide comprehensive coverage reflecting confidence in contemporary design and manufacturing quality.

Sealed battery options eliminate ongoing maintenance requirements and provide decade-long operation. These systems reduce total ownership costs and improve protection consistency.

Professional Services

Our eplacement programme identifies suitable upgrades for discontinued models. Technical specialists match existing installations with appropriate contemporary alternatives.

System testing validates proper operation after replacement installation. Comprehensive checks confirm all detection, alarm, and interconnection functions operate according to specifications.

Disposal services handle end-of-life equipment responsibly, including proper recycling of electronic components and safe handling of any radioactive materials from ionisation detectors.

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Front view of a replacement mains powered smoke alarm showing its round white casing and brand logo

Replacement for Kidde KF10 Mains Powered Smoke Alarms

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  • Power: 230V mains with back-up battery
  • Back-up Battery: 9V alkaline back-up battery (included)
  • Warranty: 6 year warranty
  • Fully compatible replacement for Kidde KF10 ionisation smoke alarms
  • Fits onto your existing KF10 alarm base – no need for an electrician
  • Optical sensor technology with improved smoke detection
  • Kitemarked to BS EN 14604: 2005
4.8 out of 5 stars
£21.00 inc VAT

£20.80 inc VAT

£17.33 ex VAT

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Free Delivery
Replacement for fireangel si 610 10 year smoke alarm ultrafire ulls10 shown with swap image and arrows indicating installation steps

Replacement for FireAngel SI-610 10 Year Smoke Alarm - Firehawk FHB10

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  • Easily replace FireAngel SI-610 alarm with Firehawk FHB10
  • Adaptor plate simply twists onto existing baseplate
  • Battery: 10 year sealed lithium battery
  • Warranty: 10 year manufacturer's warranty
  • Combined test and silence button
  • Suitable for BS 5839-6: 2019 Grade F1 installations
  • CE and Kitemarked to BS EN 14604: 2005
Customer Reviews
£16.78 inc VAT

£15.48 inc VAT

£12.90 ex VAT

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Free Delivery
Replacement for FireAngel SO 601 9v optical smoke alarm showing front, back, and mounting base with arrows indicating swap steps

Replacement for FireAngel SO-601 9V Optical Smoke Alarm - Firehawk FHB10

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  • Easily replace FireAngel SO-601 alarm with Firehawk FHB10
  • Adaptor plate simply twists onto existing baseplate
  • Battery: 10 year sealed lithium battery
  • Warranty: 10 year manufacturer's warranty
  • Combined test and silence button
  • Suitable for BS 5839-6: 2019 Grade F1 installations
  • CE and Kitemarked to BS EN 14604: 2005
Customer Reviews
£16.78 inc VAT

£15.48 inc VAT

£12.90 ex VAT

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Free Delivery
Replacement for fireangel st 620 10 year smoke alarm ultrafire ulls10 showing the alarm and mounting base with arrows indicating swap direction

Replacement for FireAngel ST-620 10 Year Smoke Alarm - Firehawk FHB10

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  • Easily replace FireAngel ST-620 alarm with Firehawk FHB10
  • Adaptor plate simply twists onto existing baseplate
  • Battery: 10 year sealed lithium battery
  • Warranty: 10 year manufacturer's warranty
  • Combined test and silence button
  • Suitable for BS 5839-6: 2019 Grade F1 installations
  • CE and Kitemarked to BS EN 14604: 2005
Customer Reviews
£16.78 inc VAT

£15.48 inc VAT

£12.90 ex VAT

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Free Delivery
replacement for fireangel st 622 10 year smoke alarm ultrafire ulls10 showing front view with test reset button and rear base with wiring terminals

Replacement for FireAngel ST-622 10 Year Smoke Alarm - Firehawk FHB10

See Description...
  • Easily replace FireAngel ST-622 alarm with Firehawk FHB10
  • Adaptor plate simply twists onto existing baseplate
  • Battery: 10 year sealed lithium battery
  • Warranty: 10 year manufacturer's warranty
  • Combined test and silence button
  • Suitable for BS 5839-6: 2019 Grade F1 installations
  • CE and Kitemarked to BS EN 14604: 2005
Customer Reviews
£16.78 inc VAT

£15.48 inc VAT

£12.90 ex VAT

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660mbx push replacement smoke alarm showing a wiring base with coloured arrows pointing to front cover and sensor unit

Replacement Smoke Alarm for BRK 660MBX and 670MBX - easichange® SBBRKSM

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  • easichange® replacement alarm kit for BRK 660MBX and 670MBX alarms
  • Optical smoke detector to replace optical and ionisation alarms
  • FREE easichange® tool included with every purchase
  • Quick change guide for easy replacement
  • Fits onto existing BRK baseplate
  • Suitable for BS 5839-6: 2019 Grade D2 installations
4.9 out of 5 stars

£41.50 inc VAT

£34.58 ex VAT

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Diagram showing parts of the 690mbx twist replacement heat alarm with coloured arrows pointing to components

Replacement Heat Alarm for BRK 690MBX - easichange® SBBRKHE

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  • easichange® replacement alarm kit for BRK 690MBX alarms
  • Heat detector to replace alarms in kitchens and garages
  • FREE easichange® tool included with every purchase
  • Quick change guide for easy replacement
  • Fits onto existing BRK baseplate
  • Suitable for BS 5839-6: 2019 Grade D2 installations
4.8 out of 5 stars

£24.98 inc VAT

£20.82 ex VAT

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Part of the deta1111 1115 twist replacement smoke alarm shown in a simple replacement diagram with arrows indicating assembly steps

Easichange Replacement for DETA 1111 & 1113 Mains Powered Smoke Alarms

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  • Power: 230V mains with back-up battery
  • Back-up Battery: 9V alkaline back-up battery (included)
  • Warranty: 3 year manufacturer's warranty
  • Fully compatible replacement for DETA 1111 & 1113 smoke alarms
  • Fits onto your existing alarm base – no electrician needed
  • Optical sensor technology
  • Kitemarked to BS EN 14604: 2005
4.8 out of 5 stars

£41.50 inc VAT

£34.58 ex VAT

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deta1115 twist replacement heat alarm showing product and mounting diagram with coloured arrows indicating connections

Easichange Replacement for DETA 1115 Mains Powered Heat Alarm

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  • Power: 230V mains with back-up battery
  • Back-up Battery: 9V alkaline back-up battery (included)
  • Warranty: 3 year manufacturer's warranty
  • Fully compatible replacement for DETA 1115 heat alarms
  • Fits onto your existing alarm base – no electrician needed
  • Combined Test & Hush button
  • Kitemarked to BS 5446-2: 2003
4.8 out of 5 stars

£24.98 inc VAT

£20.82 ex VAT

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Front view of replacement mains powered smoke alarm showing the main circular unit with button and vents

Replacement for Ei141 and Ei141RC Mains Powered Smoke Alarms

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  • Power: 230V mains with back-up battery
  • Back-up Battery: Replaceable 9V alkaline battery
  • Warranty: 5 year warranty
  • Fits onto your existing Ei141 smoke alarm base
  • Fully compatible replacement for Ei141 smoke alarms
  • Upgrade to optical sensor technology for fewer false alarms
  • Kitemarked to BS EN 14604: 2005
4.9 out of 5 stars

£38.75 inc VAT

£32.29 ex VAT

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replacement mains powered smoke alarm showing front view with buttons and vents on white background

Replacement for Ei161, Ei161RC and Ei161e Mains Powered Smoke Alarms

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  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Fits onto your existing Ei161 smoke alarm base
  • Fully compatible replacement for Ei161 smoke alarms
  • Upgrade to optical sensor technology for fewer false alarms
  • Kitemarked to BS EN 14604: 2005
5 out of 5 stars
£56.63 inc VAT

£53.80 inc VAT

£44.83 ex VAT

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Front view of a white replacement mains powered smoke alarm showing the main button and outer casing

Replacement for Ei166, Ei166RC and Ei166e Mains Powered Smoke Alarms

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  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Fits onto your existing Ei166 smoke alarm base
  • Fully compatible replacement for Ei166 smoke alarms
  • Improved optical sensor technology for fewer false alarms
  • Kitemarked to BS EN 14604: 2005
Customer Reviews
£56.63 inc VAT

£53.80 inc VAT

£44.83 ex VAT

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front view of the replacement mains powered heat alarm showing both the front cover and the back mounting plate with arrows

Replacement for Ei164, Ei164RC and Ei164e Mains Powered Heat Alarms

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  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Fits directly onto your current Ei164 heat alarm base
  • Fully compatible replacement for all Ei164 heat alarms
  • Ideal for kitchens, lofts, garages and workshops
  • Kitemarked to BS 5446-2: 2003
Customer Reviews
£57.83 inc VAT

£54.94 inc VAT

£45.78 ex VAT

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Front view of replacement mains powered smoke alarm showing the circular device with buttons and vents

Replacement for Ei151 Mains Powered Smoke Alarm

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  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Alarm test and silence button
  • Optical sensor technology for fewer false alarms
  • LED power and function indicators
  • Kitemarked to BS EN 14604: 2005
4.8 out of 5 stars
£56.63 inc VAT

From: £53.80 inc VAT

£44.83 ex VAT

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Replacement mains powered smoke alarm shown from the front with arrows indicating connection points and wiring

Replacement for Ei156 Mains Powered Smoke Alarm

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  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Test and hush button feature
  • Optical sensor technology to reduce nuisance alarms
  • Replacement alarm base and fixings included
  • Kitemarked to BS EN 14604: 2005
Customer Reviews
£56.63 inc VAT

From: £53.80 inc VAT

£44.83 ex VAT

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Front view of replacement mains powered heat alarm showing circular white device with vents and central button

Replacement for Ei154 Mains Powered Heat Alarm

See Description...
  • Power: 230V mains with back-up battery
  • Back-up Battery: Self-charging lifetime battery
  • Warranty: 5 year warranty
  • Test and hush button feature
  • Heat sensor for use where smoke alarms cannot be fitted
  • LED power and function indicators
  • Kitemarked to BS 5446-2: 2003
Customer Reviews
£57.83 inc VAT

From: £54.94 inc VAT

£45.78 ex VAT

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