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Smoke and Heat Alarm Replacement

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.

Read more about replacement smoke and heat alarms...

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 replacement 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.

Product Selection

Compatible replacements maintain existing mounting and wiring configurations wherever possible. This approach minimises installation costs while ensuring seamless integration with remaining system components.

Enhanced models offer improved features over original equipment specifications. Upgrades may include better sensors, extended warranties, or additional functionality not available in older designs.

Our comprehensive replacement guide details compatibility options for major discontinued models. This resource simplifies specification processes for property managers and contractors.

For professional advice on system upgrades, consult our technical support team. Expert guidance ensures appropriate selections for specific application requirements.

Maintain continuous protection with modern replacement technology. Contact our specialists today to identify suitable upgrades for your discontinued fire detection equipment.

Frequently Asked Questions (FAQs)

How do I identify my discontinued Kidde Firex smoke alarm model?

A discontinued Kidde Firex smoke alarm typically has model numbers printed on the alarm unit or base plate, which can be cross-referenced with our replacement compatibility guide.

Can new alarms connect to old Kidde Firex wiring systems?

Yes, in some cases. It depends on the model, but some Kidde Firex alarms can be replaced with a new replacement alarm that fits directly onto the base and interconnects with the older units.

What happens if I can't find replacement parts for my old smoke alarm?

When replacement parts are unavailable, complete alarm replacement is necessary to maintain fire protection, as deteriorated sensors become unreliable over time.

Do replacement smoke alarms need to match the original specifications exactly?

Replacement smoke alarms should meet or exceed original specifications and maintain compatibility with existing installation infrastructure and interconnection systems if possible.

Replacement for FireAngel SI-610 10 Year Smoke Alarm - UltraFire ULLS10

  • Easily replace FireAngel SI-610 alarm with UltraFire ULLS10
  • 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
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4.8 out of 5 stars

£22.43 inc VAT

£18.69 ex VAT

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Replacement for FireAngel SO-601 9V Optical Smoke Alarm - UltraFire ULLS10

  • Easily replace FireAngel SO-601 alarm with UltraFire ULLS10
  • 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
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4.8 out of 5 stars

£22.43 inc VAT

£18.69 ex VAT

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Replacement for FireAngel ST-620 10 Year Smoke Alarm - UltraFire ULLS10

  • Easily replace FireAngel ST-620 alarm with UltraFire ULLS10
  • 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
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4.7 out of 5 stars

£22.43 inc VAT

£18.69 ex VAT

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Replacement for FireAngel ST-622 10 Year Smoke Alarm - UltraFire ULLS10

  • Easily replace FireAngel ST-622 alarm with UltraFire ULLS10
  • 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
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4.7 out of 5 stars

£22.43 inc VAT

£18.69 ex VAT

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Replacement for Kidde KF10 Mains Powered Smoke Alarms

  • 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
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4.8 out of 5 stars

£21.00 inc VAT

£17.50 ex VAT

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

  • 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
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4.9 out of 5 stars

£39.95 inc VAT

£33.29 ex VAT

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Replacement Heat Alarm for BRK 690MBX - easichange® SBBRKHE

  • 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
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4.9 out of 5 stars

£24.00 inc VAT

£20.00 ex VAT

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Easichange Replacement for DETA 1111 & 1113 Mains Powered Smoke Alarms

  • 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
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4.8 out of 5 stars

£39.95 inc VAT

£33.29 ex VAT

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Easichange Replacement for DETA 1115 Mains Powered Heat Alarm

  • 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
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4.8 out of 5 stars

£24.00 inc VAT

£20.00 ex VAT

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Replacement for Ei141 and Ei141RC Mains Powered Smoke Alarms

  • 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
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4.9 out of 5 stars

£38.75 inc VAT

£32.29 ex VAT

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Replacement for Ei161, Ei161RC and Ei161e Mains Powered Smoke Alarms

  • 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
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4.9 out of 5 stars

£53.87 inc VAT

£44.89 ex VAT

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Replacement for Ei166, Ei166RC and Ei166e Mains Powered Smoke Alarms

  • 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
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4.8 out of 5 stars

£53.87 inc VAT

£44.89 ex VAT

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Replacement for Ei164, Ei164RC and Ei164e Mains Powered Heat Alarms

  • 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
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4.9 out of 5 stars

£55.07 inc VAT

£45.89 ex VAT

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Replacement for Ei151 Mains Powered Smoke Alarm

  • 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
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4.8 out of 5 stars

From: £53.87 inc VAT

£44.89 ex VAT

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Replacement for Ei156 Mains Powered Smoke Alarm

  • 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
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4.9 out of 5 stars

From: £53.87 inc VAT

£44.89 ex VAT

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Replacement for Ei154 Mains Powered Heat Alarm

  • 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
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4.8 out of 5 stars

From: £52.31 inc VAT

£43.59 ex VAT

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Why do Smoke Alarms have to be replaced after 10 Years?

Why do Smoke Alarms have to be replaced after 10 Years?

A number of studies assessed the impact of ageing on smoke alarms.

A nationwide study was undertaken by the Consumer Product Safety Commission (CPSC) in the USA and found that after ten years only 73% of smoke alarms was still working. Ageing alarms may experience sensitivity drifting, which may, in turn, result in an increased frequency of accidental activation.

Canada's Ontario Housing Corporation carried out a study supporting saying that after 30 years, nearly all the smoke alarms will have failed. They conclude that replacement after ten years, with roughly a 30% probability of failure, is an appropriate balance between safety and cost.

All our manufacturers recommend a replacement of the smoke alarms (or at least of the smoke alarm heads) every 10 years.

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