Home Safety & Fire Protection — Smoke & Carbon Monoxide Alarms (2026)

Pros

• Optical sensor detects smouldering fires quickly
• Simple test/hush button for false alarms
• Kitemarked to British Standards

Cons

• Standalone unit, no wireless interlink with other alarms

Pros

• Bundle covers both smoke and CO detection in one purchase
• "Toast proof" sensor reduces false alarms near kitchens
• 10-year sealed battery on the CO detector

Cons

• Two separate standalone units, not interlinked

Pros

• Digital display shows live CO readings
• Loud 85dB alarm with test button
• Trusted long-standing safety brand

Cons

• Requires AA batteries, not sealed for 10-year life

Pros

• Sealed 10-year lithium battery, no battery changes needed
• Optical sensor suited to hallways and living rooms
• 10-year manufacturer warranty

Cons

• Sealed unit is replaced rather than serviced at end of life

Pros

• Bundles a 10-year smoke alarm with a separate CO detector
• Trusted long-standing safety brand
• Batteries included, ready to fit out of the box

Cons

• Two standalone units, not interlinked

Pros

• Single unit covers both smoke and CO detection
• Twin pack suits two rooms in one purchase
• Sealed 10-year battery, no replacements needed

Cons

• Combination alarms cost more than separate single-hazard units

Pros

• BSI rated and EN50291 compliant
• LCD digital display for live CO levels
• Sealed 10-year battery life

Cons

• Basic wall/shelf mount only, no interlink feature

Pros

• Mains powered with 10-year rechargeable lithium battery backup
• AudioLINK+ technology extracts diagnostic data via smartphone app
• Automatic dust compensation reduces false alarms

Cons

• Higher price than standalone battery-only smoke alarms

Pros

• Sealed 10-year battery, no replacements needed
• Very high review volume backs up reliability claims
• Replacement model for the popular ST-620/ST-622 series

Cons

• Standalone unit, no wireless interlink with other alarms

Pros

• Wi-Safe 2 wireless interlink links with other Pro Connected alarms
• Sealed 10-year Panasonic battery, no replacements needed
• Optional app and gateway for remote notifications

Cons

• Full smart features require a separately sold Connected Gateway

Pros

• Twin pack covers two rooms in one purchase
• Sealed 10-year lithium battery, no replacements needed
• Test/silence button for easy false-alarm hushing

Cons

• Standalone units, no wireless interlink between the two alarms

Pros

• 10-year sensor life reduces long-term running costs
• Twin pack suits both kitchen and bedroom coverage
• Compact and portable, suits travel and caravans too

Cons

• Batteries are replaceable rather than fully sealed for 10 years

Pros

• Sealed lithium battery rated for a 10-year life
• Electrochemical sensor with memory function for peak CO readings
• Trusted Aico build quality used widely by UK housing providers

Cons

• Standalone unit — needs a RadioLINK+ module to interlink with other Aico alarms

Pros

• Continuous self-check reduces false alarms
• Easy to install with test button
• Trusted Ei Electronics/Aico safety brand

Cons

• Standalone unit, no wireless interlink

Pros

• Combines heat and CO sensing in one mains-powered unit
• Rechargeable lithium back-up keeps it working in a power cut
• Energy Class A+ rated

Cons

• Mains wiring installation, not a simple battery unit

Pros

• Sealed 10-year lithium battery needs no replacing
• Reduced sounder output when testing avoids startling the household
• Loud 85dB alarm with simple test/hush button

Cons

• Sealed unit is replaced rather than serviced at end of life

Pros

• Digital display shows live CO readings at a glance
• Sealed 10-year battery removes the need for replacements
• 10-year manufacturer warranty backs the sensor life

Cons

• Slightly pricier than a basic indicator-light CO alarm

Pros

• 230V mains powered with 10-year rechargeable battery backup
• AudioLINK+ lets you extract alarm history via smartphone app
• Interlinks with other Aico RadioLINK and hard-wired alarms

Cons

• Mains wiring means professional installation is usually required

Pros

• CARBON MONOXIDE ALARMS FOR HOME USE: The advanced electrochemical sensor detects dangerous levels of carbon monoxide (CO) in your home, alerting you with 4 loud chirps (85 dB(A) at 3 metres) and a flashing red ‘CO’ LED light. NEVER IGNORE THIS ALARM.
• TEST BUTTON: Press the large test button to ensure your CO detector is working properly. A loud, high-pitched sound and the red LED flashing four times will verify that the alarm is functioning correctly.
• BATTERIES INCLUDED: Each CO monitor comes with 2 replaceable AA batteries. A flashing amber '!' and an audible chirp will alert you when the batteries need replacing. Test your FireAngel carbon monoxide alarm regularly to ensure it is operational.
• SLEEP EASY FUNCTION: Press the large test button to silence the low battery alert. This activates the Sleep Easy mode on the carbon monoxide monitor, muting the low battery chirp for 8 hours whilst the amber light flashes. Replace the batteries ASAP.

Cons

• Only suitable for English and Welsh homes.
• Does not work in Scottish homes under new regulations.

Pros

• Voice alarm feature
• Hush button
• Test/reset button
• Peak level memory

Cons

• Full specification not confirmed on the listing — check before buying

Pros

• DUAL PROTECTION: This combination carbon monoxide (CO) and smoke detector offers vital protection against both CO and fire risks. The CO sensor alerts you to invisible gas dangers, and the optical smoke sensor quickly 'sees' slow, smouldering fires.
• 10 YEAR BATTERY: Each 2 in 1 carbon monoxide and smoke alarm for home use comes with a 10 year sealed battery that lasts the alarm's lifetime. When the device needs replacing, it will ‘chirp’ twice and the amber LED will flash twice every 40 seconds.
• ADVANCED DETECTION: The advanced optical sensing technology reduces nuisance smoke alarms by 'seeing' thick white smoke as it enters the alarm, while the advanced electrochemical CO sensing technology provides improved CO detection.
• DISTINCT ALARM SOUNDS: The dual smoke and carbon monoxide alarm features clear visual indicators and separate alerts for each hazard, allowing you to easily identify the specific danger when the alarm sounds

Cons

• No specific positioning guidelines for optimal installation.
• Warranty only covers part of the product lifespan.