Best Smoke & Carbon Monoxide Alarms UK (2026) — Page 3
Smoke alarms and carbon monoxide detectors for UK homes.
Read our full Kidde 7DCOC Carbon Monoxide Alarm, White vs FireAngel FA6120-INT-T2 Smoke Alarm Detector, White: Which Smoke & Carbon Monoxide Alarms Is Better? guide.
£25.49
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
#14 Pick
Ei Electronics Ei650i Optical Smoke Alarm, WhiteRated 4.6 out of 5 stars (567)
- Standalone
- 5 years
£24.20
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
#15 Pick
Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, WhiteRated 4.4 out of 5 stars (3,426)
- Standalone
- 10 years
£14.99
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
#16 Pick
Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm, Digital Display with Sealed Longlife BatteryRated 4.6 out of 5 stars (3,871)
- Standalone
- 10 years
£24.94
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
#17 Pick
Aico Ei3016 230V Mains Powered Optical Smoke Alarm with Rechargeable Battery BackupRated 4.5 out of 5 stars (276)
- Interlinked
- 10 years
£48.99
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
#18 Pick
FireAngel FA6813 Portable Carbon Monoxide Detector/Alarm, 10 Year CO AlarmRated 4.7 out of 5 stars (8,500)
- White
£13.98
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.