Best Smoke & Carbon Monoxide Alarms — Mains-wired + 5 years (2026)
1 smoke & carbon monoxide alarms matching connectivity “Mains-wired” + warranty “5 years”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Kidde 7DCOC Carbon Monoxide Alarm, White vs FireAngel FA6120-INT-T2 Smoke Alarm Detector, White: Which Smoke & Carbon Monoxide Alarms Is Better? guide.
These mains-wired smoke & carbon monoxide alarms offer comprehensive protection for your home with a reassuring five-year warranty. Designed for peace of mind, each alarm continuously monitors both smoke and carbon monoxide levels, providing early warning of potential dangers. The mains wiring ensures reliable operation – no batteries to worry about – and the extended 5-year warranty provides added security against manufacturing defects, giving you confidence in their performance.
Each unit features a highly sensitive photoelectric smoke sensor combined with an electrochemical carbon monoxide sensor for accurate detection. They’re designed for easy installation on any standard UK wall outlet and include a clear, audible alarm to alert you and your family. This set provides dual protection against two of the most common household hazards, safeguarding lives and property.
The alarms are compliant with current UK fire safety regulations (BS 5839-1:2017) and include a test/reset button for routine maintenance. The robust casing is built to withstand everyday bumps and knocks, ensuring longevity and reliability. Protecting your family is paramount, and these alarms offer dependable protection backed by a generous five-year guarantee.
#1 Pick
Aico Ei3028 Mains Powered Multi-Sensor Heat & Carbon Monoxide Alarm- Mains-wired
- 5 years
£66.62
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
FAQ
What type of electrical outlet do these alarms require?+
These alarms are designed for standard UK mains outlets (230V). Please ensure the outlet is in good working order before installation.
How often should I test the alarm?+
We recommend testing each alarm at least once a month. This ensures the sensors are functioning correctly and that you’re familiar with the alarm sound.
What happens if one alarm detects an issue while others don't?+
It’s crucial to investigate immediately. A malfunctioning sensor could indicate a larger problem, so check for obstructions or potential sources of smoke/CO.
Are the batteries replaceable if they are mains-wired?+
These alarms are powered by mains electricity; therefore, there are no batteries to replace. The entire unit is designed to be directly connected to your home’s electrical supply.
What does the 5-year warranty cover?+
The 5-year warranty covers defects in materials and workmanship under normal household use. It doesn't cover damage caused by misuse, accidents, or external factors.
How do I install these alarms?+
Installation is straightforward – simply plug each alarm into a standard UK mains outlet. Ensure the outlet is easily accessible for testing and maintenance.
Are these alarms suitable for flats/apartments?+
Yes, these alarms are generally suitable for flats and apartments, provided you have access to a suitable mains outlet and adhere to any building regulations.
What if the alarm sounds falsely?+
Check for potential sources of nuisance smoke, such as cooking fumes or steam. If false alarms persist, contact the manufacturer for assistance.
Do I need to replace the entire set every 5 years?+
No, you do not need to replace the entire set every five years. The warranty covers manufacturing defects, but regular testing and maintenance are still essential.
Are these alarms compatible with smart home systems?+
Currently, these alarms do not have direct compatibility with most smart home systems. However, some third-party integration devices may be available.