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Carbon Monoxide Alarm

Carbon monoxide is invisible, odourless and deadly — an alarm is the only way to know it's there, and essential wherever you burn fuel for heat, light or cooking.

Carbon Monoxide Alarm

Why it matters

Carbon monoxide has no smell, colour or taste, and it kills by stealth — often while people sleep. It's produced by any burning fuel: gas boilers, wood stoves, camping stoves used indoors, generators and paraffin heaters. In an emergency, when people improvise heating and cooking, the risk spikes. A CO alarm is the only reliable warning you'll get.

It's a small, inexpensive device that quite literally saves lives. Every home with a fuel-burning appliance should have one, and a portable unit is essential in caravans, boats, and anywhere you might run a stove or heater during a power cut.

When to use it

Fit one near sleeping areas and any fuel-burning appliance at home, and take a portable unit when using gas or solid-fuel heating and cooking away from mains power — caravans, boats, cabins. Crucially, never run a camping stove, barbecue or generator in an enclosed space, alarm or not; the alarm is a last line of defence, not a licence.

Features to look for

A sealed 10-year battery

A sealed long-life battery means a decade of protection with no forgotten battery changes — ideal for a device you must not let go flat.

A clear digital display

A screen showing CO levels lets you see a problem building before the alarm point, and confirm the air is clear afterwards.

Portability and a loud alarm

A portable unit covers caravans, boats and power-cut heating; a loud 85dB+ alarm wakes you from sleep, which is when CO is most dangerous.

Common mistakes

Using fuel appliances indoors without ventilation

No alarm makes it safe to run a camp stove, BBQ or generator in a closed room or tent. Keep them outdoors — the alarm is a backup, not permission.

Never testing it

An untested alarm may be dead when it matters. Press the test button periodically and replace the unit at its end-of-life date.

Top picks · Trusted suppliers

Recommended products

FireAngel FA6813 Carbon Monoxide Alarm

FireAngel FA6813 Carbon Monoxide Alarm

A portable carbon monoxide alarm with a sealed 10-year battery and digital display, giving a loud early warning of CO from boilers, stoves, heaters and generators.

  • Sealed 10-year battery
  • Digital CO level display
  • Portable for caravans and boats
Check price on Amazon →
Kidde 2030-DCR Carbon Monoxide Alarm

Kidde 2030-DCR Carbon Monoxide Alarm

A compact carbon monoxide alarm with a sealed 10-year life and a digital display showing detected CO levels. Worth fitting near any fuel-burning appliance, wood burner or where you might run a stove indoors during a power cut. Set-and-forget protection against a gas you can neither see nor smell.

  • 10-year sensor life so it lasts as long as it should before replacement
  • Digital readout shows CO levels, not just an on/off alarm
  • Compact enough for hallways, boats and caravans
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Kidde 10LLDCO Carbon Monoxide Alarm (10-Year)

Kidde 10LLDCO Carbon Monoxide Alarm (10-Year)

A sealed carbon monoxide alarm with a digital display and a 10-year battery you never change, so it's fit-and-forget until it needs replacing. It matters most if you run any fuel-burning kit — a boiler, wood burner, gas hob or a camping stove used near a doorway — where CO is invisible and odourless. Fit one per level of the home and near sleeping areas rather than relying on a single unit.

  • Sealed 10-year battery — no fiddly replacements over its life
  • Digital display shows CO levels, not just an alarm
  • Detects a genuinely invisible, odourless hazard from any fuel burner
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FireAngel CW1-PF-T Mains Carbon Monoxide Alarm

FireAngel CW1-PF-T Mains Carbon Monoxide Alarm

A mains-powered carbon monoxide alarm with battery backup from FireAngel, a well-known UK safety brand. Because it is wired to the mains it is suited to a fixed installation near a boiler or gas appliance, with the backup cell keeping it working through a power cut. A sensible option if you would rather not rely on a purely battery-powered CO alarm.

  • Mains-wired with battery backup for continuous protection
  • From FireAngel, an established UK home-safety maker
  • Keeps monitoring through a power cut, when heating risks can rise
Check price on Amazon →
Alertlink 10-Year Carbon Monoxide Alarm with LCD Display

Alertlink 10-Year Carbon Monoxide Alarm with LCD Display

A battery carbon monoxide alarm with a sealed 10-year cell, so there is nothing to replace for the life of the unit. The LCD shows the current CO reading and there is no wiring to do, which makes it easy to add near a boiler, wood burner or portable stove. A basic safety item worth having anywhere fuel is burned indoors.

  • Sealed 10-year battery, no cell changes for the unit's life
  • LCD shows live CO readings, not just an alarm state
  • Battery-only fitting means no wiring or electrician
Check price on Amazon →
FireAngel Carbon Monoxide Alarm

FireAngel Carbon Monoxide Alarm

A sealed-battery CO alarm from one of the better-known UK fire-safety brands, designed to sit near any fuel-burning appliance – gas boiler, wood burner, camping stove used indoors or a generator. It's the kind of quiet, cheap safeguard that matters most in winter when homes are shut up and heating runs hard. Fit one per floor and test it when the clocks change.

  • Detects carbon monoxide from boilers, stoves, fires and generators
  • Sealed long-life battery so there's nothing to replace or forget
  • Loud alarm with a clear end-of-life warning
Check price on Amazon →
Kidde 5CO Carbon Monoxide Alarm

Kidde 5CO Carbon Monoxide Alarm

A battery-powered carbon monoxide alarm from one of the best-known fire-safety brands, worth fitting near any fuel-burning appliance, wood burner or camping-heater setup. CO is odourless and kills quietly, so a working detector matters most in exactly the cold-weather, doors-shut conditions when you are leaning on heaters. It is supplied with batteries so it is ready to run out of the box.

  • Trusted Kidde sensor with a clear, loud alarm
  • Runs on its own batteries, so it works in a power cut
  • Simple to fit near boilers, burners and heaters
Check price on Amazon →
X-Sense XC0C Carbon Monoxide Detector

X-Sense XC0C Carbon Monoxide Detector

A carbon monoxide alarm with a clear digital display, worth having anywhere you burn gas, wood or run a generator or camping stove. CO is invisible and odourless, so a detector is the only warning you get. Cheap peace of mind for a caravan, boat or any home with a boiler or open flame.

  • LCD display shows live CO levels and peak readings
  • Loud alarm gives early warning of a build-up
  • Compact, freestanding or wall-mounted
Check price on Amazon →
X-Sense Wi-Fi Combination Smoke & Carbon Monoxide Alarm

X-Sense Wi-Fi Combination Smoke & Carbon Monoxide Alarm

A single mains-independent unit that detects both smoke and carbon monoxide and pushes alerts to your phone over Wi-Fi. It's the sensible choice if you want one device covering two silent household risks and a warning even when you're out of the house.

  • Detects smoke and carbon monoxide in one unit, saving wall space and cost
  • Wi-Fi alerts to your phone so you're warned even when away from home
  • Long-life sealed battery means no fiddly annual battery changes
Check price on Amazon →
WISUALARM 10-Year Carbon Monoxide Alarm

WISUALARM 10-Year Carbon Monoxide Alarm

A carbon monoxide alarm with a sealed 10-year battery, so there are no cells to replace over its life and less chance of it being left dead. The LCD shows CO levels and temperature, which helps you spot a slow build-up before it becomes dangerous. Fit one near any fuel-burning appliance, log burner or portable heater you rely on when the power's out.

  • Sealed 10-year battery removes the risk of a flat or missing cell
  • LCD display shows live CO readings and temperature
  • Audible alarm and clear indicators for a fast warning
Check price on Amazon →
X-Sense CO03D Carbon Monoxide Alarm

X-Sense CO03D Carbon Monoxide Alarm

A compact carbon monoxide alarm with a sealed battery rated to last the life of the unit, so there is nothing to replace or forget. Worth fitting near any gas boiler, wood burner or camping heater used indoors during a power cut. A quiet bit of kit that only matters on the one day it really matters.

  • Sealed battery lasts the alarm's stated service life with no swaps
  • Small footprint sits neatly near a boiler or flue
  • Loud alarm and clear test button for peace of mind
Check price on Amazon →
WISUALARM 10-Year Battery Carbon Monoxide Alarm (EN 50291)

WISUALARM 10-Year Battery Carbon Monoxide Alarm (EN 50291)

A sealed 10-year battery CO alarm certified to EN 50291, the standard to look for in the UK. The sealed cell means no annual battery swaps for the life of the unit, and the test/silence button lets you hush a nuisance chirp without pulling anything out. Sensible cover for any room with a boiler, gas hob, wood burner or fuel-burning heater.

  • Meets EN 50291, the UK carbon monoxide alarm standard
  • Sealed 10-year battery — fit it and forget it, no yearly replacements
  • Test and silence button for quick checks and nuisance hushing
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Kidde K10SCO Combination Smoke & CO Alarm with Voice Notification

Kidde K10SCO Combination Smoke & CO Alarm with Voice Notification

A single mains-independent unit that detects both smoke and carbon monoxide, using a spoken alert to tell you which threat it has found rather than leaving you to guess from the beeps. One device on the landing covers two of the biggest winter home risks — heating fires and CO from faulty boilers or flues. A sensible pick where wall space or budget rules out fitting two separate alarms.

  • Detects both smoke and carbon monoxide from one unit
  • Voice notification tells you which hazard triggered it
  • Covers the two main cold-weather home risks in one place
Check price on Amazon →
Safeliveo Wireless Interlinked Smoke, Heat & Carbon Monoxide Alarm Bundle

Safeliveo Wireless Interlinked Smoke, Heat & Carbon Monoxide Alarm Bundle

A wireless interlinked bundle of smoke, heat and carbon monoxide alarms — when one detects a hazard they all sound, which is exactly what Scotland's alarm rules now require and what any home benefits from. Each unit has a sealed 10-year battery and sensor, so there's no annual battery change to forget. A straightforward way to bring an older home up to the interlinked standard without hiring an electrician.

  • Interlinked — one triggered alarm sounds them all across the home
  • Covers smoke, heat and carbon monoxide in a single bundle
  • Sealed 10-year battery and sensor — no annual battery swaps
Check price on Amazon →
FireAngel SCB10-R Combined Smoke & Carbon Monoxide Alarm

FireAngel SCB10-R Combined Smoke & Carbon Monoxide Alarm

A single unit that detects both smoke and carbon monoxide, from FireAngel, one of the UK's established home-safety brands. Combining both sensors in one alarm keeps installation simple and is useful on hallways and landings where both risks matter. A combined alarm complements rather than fully replaces dedicated units in higher-risk rooms, so test it regularly and plan your coverage room by room.

  • Detects both smoke and carbon monoxide in one unit
  • From an established UK home-safety brand
  • Simplifies coverage on hallways and landings
Check price on Amazon →
Meross CS11 Dual Smoke & Carbon Monoxide Alarm

Meross CS11 Dual Smoke & Carbon Monoxide Alarm

One unit that watches for both smoke and carbon monoxide, which saves you fitting and maintaining two separate alarms. It's a sensible choice for a hallway, landing or near a boiler or wood burner where both risks exist. Battery powered, so it keeps guarding through a power cut.

  • Detects smoke and carbon monoxide in a single ceiling-mounted unit
  • Battery powered — no wiring, and it works through a blackout
  • Distinct alarm patterns tell fire and CO events apart
Check price on Amazon →
Kidde 10SCO Combination 10-Year Carbon Monoxide and Smoke Alarm

Kidde 10SCO Combination 10-Year Carbon Monoxide and Smoke Alarm

A single sealed unit that detects both smoke and carbon monoxide, with a 10-year lithium battery designed to last the life of the alarm, so there are no annual battery swaps. It suits a spot that needs to cover both risks at once, such as a hallway near a boiler or a small flat. A test button and end-of-life warning are built in.

  • One unit covers both smoke and carbon monoxide
  • Sealed 10-year lithium battery, no yearly battery changes
  • Fewer devices to fit and maintain in a small home
Check price on Amazon →
CPVAN Wireless Interlinked Smoke, Heat & Carbon Monoxide Alarm Bundle

CPVAN Wireless Interlinked Smoke, Heat & Carbon Monoxide Alarm Bundle

A set of wirelessly interlinked alarms covering smoke, heat and carbon monoxide, so when one is triggered they all sound. That whole-home warning matters most in a house with bedrooms upstairs and a kitchen below, where a single beeping unit is easy to sleep through. They link over radio, so there is no mains rewiring to fit them.

  • Interlinked, so one trigger sounds every alarm in the home
  • Covers smoke, heat for the kitchen, and carbon monoxide
  • Wireless linking means no mains rewiring
Check price on Amazon →
3M 8822 FFP2 Disposable Dust Masks (10-Pack)

3M 8822 FFP2 Disposable Dust Masks (10-Pack)

A ten-pack of 3M's valved FFP2 disposable respirators, the kind you want on hand for dusty clean-up after a flood, storm damage or DIY. The exhalation valve makes them easier to breathe through during longer jobs, and FFP2 filtering handles fine dust and non-oily particles. Not a substitute for FFP3 where finer protection is needed, but a sensible general-purpose layer.

  • Genuine 3M FFP2 filtering for fine dust and debris clean-up
  • Exhalation valve reduces heat and moisture build-up on longer jobs
  • Ten to a pack, so there's always a fresh one in the kit
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3M Aura 9332+ FFP3 Respirator

3M Aura 9332+ FFP3 Respirator

A genuine FFP3 disposable respirator from 3M, the highest particulate filtering class for dust, mould, fine debris and other airborne hazards during clean-up or repairs. The Cool Flow valve cuts heat and moisture build-up so it stays wearable on longer jobs. It is a fit-dependent single-use item, not a substitute for a reusable half-mask if you need protection daily.

  • FFP3 rating filters at least 99% of fine particulates
  • 3M Cool Flow valve reduces heat and breathing resistance
  • Sculpted three-panel shape fits a range of faces
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3M Aura FFP2 Respirator 9322+ (10 Pack)

3M Aura FFP2 Respirator 9322+ (10 Pack)

A pack of ten disposable FFP2 respirators from 3M, the reference name in respiratory protection. The mask to reach for when clearing dust, mould or debris after a flood or storm, or filtering fine particles during any dirty clean-up.

  • FFP2 rating filters at least 94% of airborne particles
  • Trusted 3M build with a moulded fit and exhalation valve
  • Ten-pack means spares for the household and repeat jobs
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Aico Ei146RC Mains-Powered Smoke Alarm (2-Pack)

Aico Ei146RC Mains-Powered Smoke Alarm (2-Pack)

Mains-powered optical smoke alarms with a rechargeable back-up cell, from Aico — the brand fitted as standard in a large share of UK homes and social housing. Unlike battery-only units these wire into the ring and can be interlinked, so one triggered alarm sounds them all. This is the fit-and-forget option for anyone wanting proper hard-wired cover rather than relying on a single stand-alone detector.

  • Mains-powered with a rechargeable back-up so it works in a power cut
  • Can be interlinked so every alarm sounds together
  • Optical sensor suited to slow, smouldering household fires
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AirGearPro D-110C FFP3 Masks (20-Pack)

AirGearPro D-110C FFP3 Masks (20-Pack)

CE-certified valved FFP3 respirators that filter ~99% of fine airborne particles — dust, smoke and debris — with an exhalation valve and adjustable seal for comfortable, protective wear.

  • Genuine FFP3 filtration (~99%)
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AirGearPro M-500 Reusable Respirator (A1P2 Filters)

AirGearPro M-500 Reusable Respirator (A1P2 Filters)

A reusable half-mask respirator with A1P2 filters, so it handles both dust and organic-vapour fumes rather than particles alone. Reach for it during dusty clean-ups, mould removal, spray painting or working with solvents. The replaceable-filter design makes it cheaper over time than getting through boxes of disposables.

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