Best Smoke & Carbon Monoxide Alarms — Kidde (2026)
7 smoke & carbon monoxide alarms matching brand “Kidde”, 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.
£18.25
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
#2 Pick
Kidde 10Y29 10 Year Longlife Battery Optical Smoke Alarm for Home- Standalone
- 10 years
£14.95
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
#3 Pick
Kidde Smoke Alarm and CO Detector Bundle for Home — 10Y29 10 Year Battery Smoke Alarm and K5CO Battery Carbon Monoxide Detector with AA Batteries- Standalone
- 5 years
£25.00
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
#4 Pick
Kidde 10SCO Combination 10 Year Life Carbon Monoxide and Smoke Alarm Twin Pack- Standalone
- 10 years
£43.95
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
#5 Pick
Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White- 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
#6 Pick
Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm, Digital Display with Sealed Longlife Battery- Standalone
- 10 years
£22.94
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
#7 Pick
Kidde 10SCO Combination Smoke and Carbon Monoxide Alarm with Voice Notification, white- White
£24.90
Pros
- Voice alarm feature
- Hush button
- Test/reset button
- Peak level memory
Cons
- Full specification not confirmed on the listing — check before buying
At a glance
- Products
- 7
- Price range
- £14.95–£43.95
- Average price
- £23.57
- Average rating
- 4.54 / 5
- Total reviews
- 20,061
- Price tier split
- Budget4Mid-range3Premium0
- In stock
- 7
These are Kidde’s range of combined Smoke and Carbon Monoxide alarms. Designed for comprehensive protection within your home, these alarms feature both detection technologies in a single unit, offering early warning against both threats. They're suitable for smaller to medium sized homes and apartments.
Kidde offers a variety of models with different features like battery-powered operation, digital displays, and even smart connectivity options allowing you to monitor your home’s safety from anywhere. Please note that these alarms require regular battery changes – typically every 6-12 months, depending on usage and model - for optimal performance.
Explore the available Kidde Smoke & Carbon Monoxide alarm models currently listed here on Amazon UK, selecting the one best suited to your needs and property size.
FAQ
Are these alarms tamper-proof?
Yes, many Kidde alarms feature a tamper seal. If the seal is broken, it indicates potential tampering and may trigger a loud alarm, alerting you to a possible security issue.
How often do I need to change the batteries?
Kidde recommends changing the batteries at least once a year, ideally twice a year (spring and autumn) to ensure reliable operation. The display will typically indicate low battery levels before complete failure.
Do these alarms require professional installation?
No, Kidde Smoke & Carbon Monoxide alarms are designed for DIY installation. They usually come with clear instructions and mounting hardware for easy setup.
What type of batteries do they use?
Most Kidde models utilize readily available AA or 9V batteries. Always check the specific model’s requirements before purchasing replacements.
Do these alarms have a test button?
Yes, all Kidde Smoke & Carbon Monoxide alarms include a clearly marked test button to verify that both the smoke and carbon monoxide sensors are functioning correctly.
Are there different alarm tones for smoke versus CO?
Typically, Kidde alarms use distinct audible tones – one for smoke detection and another for carbon monoxide detection – to differentiate between the two threats.
How many zones do these alarms have?
Kidde Smoke & Carbon Monoxide alarms usually offer a single zone detection, meaning they will trigger an alarm if either smoke or CO is detected. Some models may offer dual-zone capabilities for increased coverage.
Are these alarms suitable for flats/apartments?
Many Kidde models are suitable for smaller spaces, but always check the maximum room size specification listed on the product page to ensure optimal performance.
What is the decibel level of the alarm?
Kidde alarms meet or exceed UK legal requirements regarding audible alarm levels. The specific decibel rating will vary by model, typically ranging from 85dB – 90dB.
How do I know when an alarm has triggered?
When a smoke or carbon monoxide detection event occurs, the alarm will emit a loud, continuous audible signal. Immediately investigate and follow recommended safety procedures.