Best Value Smoke & Carbon Monoxide Alarms in the UK (2026): 10 Real Listings Ranked by Rating per £
Ranked by real rating relative to price across 10 listings in Smoke & Carbon Monoxide Alarms.
Looking for the best smoke and carbon monoxide protection for your home? This guide ranks 10 real listings of alarms based on their rating per £ – ‘best value’ means getting the highest possible rating for the money spent, not just finding the cheapest option. Currently, the FireAngel FA6120-INT-T2 Smoke Alarm Detector, White (4.5/5) leads with a value score of 0.3, demonstrating exceptional ratings relative to its price (£14.99). The Kidde 10Y29 RB and FireAngel FA6620 Optical also feature prominently.
- 1.FireAngel FA6120-INT-T2 Smoke Alarm Detector, White4.5/5 · £14.99 · value 0.300
FireAngel · Smoke & Carbon Monoxide Alarms
- 2.Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White4.4/5 · £15.11 · value 0.291
Kidde · Smoke & Carbon Monoxide Alarms
- 3.FireAngel FA6620 Optical, Battery Powered Fire/Smoke Alarm for Home, 10-Year Battery4.3/5 · £14.99 · value 0.287
FireAngel · Smoke & Carbon Monoxide Alarms
- 4.Defender 10 Year Carbon Monoxide Alarm, BSI Rated, Battery Powered CO Detector with LCD Digital Display4.4/5 · £17.99 · value 0.245
Defender · Smoke & Carbon Monoxide Alarms
- 5.Kidde 10Y29 10 Year Longlife Battery Optical Smoke Alarm for Home4.6/5 · £19.99 · value 0.230
Kidde · Smoke & Carbon Monoxide Alarms
- 6.Aico Ei208 Carbon Monoxide Alarm, White4.6/5 · £22.50 · value 0.204
Aico · Smoke & Carbon Monoxide Alarms
- 7.Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm, Digital Display with Sealed Longlife Battery4.6/5 · £22.94 · value 0.201
Kidde · Smoke & Carbon Monoxide Alarms
- 8.Ei Electronics Ei650i Optical Smoke Alarm, White4.6/5 · £24.59 · value 0.187
Ei Electronics · Smoke & Carbon Monoxide Alarms
- 9.Kidde 7DCOC Carbon Monoxide Alarm, White4.6/5 · £24.99 · value 0.184
Kidde · Smoke & Carbon Monoxide Alarms
- 10.FireAngel Optical Smoke Alarm 2-Pack — FA6620 10-Year Battery Smoke Alarms for Home with Test/Silence Button, Replacement for FireAngel ST-622/ST-6204.3/5 · £24.76 · value 0.174
FireAngel · Smoke & Carbon Monoxide Alarms
Best Value Picks
- FireAngel FA6120-INT-T2 Smoke Alarm Detector, White – Rating: 4.5/5, Price: £14.99, Value Score: 0.3
- Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White – Rating: 4.4/5, Price: £15.11, Value Score: 0.291
- FireAngel FA6620 Optical, Battery Powered Fire/Smoke Alarm for Home, 10-Year Battery – Rating: 4.3/5, Price: £14.99, Value Score: 0.287
What Value Score Tells You
The value score, calculated as rating divided by price, provides a metric for assessing the overall quality relative to cost of each smoke and carbon monoxide alarm. A higher value score indicates a better rating per pound spent.
Notably, the FireAngel FA6120-INT-T2 Smoke Alarm Detector, White achieves the highest value score (0.3) due to its excellent 4.5/5 rating. Conversely, while the Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White has a slightly lower rating, it maintains a respectable value score of 0.291.
How to Use This Leaderboard
- Use the value score as a primary filter – prioritise alarms with higher scores for maximum ratings per pound.
- The cheapest alarm, the FireAngel FA6120-INT-T2 Smoke Alarm Detector, White (£14.99), also has the highest rating (4.5/5).
- Consider the rating alongside the price; a lower-priced alarm with a good value score may represent better value than a more expensive one with a lower score.
See the full range in Smoke & Carbon Monoxide Alarms.
FAQ
What does 'value score' represent in this leaderboard?+
The 'value score' is calculated by dividing the rating of each smoke and carbon monoxide alarm by its price. A higher value score indicates a better rating relative to the cost, suggesting that the product offers good value for money based on customer feedback.
Is the cheapest option always the best value?+
Not necessarily. While the 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' is currently the cheapest at £14.99, its value score of 0.3 indicates a lower rating compared to other options. The 'Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White' has a higher value score (0.291) despite being slightly more expensive (£15.11).
Which product is currently ranked as the top-rated?+
The 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' has the highest rating of 4.5/5 amongst these listings.
What is the value score for the Kidde 10Y29 RB?+
The 'Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White' has a value score of 0.291.
Which product offers the best overall balance between rating and price according to this leaderboard?+
According to the 'value score', the 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' currently represents the best value at 0.3.
How does the FireAngel FA6620 compare in terms of value?+
The 'FireAngel FA6620 Optical, Battery Powered Fire/Smoke Alarm for Home, 10-Year Battery' has a value score of 0.287, placing it slightly lower than the other two listed products.
Is there a significant price difference between the most and least expensive alarms?+
Yes, there is a £0.12 difference between the 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' (£14.99) and the 'Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White' (£15.11).
What factors should I consider when choosing an alarm based on this leaderboard?+
When considering these alarms, you should prioritize your desired rating alongside the price. The 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' offers the highest rating for its cost, while the 'Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White' provides a good balance between rating and price.
Does a higher rating automatically mean a better product?+
Not necessarily. The 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' has the highest rating (4.5/5), but its value score is lower than that of the 'Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White', indicating it might represent a better overall deal based on customer satisfaction relative to cost.
What are the key differences in price between the products?+
The 'FireAngel FA6120-INT-T2 Smoke Alarm Detector, White' is priced at £14.99, the 'Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm, White' at £15.11 and the 'FireAngel FA6620 Optical, Battery Powered Fire/Smoke Alarm for Home, 10-Year Battery' also at £14.99.