Air quality monitor for a wood burner
Updated: October 2026
You open the stove door to add a log and you want a number rather than a guess. An air quality monitor can give you that number if it measures particles. It cannot tell you the stove is safe, legal in a smoke control area, or free of carbon monoxide. The reading you want is PM2.5. Carbon dioxide is the wrong primary signal for that smoke. A carbon monoxide alarm stays a different product. The meters are in the [air quality monitor comparison](/hub/climate-measuring/air-quality-monitor).
You open the stove door to add a log and you want a number rather than a guess. An air quality monitor can give you that number if it measures particles.
You open the stove door to add a log and you want a number rather than a guess. An air quality monitor can give you that number if it measures particles. It cannot tell you the stove is safe, legal in a smoke control area, or free of carbon monoxide. The reading you want is PM2.5. Carbon dioxide is the wrong primary signal for that smoke. A carbon monoxide alarm stays a different product. The meters are in the air quality monitor comparison.
Our top picks
| Badge | Product | Particles | CO2 sensor | Real-time use | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Temtop Temtop S1 | PM2.5 laser | Not listed | Live mode, or ECO interval | 8.7 | about £31.99 | View offer |
| Alternative |  Temtop Temtop P600 | PM2.5 and PM10, laser | Not listed | 12-hour PM2.5 chart | 6.9 | about £69.99 | View offer |
 BREATHE BREATHE Airmonitor Plus Gen 2 | PM1, PM2.5, PM10, laser | NDIR | Up to 6 h, then USB-C | 9.0 | about £99.99 | View offer |
On this page
The number you want is particles
Stove smoke and frying smoke are particles. A CO2 sensor is looking for the gas people breathe out, not for the haze when the door opens. You can air the room, watch CO2 fall, and still have had a particle spike the CO2 meter never showed. The straightforward glance in this set is the Temtop S1 at about £31.99: laser PM2.5, temperature and humidity, 4.4 from 748 reviews, and no CO2 on the listing. Use real-time mode for the minute the door opens. Skip the S1 if you also need a fresh-air answer for a shut bedroom.
The Temtop P600 at about £69.99 is the one to open if you want PM10 as well as PM2.5 and a histogram of the last 12 hours. The bullets say particles only, at 4.4 from 153 reviews. An attribute says electrochemical, which conflicts with the laser bullet. BREATHE also measures particles and states NDIR CO2, but CO2 is the wrong primary signal for stove smoke. Why particles and CO2 diverge is on PM2.5 or CO2.
What Defra asks of the fire, which a meter cannot sign off
Defra’s Burn Better guidance is about the fuel and the appliance, not about which meter to buy. Dry wood means 20 percent moisture or less. Ready to Burn is the fuel mark Defra points to. Wet wood makes more smoke, which is why a meter can look worse on a damp log. New stoves on the UK market since January 2022 must be Ecodesign. In a smoke control area, wood goes on a Defra-exempt appliance, and only with the permitted fuel. A low PM2.5 number is not permission to burn an unauthorised fuel.
Defra names schemes including HETAS. This page does not give installation steps. A particle meter cannot sign the flue off. Defra’s practical guide of 12 October 2023 says stoves produce less smoke than open fires, and the fuel still has to be dry. If the meter spikes at the door and stays high, look at the wood, the draught and the service.
A door-open minute is not a 24-hour mean
WHO’s 15 µg/m³ figure and Defra’s 0–11 µg/m³ index 1 are 24-hour means. A door-open minute is not those means.
A carbon monoxide alarm is a different product
A laser PM2.5 meter does not replace a carbon monoxide alarm. None of the particle-only Temtops lists that gas. A consumer multi-gas meter does not discharge the duty. The Amazon monitor lists carbon monoxide as one of five factors. That line is not a landlord alarm, and the listing does not include CO2.
Scotland, Wales and Northern Ireland are not copies of the England booklet. The nation-by-nation account is on our carbon monoxide alarm rules page. If you suspect carbon monoxide, contact a Gas Safe registered engineer. Do not try to confirm it by watching PM2.5 fall. Products Compared did not lab-test these monitors. A qualifying amazon.co.uk purchase can earn us a commission at no extra cost to you. This page is from the Products Compared editorial team, as of 15 October 2026.
Common questions
Can an air quality monitor tell you if a wood burner is safe?
No. A laser PM2.5 meter can show particles from the door or the pan. It cannot approve the flue, the fuel, or the installation, and it is not a carbon monoxide alarm. Defra still expects dry wood, a competent installer and, in a smoke control area, an exempt appliance. A calm number on the meter is not that paperwork. If you suspect carbon monoxide, contact a Gas Safe registered engineer rather than waiting for a particle reading to reassure you.
Which reading matters, PM2.5 or CO2, when you light the stove?
PM2.5. The smoke you see when the door opens is particles, and a CO2-only view can miss it. The Temtop S1 states laser PM2.5 and does not list CO2. Put it in real-time mode for that minute, because ECO sampling can skip a short spike. CO2 remains the reading for a shut bedroom later in the evening. One stove session does not turn a particle meter into a ventilation meter.
Do you still need a carbon monoxide alarm?
Yes, as a separate product. In England, from 1 October 2022, a relevant landlord fits one in rented living accommodation with a fixed combustion appliance other than a gas cooker, and a wood stove counts. The booklet is not aimed at owner-occupiers. A PM2.5 meter does not discharge the duty, and neither does the carbon monoxide factor on the Amazon monitor. Scotland, Wales and Northern Ireland are set out on the hub’s alarm-rules page, not guessed from the England text.
Does a low PM2.5 number mean you may burn any wood in a smoke control area?
No. In a smoke control area, wood goes on a Defra-exempt appliance and only with the permitted fuel. A low reading on a consumer meter is not a permit. Wet wood, above the 20 percent moisture Defra talks about, makes more smoke even on an exempt stove. Ready to Burn is the fuel mark in that guidance. The meter can show you a bad log. It cannot authorise the fuel.
Why did frying score higher than the stove in someone else’s review?
Because the pan can throw a short, high particle spike, and a review is one kitchen, not a law of physics. On the P600’s UK listing, reviewers mention both a wood burner and a frying spike, and one mentions a figure over 200. That figure is their comment, not our measurement, and it is not a Defra 24-hour band. Your stove, your wood and your hood will not copy their evening. Use your own real-time reading.
Is the Amazon monitor’s carbon monoxide sensor a legal alarm?
No. The listing names carbon monoxide as one of five factors, with PM2.5, VOC, humidity and temperature. It does not include CO2, and it is not the alarm a landlord fits under the England regulations. There is also no star line in the saved listing. If you want Alexa routines for particles, it can do that job. It does not replace the alarm on the wall, and it does not make a stove legal in a smoke control area.
Related pages
Sources
Public UK and international sources used for this comparison. Listing prices are from amazon.co.uk on 15 October 2026.
- GOV.UK — ventilation and air quality in education and childcare settings (retrieved 15 October 2026)
- Approved Document F Volume 1 (2026) — ventilation (retrieved 15 October 2026)
- Approved Document F Volume 2 — buildings other than dwellings (retrieved 15 October 2026)
- WHO global air quality guidelines 2021 (retrieved 15 October 2026)
- WHO indoor formaldehyde guideline, 0.1 mg/m³ over 30 minutes (retrieved 15 October 2026)
- The Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 (retrieved 15 October 2026)
- GOV.UK — radon (retrieved 15 October 2026)
- Defra Daily Air Quality Index — PM2.5 (retrieved 15 October 2026)