Air Quality Monitor Full Comparison Y Deyrnas Unedig 2026 — 20 Specs

Best overall

IQAir AirVisual Pro

PM2.5, PM10, CO2, Temp, RH on a 3.5″ colour LCD. Best app and global AQI network.

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Best for CO₂

Aranet4 Home

Dual-wavelength NDIR — most accurate CO2 sensor available at any consumer price. 2-year battery.

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Best for radon

Airthings Wave Plus

Only monitor here with radon detection. Also CO2, VOC, PM2.5, Temp, RH. Critical for basements.

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Best budget

Govee H5106

£59 — 8 sensor channels including HCHO. Maximum data breadth at minimum cost.

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Best professional

Awair Element

5 sensors · Awair Score · API access · Alexa/Google Home. Best for HVAC automation.

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	IQAir AirVisual Pro £219 Gweld ar Amazon.co.uk	Aranet Aranet4 Home £169 Gweld ar Amazon.co.uk	Awair Element £129 Gweld ar Amazon.co.uk	Govee Air Quality Monitor H5106 £59 Gweld ar Amazon.co.uk	Airthings Wave Plus £189 Gweld ar Amazon.co.uk	Kaiterra Laser Egg+ CO₂ £139 Gweld ar Amazon.co.uk
Core specifications
Sensors	PM2.5, PM10, CO2, Temp, RH	CO2, Temp, RH, atmospheric pressure	PM2.5, CO2, VOC, Temp, RH	PM1/2.5/10, CO2, VOC, HCHO, Temp, RH	Radon, CO2, VOC, PM2.5, Temp, RH	PM2.5, CO2, Temp, RH
PM2.5 accuracy	±10 µg/m³ or ±10%	No PM sensor	±15 µg/m³ or ±15%	±20 µg/m³ (indicative)	±20 µg/m³ (indicative)	±10 µg/m³ or ±10%
CO2 range	400–10,000 ppm (NDIR)	0–9,999 ppm (dual-wavelength NDIR)	400–8,000 ppm (NDIR)	400–5,000 ppm (NDIR equivalent)	400–5,000 ppm	400–5,000 ppm (NDIR)
Display	3.5″ colour LCD	E-ink, always-on	LED dot matrix + app	2.4″ colour LCD	Wave LED indicator + app	E-ink circular display
Battery	Mains + 1-hr backup	AA × 2, up to 2 years	Mains only	USB-C rechargeable, ~4 hrs	6× AA, ~16 months	Mains only (USB-C)
Data logging	Cloud + local CSV export	Bluetooth + Aranet Cloud	Cloud + API	Govee app, 30-day cloud	Airthings app + Hub (optional)	Kaiterra app + HomeKit
Performance scores (out of 100)
Accuracy	96	98	84	71	80	88
Sensors	95	74	90	97	93	72
Display / App	98	85	91	78	80	82
Value	72	78	88	96	82	84
Sensor coverage
PM2.5 (laser particle counter)	✓	✗	✓	✓	✓	✓
CO2 (NDIR sensor)	✓	✓	✓	✓	✓	✓
True NDIR CO2 (not electrochemical)	✓	✓	✓	✗	✗	✓
VOC / Total VOC index	✗	✗	✓	✓	✓	✗
Radon detection	✗	✗	✗	✗	✓	✗
HCHO (formaldehyde)	✗	✗	✗	✓	✗	✗
PM2.5 accuracy	±10 µg/m³	No PM sensor	±15 µg/m³	±20 µg/m³	±20 µg/m³	±10 µg/m³
CO2 accuracy	±50 ppm (NDIR)	±30 ppm (dual NDIR)	±75 ppm (NDIR)	±5% (indicative)	±5% (indicative)	±50 ppm (NDIR)
Power & connectivity
Battery-powered option	✗	✓	✗	✓	✓	✗
Battery life	Mains + 1 hr backup	AA × 2 · ~2 years	Mains only	USB-C · ~4 hours	AA × 6 · ~16 months	Mains only (USB-C)
Cloud data logging	✓	✗	✓	✗	✓	✓
Open API access	✓	✗	✓	✗	✗	✓
Apple HomeKit	✗	✗	✗	✗	✗	✓
Alexa / Google Home	✗	✗	✓	✗	✓	✗
Warranty
Warranty	2 years	2 years	1 year	1 year	2 years	1 year

Air quality monitor full comparison

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