Netatmo Air Quality Monitor review

Name: Netatmo Smart Indoor Air Quality Monitor (NHC-UK)
Brand: Netatmo

Netatmo Smart Indoor Air Quality Monitor (NHC-UK)

By Tom Calder

Photo: Amazon

Our verdict · Researched

3.6 / 5

The cheapest genuine CO2 monitor here, and the only one that also measures noise — a real differentiator in a home office or a room next to a busy road. It is old hardware for the money, it has no screen, and it is mains-only, so it goes dark the moment the power does. Its "Asthmatic", "Baby" and "Family" app profiles are adjustable alert thresholds, not health features, and should not be read as anything more.

Best for: A cheap, permanently plugged-in CO2 reading in a room where noise levels are also worth knowing.
Skip it if: You want a CO2 figure you can read at a glance without your phone

Amazon.co.uk price

£107.25

as of 4 Nov 2026, 19:07 GMT · Details

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.

In stock

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Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.

What we like

Cheapest route to a real CO2 reading at the keenest UK sellers
Noise-level sensing that nothing else on this page offers
Wi-Fi straight to the app plus Apple Home compatibility, with no hub to buy separately

Worth knowing

Mains-only via USB adaptor with no battery, so it stops working in a power cut
No screen — readings live in the app, with only a colour-coded LED on the device itself
Apple Home compatibility is a platform feature, not a safety or accuracy credential

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Who shouldn't buy this

Don't buy it if you want a CO2 figure you can read at a glance without your phone — the Aranet4 Home has the display for it.

Key specs

Measures	CO2, temp, humidity, noise level. No PM2.5, VOC, radon or CO.
Display	No screen — press the top for a colour-coded LED summary
Connectivity	Wi-Fi to the Netatmo app, with Apple Home compatibility
Power	Mains only via USB adaptor — no battery, must stay plugged in

How this review works

This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.

How we review →Full methodology →