Airthings View Plus

At a glance

• In its favour
• Plain fact
• Worth knowing
• Not stated by the maker

• In its favour: Import whole nights from its CSV
• In its favour: Six AA batteries, or USB
• Worth knowing: Self-calibration on; no off setting found
• Not stated by the maker: Altitude correction not stated

With HouseExhale

The app looks at your bedroom’s CO₂ across the night and checks it against the 800 ppm goal. Here’s how this monitor’s nights get in.

Finding last night’s high

Open the Airthings app each morning and look at last night’s CO₂ history. Note the highest point while people were asleep, and type it in the app.

Its export is a CSV the app can import, so you can bring in whole nights instead of typing.

Where to put it: about head height, at least 2 ft from anyone’s face, away from windows, doors and vents, and in the same spot every night. More on placement

Calibrating it

• Worth knowing: Self-calibration on; no off setting foundOn, with no setting to turn it off (updates weekly; a reviewer found no setting for it)

Outdoor air is about 425 ppm. Outside in the shade, a good monitor settles between about 400 and 450 within 15 to 30 minutes. Many monitors treat fresh air as 400, so 400 to 420 is normal. Can I trust my monitor?

Specs

Sensor and accuracy

True CO₂ (NDIR), ±(50 ppm + 5%), plus radon and particles

Self-calibration

On, with no setting to turn it off (updates weekly; a reviewer found no setting for it)

Corrects for altitude

Not stated by the maker

Also measures

Radon, particles (PM), VOCs, temperature, humidity and air pressure

CO₂ range

400–5,000 ppm

How often it updates

CO₂ is measured every 5 minutes on batteries and every 2.5 minutes on USB. A reviewer adds that it sends readings to the Airthings cloud every 10 minutes by default (“Latest data” mode), every hour in “Longest battery life” mode, and every 2.5 minutes on USB.

Power

Six AA batteries (up to 2 years) or USB-C

Screen

2.9-inch e-paper

History

Wi-Fi; the web dashboard exports up to a year as a CSV

App

Airthings app (free) for iPhone and Android (one of the three latest major versions, with Bluetooth 4.2 or later)

Exports a CSV

Yes

Connects by

Wi-Fi (2.4 GHz), Bluetooth LE and Airthings SmartLink. Readings go through Airthings’ cloud; a reviewer found no way to read it locally.

Alarm

No sound alarm mentioned. A red, yellow or green glow shows air quality. A reviewer says levels and notifications can be adjusted in the Airthings app, and gives Airthings’ CO₂ levels as green below 800 ppm, yellow 800–1,000 and red above 1,000.

Smart home

Airthings lists IFTTT, Google Assistant and Amazon Alexa. Home Assistant: the official Airthings integration works through Airthings’ cloud (“Cloud Polling”), with an ID and secret from the Airthings dashboard. Home Assistant’s Bluetooth integration (Airthings BLE) doesn’t list the View Plus. Apple Home and Matter: no, per a comparison site.

Size

17 × 9 × 3.3 cm (6.7 × 3.5 × 1.3 in)

Weight

360 g (12.7 oz) with batteries, without the cable

Works in

4–40 °C (39–104 °F), 0–85% humidity, non-condensing

In the box

The monitor, six AA batteries, a USB cable, a quick start and regulatory booklet, and double-sided tape

Warranty

1 year standard (2 years in the EU/EEA). Registering within 30 days of purchase extends it to 5 years in total, for consumer monitors bought after August 1, 2022.

Specs from the maker’s own pages, checked October 12 and October 17, 2026. “Not stated by the maker” means no maker page we could open says.

Turning ventilation up

Home Assistant’s Airthings integration reads it through Airthings’ cloud, not locally, so an automation depends on the internet. Home Assistant: Airthings integration

With a smart-home relay on a ventilator’s high-speed input, that reading can turn an HRV or ERV up at 750 ppm and back down at 650. Through the cloud, it stops when the internet does, so set the relay to switch itself back off. Ventilator makers don’t document this, so check your unit’s manual first, and keep to low-voltage inputs.

CO₂ controls · Make the system you have turn up by itself

Before you buy

• Plain fact: About $330 before tax and shipping$329.99 at Airthings and The Home Depot.

About $330, checked October 2026. Prices change often; we checked at the maker’s store and large US retailers. Any monitor that measures true CO₂ works with HouseExhale, and one is enough: move it between rooms.

Airthings View Plus at Airthings (opens in a new tab)

Compare it

The monitors closest to it in price.

• 

  Awair Element

  About $299

  Shows an air score on the device, and its app exports the last 30 days. Needs a plug.

• 

  Airthings Wave Plus

  About $230–$250

  Measures radon too. It has no screen: you read the numbers in the Airthings app.

Compare the three side by side