Best CO2 monitor for most homes: value or premium protection?

Display

Neither product is a traditional “screen-first” gadget, so this category is really about how clearly you can read the readings and how useful the interface is day to day. The SwitchBot CO2 detector is the more straightforward monitor: it’s designed to show temperature, humidity and CO2 in a simple, practical way, with Bluetooth and app access for deeper history. The Airthings Wave Plus is more minimalist on-device, relying heavily on app connectivity and its indicator-style interface rather than a rich built-in display. Winner: SwitchBot, because it is the more immediately readable and less fussy option for quick checks in bedrooms, offices, and nurseries.

Performance

On core CO2 and humidity monitoring, both products do the job, but they serve different needs. SwitchBot focuses on CO2, temperature and humidity, with 2-year data storage and Bluetooth monitoring, and it can add WiFi through a SwitchBot Hub. That makes it very good for tracking whether a room needs airing out after sleep, a workout, or a closed-up day in a typical UK home. Airthings Wave Plus goes further with CO2, VOC, radon, air pressure, humidity and temperature, so it wins on breadth of sensing. If you care about radon exposure in a ground-floor room, basement, or older property, Airthings is the stronger performer overall. Winner: Airthings, because the extra sensors make it a more complete air-quality instrument.

Build quality and design

Airthings has the more premium reputation and a more polished, lifestyle-friendly design. It feels like a device intended to sit in a visible room for years, and the brand’s multi-sensor approach supports that premium positioning. SwitchBot is simpler and more utility-focused: it is built to be practical rather than decorative, which is not a bad thing if you want something unobtrusive on a shelf or bedside table. In terms of robustness and perceived quality, Airthings wins; in terms of simplicity and practicality, SwitchBot is fine but less premium. Winner: Airthings.

Battery life

Battery life is where the comparison becomes less about specs and more about usage. SwitchBot’s Bluetooth-first approach and optional hub connectivity can be very power-efficient in practice, and the lack of a constantly active advanced sensor suite helps keep it lean. Airthings Wave Plus is also known for long battery life in normal use, but its wider sensor set and always-on monitoring focus make it a more complex device. For users who want a low-maintenance monitor they can check occasionally, SwitchBot has the edge in simplicity. Winner: SwitchBot, because it is the easier, lighter-maintenance option for everyday household use.

Price and value for money

This is the biggest difference. SwitchBot costs £55.99, while Airthings Wave Plus costs £175.50, a gap of £119.51. For most buyers who mainly want to understand CO2 build-up, humidity, and temperature in a bedroom, home office, or child’s room, SwitchBot is much better value. Airthings only makes sense if you will actually use the radon and VOC data, or if you want a more comprehensive air-quality system and are happy to pay for it. Winner: SwitchBot, decisively, on pure value.

Game library/features

Interpreting this as features and ecosystem rather than literal games, Airthings is the richer product. It adds radon monitoring, VOC detection, and air pressure alongside the standard indoor comfort metrics, which is especially useful in UK homes where damp, ventilation, and older building stock can all affect indoor air quality. SwitchBot’s feature set is narrower but still highly relevant: CO2, temperature, humidity, Bluetooth monitoring, 2-year data storage, and WiFi via hub if you want remote access. If you want the most actionable health data, Airthings wins. If you want the most practical core feature set for the money, SwitchBot wins. Winner: Airthings.

Overall user experience

For most people, SwitchBot delivers the cleaner experience because it solves the common problem directly: “Is my room stale, and is humidity getting too high?” That is exactly what matters in UK winter months, during allergy season when windows stay shut, and in damp-prone bedrooms where condensation can creep up. Airthings is the better tool if you want a deeper indoor air profile and especially if radon is a concern in your property. But it is hard to ignore that it costs nearly three times as much. If you want a straightforward monitor that will actually get used, SwitchBot is the better buy. If you want the most complete environmental picture and are willing to pay for it, Airthings is the more advanced choice.

Overall summary: SwitchBot wins for most buyers because it offers the best balance of core performance, simplicity, and price. Airthings Wave Plus is the premium pick for people who specifically want radon and VOC monitoring, but for everyday UK household use, SwitchBot is the smarter purchase.