Blueair 3-in-1 purifier, fan and heater drops to £237 in Amazon sale

TechRadar says the model can warm a small- to medium-sized room in colder months, work as a cooling fan during summer heatwaves, and filter dirt and allergens from the air all year round. The same three-in-one fan heater and purifier has also received a $180 discount in the US, according to the article, though it says stock is limited.

The article cites reviewer Becca Caddy, who said, "One feature I particularly liked was the way the purifier automatically ramped up when air quality dropped and then settled back down once conditions improved." She added, "It meant the unit never felt like it needed to run at full power all the time." TechRadar presents that automatic behavior as useful in light of fuel costs and the Prime Day discount.

The unit can be operated by an app or a remote, according to the article. It has a top-mounted control panel and can be linked to Amazon Alexa for voice control through an Amazon Echo speaker, TechRadar says. The app can adjust settings, set schedules and activate the device based on the user's location, so a room can be heated or cooled before arrival, the publication reports.

TechRadar also notes an anti-tip sensor that switches the unit off automatically if it is knocked over. It describes the device's off-white color and minimal styling as suitable for a home office, kitchen or bedroom. The article refers to the T10i and says the main drawback had been the price, but with this pre-Prime Day deal it is no longer an issue.