Settings: 10

Keeping air flowing around the room is all good and well, but if you live by a busy street, you run the risk of bringing unwelcome pollutants to your space too.

Enter Dyson, long the leader when it comes to smart home electricals, and it’s Dyson Purifier HEPA Cool Formaldehyde purifying fan which not only cools warm air, but ‘washes’ it of nasty particles like formaldehyde (emitted from household paint, varnishes and printers), nitrogen dioxide (caused by road traffic, tobacco and fuel-burning heaters), PM10 particles from pollen and allergens (a godsend for hayfever sufferers and asthmatics) and general household odours (think cooking, pets and kids).

It comes with a magnetic remote control, which can sit happily atop the unit, but can also be controlled through your phone’s Dyson Link app via Bluetooth. There are 10-speed settings, and it propels cool air into the room using its patented air multiplier technology.

The smartest thing of all is that it continually detects dust, allergens, mould and formaldehyde particles in the room, before trapping them into high-performance filters that never need replacing. So, while it’s expensive, buying new filters is one cost you won’t have to factor in past the initial purchase of the machine.