I happen to live in what must be some of the most polluted air in London. It smells OK, but it’s filthy. We clean the hardwood floors daily with a Swiffer (the simple all-American mop and broom cleaning system that’s never quite taken off in the UK), and after a normal day’s activity – especially with the windows open – the Swiffer pad is so black with dirt it’s as if we’d been cooking inside on an open fire. So this summer I spent some time testing Dyson’s Pure Cool Link air purifier, a 1,018mm-tall, oversize version of the brand’s many bladeless fans that not only moves air about prodigiously, but filters it as it goes.
The technology is, in typical Dysonian fashion, what my dad would have called belt and braces, removing 99.95 per cent of airborne particles, including those as small as 0.1 microns. The filtering process comprises an active carbon filter (like a cooker hood’s) to absorb smells and chemicals, plus a barrier, pleated like a car’s air filter, of borosilicate (glass) microfibres to catch everything from pollen to the most Lilliputian of dust. And the effect has been dramatic; even with our windows open, the Cool Link has cut down debris on the Swiffer pads by 80 to 90 per cent. The app, which wirelessly monitors the purifier’s operation and supplies interesting data on pollution levels, confirms that our air is bad and worst in the middle of the day.
Dyson has now released this stumpier Pure Hot & Cool Link, which does the same but can also warm the air in the room – and it took me just a few hours to decide to install one in my often chilly home office before winter sets in. I frequently spend 12 hours at a stretch in there and the idea of being comfortable year-round while also breathing filtered air rather than dirt soup is a revelation (Dyson doesn’t specify a room size limit for either the Hot & Cool Link or the larger Cool-only version, but the latter seems to do fine even in a big room; I suspect only a ballroom would defeat it). And if you’re curious to know more, Dyson’s new London store is not only stuffed with informed experts but it is also on Oxford Street – infamous for officially having some of the most-polluted air in the city.