Beyond recording information about your home's microclimate, though, there's nothing the device can actually do with that data. The companion mobile app will tell you when your abode needs a proper airing if pollution surpasses a certain level, and can advise you on optimal humidity as well as the right temperature to keep toddlers comfortable. But for the most part, it provides the data and you provide the action.

If you're happy with that arrangement, the Healthy Home Coach launches worldwide today for $99, £99 or €99, depending on your region. It can be purchased directly from Netatmo's online store, or you can track it down at other retailers such as Amazon, Lowes, Best Buy and Home Depot.