I recently bought a little Dyson upright vacuum. It’s sturdy and well-engineered, performs surprisingly well and is beautifully designed. I love using it. But it wasn’t exactly cheap. The Hot + Cool ceramic space heater/fan -– the latest in Dyson’s ‘air multiplier’ range -– carries much the same traits. For some, the Dyson name may be enough to convince your significant other. But others may just be wondering what the heck kind of tech begins to justify the $549 price tag. Let’s take a look.