When Dyson isn't turning its R&D-heavy hand to new interests, it likes to go about improving upon existing products. Case in point: the new "Pure Hot + Cool," which combines Dyson's bladeless fan, heater and air purification technologies into the one device. Like Dyson's "Pure Cool" bladeless fan, this shorter model can filter even the tiniest of particles (as small as 0.1 microns), including bacteria, mould and pollen, with a 99.95 percent success rate. Furthermore, the glass HEPA filter hidden in the base of the tower should last over a year, even with daily use. Apart from the size of the thing, the new product only differs in that it can also heat up a room, and not just keep it cool using Dyson's fancy "Air Multiplier" tech.