Taking the meaning of clean air to another level is the Dyson Pure Cryptomic Wi-Fi Air Purifiers. Using new technology from Dyson, these two air purifiers ensure your space is completely clean of formaldehyde. This might not be a pollutant you’re familiar with, but it could be in your home. When formaldehyde is present, it often irritates you. While some air purifiers simply trap this contaminant, the Dyson Cryptomic purifiers completely destroy it. These Dyson air purifiers are available in two models: Pure Cool and Pure Hot + Cool. The former Wi-Fi purifier creates only cold air, while the latter also doubles as a heater. If you use a space heater in the colder months, the heater and air purifier combination helps keep your air clean while warming you up.