The only air purifier, heater & fan to clean a whole room properly To simultaneously purify and heat a whole room properly, the Dyson Pure Hot+Cool™ HEPA Air Purifier, Heater & Fan goes beyond standard tests by automatically sensing pollution, capturing ultrafine pollutants, and projecting purified and heated air using Air Multiplier™ technology. It is the only purifying heater designed and tested to do this.