The Pure Hot+Cool Link purifier heater by Dyson(R) has triple functionality. As a purifier, it removes 99.97% of allergens from your home. As a heater or cooling fan, it lets you select personal mode for a powerful stream of focused air, or diffused mode for wide projection. The filter's carbon layer traps odours, from cooking smells to paint fumes. The product is backed by a 2-year warranty.