A heated air system may include a heater/blower device, hose, and nozzle for blowing and heating air. The nozzle may be adapted and shaped for treatment of an ectoparasite infestation on an animal or person. Methods of treatment of an ectoparasite infestation may include applying a product to the hair to kill or slow hatched ectoparasites, combing out all the hatched ectoparasites, and heating air and applying heated air to a portion of the animal or persons body being treated to dehydrate any eggs and/or ectoparasites on the body.
