Patent ID: 6959144

Claim:
A hot-air heater comprising: an air-blowing passage leading from an inlet to an outlet; an air-blowing fan and an electric heater provided along said air-blowing passage so that when said air-blowing fan is operated to suck air in said air-blowing passage through said inlet, said air is heated by said electric heater to provide hot air which is blasted out of said outlet to a room wherein: an expansion having an entrance opening and an exit opening is formed along said air-blowing passage as a storage portion to contain said electric heater; said electric heaters are arranged in a plurality of stages in such a manner as to face said entrance opening; and a distance between said entrance opening in said expansion and one of said electric heaters that has a highest wind speed at said entrance opening in said expansion of distances between said entrance opening in said expansion and said respective electric heaters is set larger.