#space_heater__spaceheater  heater consisting of a self-contained (usually portable) unit to warm a room
  supertype:  heater__warmer  device that heats water or supplies warmth to a room
  subtype:  electric_heater__electric_fire  a small electric space heater
     subtype:  heat_lamp__infrared_lamp  electric heater consisting of a high-power incandescent lamp that emits infrared radiation; "the bathroom could be warmed by an infrared lamp"

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