space heater

from WordNet (r) 3.0 (2006)

space heater
    n 1: heater consisting of a self-contained (usually portable)
         unit to warm a room

from The Collaborative International Dictionary of English v.0.48

space heater \space" heat`er\, n.
   a portable heating device used for warming the air of a
   single room; -- it may be electrical or use a combustible
   fuel.
   [PJC]