1) Convenient warmer 2) Portable source of warmth 3) Portable warmer 4) Portable warming device 
A space heater is a device for heating an enclosed area. Space heating is generally employed to warm a small space, and is usually held in contrast with central heating, which warms many connected spaces at once. Permanently installed space heaters may use electricity or burn natural gas, propane, fuel oil or wood pellets. For portable use electri...
A moveable or fixed heater used to heat individual rooms.
Type of heating equipment used in the living quarters
[n] - heater consisting of a self-contained (usually portable) unit to warm a room
noun heater consisting of a self-contained (usually portable) unit to warm a room
A movable or fixed heater used to heat individual rooms.