space heater 
noun
A self-contained appliance for heating an enclosed space within a building.Let's assume that nothing else in the house is on, so the meter is measuring only the electricity used by the space heater....
- A space heater in an enclosed area can provide the needed heat for curing.
- It was freezing cold outside and there was no heat in the garage, so he had a little space heater over by his side and I had a blanket that he graciously gave me to drape around my shoulders like a Navajo Indian.
Derivatives
space-heated
- Garages all over America could be converted to space-heated cabins large enough to accommodate six.
space heating
- It features solar panels used to generate electricity, passive solar space heating, solar water heating, and a water catchment system (which collects and filters rain-water for household use).
- 75% of household energy use goes on water and space heating, and due to the poor quality of our housing stock, most of this is simply wasted.
- Since use of electricity for space heating has shown a general decline, ‘lights and appliances’ explain much of the increase in share and overall use.