Assertion: portable space heater | /r/HasProperty | electric
Facets:
value: usually
type: DEGREE
Source sentences:
text: Portable space heaters are usually electric, because a permanent exhaust is needed for heaters which burn fuel.
text: Now, the standard portable space heaters that you see most often in stores are electric ones.
text: Portable space heaters for bedrooms are usually electric, and use 1,500 watts of power.