Assertion: boiler's furnace | /r/CapableOf | use fan
Facets:
value: by comparison
type: MANNER
value: typically
type: DEGREE
value: to circulate air
type: PURPOSE
Source sentences:
text: By comparison, most modern "warm air" furnaces typically use a fan to circulate air to the rooms of house and pull cooler air back to the furnace for reheating; this is called forced-air heat.