Assertion: boiler's furnace | /r/Desires | natural draught
Facets:
Source sentences:
text: As the furnace relied on natural draught (air flow), a tall chimney was required at the far end of the flue to encourage a good supply of air (oxygen) to the fire.
text: As the furnace relied on natural draught, a tall chimney was required at the far end of the flue to encourage a good supply of air (oxygen) to the fire.