In warfare, whoever opens fire first has a greater chance of victory.
We roasted chestnuts over an open fire.
With open-fire batteries for making the syrup, which was afterwards finished in the vacuum pan, very good sugar was produced, but at a cost that would be ruinous in to-day's markets.
An open fire acts by radiation; it warms the air in a room by first warming the walls, floor, ceiling and articles in the room, and these in turn warm the air.
Therefore in a room with an open fire the air is, as a rule, less heated than the walls.
Stoves were known, but most commonly heat was obtained from an open fire in the centre of the building.