[Answer] Which was NOT true of early pipeless furnaces?

Answer: whenever it is necessary….
Which was NOT true of early pipeless furnaces?

Round Oak was considered the finest heating stove money could buy because of the quality of its durable heating stove and by the late 1890s there were many “oak” …

Blast furnace – Wikipedia

Blast furnace – Wikipedia

Round Oak Stove Company – Wikipedia

Sloss Furnaces – Wikipedia

Open-hearth furnaces are one of several kinds of furnace in which excess carbon and other impurities are burnt out of pig iron to produce steel. Since steel is difficult to manufacture owing to its high melting point normal fuels and furnaces were insufficient and the open-hearth furnace …

A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals generally pig iron but also others such as lead or copper. Blast refers to the combustion air being “forced” or supplied above atmospheric pressure.. In a blast furnace fuel () ores and flux are continuously supplied through the top of the furnace …

Sloss Furnaces is a National Historic Landmark in Birmingham Alabama in the United States.It operated as a pig iron-producing blast furnace from 1882 to 1971. After closing it became one of the first industrial sites (and the only blast furnace …

Heat recovery ventilation (HRV) also known as…

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