Board Thread:Tutorials/@comment-99.73.117.63-20130527151123/@comment-5627887-20130602174639

Yiazzy wrote: The iron-efficient way of making a Generator, is to use a normal furnace with a machine block, only requiring 8 iron to be smelted. The way with the Iron Furnace takes 11 iron in total, 8 normal and 3 refined.

Not necessarily; you can also craft an Iron Furnace from a normal furnace and 5 iron ingots. In fact, the most efficient way to craft generators is by crafting from iron furnaces (made in the more iron-efficient way) thereby using a total of 8 iron, and only 3 of that 8 needs to be refined. This saves you smelting 5 iron each time, which is a small amount but adds up over time, and plus if you're trying to be efficient you might as well be as efficient as possible.