while great and amazing 746 units of production is in 3x3 is ... logistically it is not unless using the stacking infinite capacity researching for inserters

so all I ask is size info for the five stages of furnaces and if English is not your language of choice no big deal I am horrible at grammar and English is my default language (P.S. I cheat with Grammarly anyways)

The size of the furnaces 6x6 cells using Miniloader or LoaderRedux mods, you can load and unload items quickly enough. A stack of objects is stored from the furnace itself. The furnaces are expensive, and the study is also expensive, but by the end of the game, two level 5 furnaces were smelting copper and iron. Everywhere they are not advisable to put if you consider the cost of resources to create and the energy that they use, but at certain points it is possible.
In fact, the mod saves space.
I will make a description in more detail.
English through the translator), and then you have to make the most of the intuition to understand what he translated.

Added a more detailed description of the mod