Early and mid game furnace setup. To reach it max compressed output capacity must also provide a compressed lane of the ore you want, if you don't want to compress lanes just feed 2 to split. Just to know, it takes around 26 electric miners to full fill a yellow belt and 51 for red belt, both lanes.
- Outputs a compressed belt of its respective belt structure;
- Only uses normal inserters;
- Thin design easy to build manually, easily stackable and upgradable (yellow to red);
- Same or opposite input/output side;
- Almost perfect ratio besides an extra furnace for esthetic reasons (also keeps my OCD quiet).
I would say this is a simple solution, hope someone find it useful.
Observation: You can save some undergrounds on the red setup.