New furnaces, fitted for loaders using; the smelting speed is the same as transport belt; supports standard (yellow), fast and express belts and loaders.
Mods introducing new content into the game.
Furnaces, assembling machines, production chains.
...so what is this mod for?
There is no loaders in vanilla 0.13.19. And vanilla furnaces are not fitted for loaders using, they are too slow.