Furnaces Galore

This mod adds a few new furnaces to the game. Each tier is made of a different material, and each tier is faster than the previous one (the speedups are configurable in a config file). The later tiers are more expensive the make though (not only are the materials more scarce, you also need a furnace of the previous tier).

The goodies

We've got:

copper furnace: (default, but configurable) speedup 1.5 times
iron furnace: speedup 2.1 times
gold furnace: speedup 3.3 times
diamond furnace: speedup 5.5 times
netherite furnace: speedup 10 times

The downside of the furnaces being faster is that they burn through fuel a lot faster. To solve this, the mod also adds a Furnace Catalyst item that improves fuel efficiency, causing the furnaces to be more efficient. The gains from this are greater for the later tiers.