More Furnaces Furnace Types and Stats

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Each furnace differs in smelting speed, fuel consumption, and the number of input, output, and fuel slots it provides. Speed is shown relative to the vanilla furnace (1x = 200 ticks per item); lower tick counts are faster.

Furnace	Speed	Ticks/Item	Fuel Use	Input Slots	Output Slots	Fuel Slots
Netherrack	0.11x	1800	None	1	1	0
Copper	1.33x	150	1.25x	2	2	2
Iron	1.33x	150	1.25x	2	2	2
Silver	2x	100	1.75x	4	5	4
Gold	2.5x	80	2x	4	5	4
Obsidian	1.33x base	150	2x	2-4	2-4	2
Diamond	5x	40	4x	7	9	7

Higher tiers smelt faster and process more items per cycle, but most of them consume fuel more quickly than a vanilla furnace, so faster smelting comes at a higher fuel cost.