Wood/ore ratio for small furnace July 2026

Hey peeps a lot of the info on the rust wiki sites are wrong. They talk about 3 stack. But now you can only have double stack.

A lot of guides talk about wood consumption per second and yield per second. But it's not clear if they mean yield per stack, or yield in total.

Just want to find out the numbers for full furnace.

1000 wood.. what unit double stack of metal/sulfer/hqm do I need to place.

Thanks for your help

edit. no point in using large furnaces as you need charcoal later. And I am in caves