Rust Furnace Guide 2022

The September 2022 update replaced the old furnace/cooking UI with a new UI. It is much easier to cook but I wanted to make a guide to help folks waste less wood and give some basic information.

Rust Furnace Guide 2022

New UI will NOT cook more then 1 slot of input at once. If you have 5 metal ore in the first slot and 10 in the second slot of a large furnace it will take 10 wood to cook.

Burnt wood has an 75% chance of giving a charcoal as an output

Small Furnace

• burns 3 ore per action
• 1 action per 5 sec for sulfur or 10 sec for metal
• burns 1 wood every 2 sec
• 2 slots for ore
• 1 slot for wood
• 3 outputs
• wood limited

1000 wood cooks 600 metal ore
1000 wood cooks 1198 sulfur ore (or 1200 if placed 999, 201)

non-full wood estimates
metal ore divided by 0.6 (or times 1.666) rounded up to the nearest 5
sulfur ore divided by 1.2 (or times 0.833) rounded up to the nearest 3, 5, 8, or 10

Large Furnace

• burns 15 ore per action
• 1 action per 5 sec for sulfur or 10 sec for metal
• burns 1 wood every 2 sec
• 5 slots for ore
• 2 slot for wood
• 10 outputs
• ore limited

5000 metal ore needs 1675 wood (55 min 50 sec)
5000 sulfur ore needs 838 wood (27 min 56 sec)
900 high quality need 600 wood (20 mins)

non-full wood estimates
metal ore divided by 3 (or times 0.333) rounded up to the nearest 5
sulfur ore divided by 6 (or times 0.1666) rounded up to the nearest 5
high quality ore divided by 1.5 (or times 0.666) rounded up to the nearest 10

Oil Refinery

• burns 3 per action (and 1 crude turns into 3 low grade)
• 1 action per 10 sec
• burns 1 wood every 1.5 sec
• 1 slot for oil
• 1 slot for wood
• 3 outputs
• output limited

740 wood refines 333 crude (18 min 30 sec)

non-full wood estimates

crude divided by 0.45 rounded up to the nearest 10

Barbeque

• cooks up to 8 at once
• will not cook more then 1 slot of food at once
• 30 sec per action for meat & empty cans or 20 sec per action for fish
• burns 1 wood every 10 sec
• 3 slots for cooking
• 1 slot for wood
• 4 outputs
• cooked food WILL burn IF it is in the FIRST output slot AFTER all raw is cooked (charcoal in first OUTPUT will prevent burning)

27 wood cooks 60 bear meat OR 18 wood cooks 16, 16, 16 (48 meat, 20% more meat per wood OR faster cooking time)

Campfire/Fireplace

• Campfire cooks 2 per action, Fireplace cooks 1 per action
• burns 1 wood every 10 sec
• 1 slots for cooking
• 1 slots for wood
• 1(2??) output (some servers have 1 output which makes it unable to cook due to lack of enough outputs [charcoal but no cookables])