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Furnace

A Furnace. Use it to smelt mined ore.

The Furnace is a fuel-burning station in Rust with 500 health. It burns Wood, with 2 input and 3 output slots. You can craft it without a workbench, and its blueprint costs 10 scrap to research.

About the Furnace

Outside a tool cupboard's range it holds for 2 days, then decays from full health to nothing in 4 days.

How to raid the Furnace

Its cheapest raid is 2 × Satchel Charge, 960 sulfur in all. Each of these also brings it down from full health: 1 × Timed Explosive Charge and 2 × Rocket. That count assumes no duds, and a Satchel Charge fails to go off 20% of the time.

500HEALTH
6 slotsSTORAGE
2dDECAY DELAY
4dDECAYS IN
100%DROPS LOOT
WoodBURNS
2 in, 3 outSLOTS

How to craft the Furnace

Crafting one takes 15 seconds without a workbench and costs 200 × Stones, 100 × Wood and 50 × Low Grade Fuel.

Stones 200
Wood 100
Low Grade Fuel 50
Furnace
Output ×1
Workbench Not required
Craft time
NO WB 15s
WB1 −50% 7.5s
WB2 −75% 3.8s
WB3 −75% 3.8s

How to get the Furnace blueprint

Research it for 10 scrap at a Research Table.

Research table Burn one copy of the item for its blueprint
Item 1 Item
+
Scrap 10 Scrap
→
Blueprint Blueprint
Research cost 10

Repair when placed

A damaged Furnace can be repaired where it stands with a hammer. Repairing it from nothing to full costs:

Hammer Placed repair
×100 ×50 ×25

How to repair the Furnace

A full repair at a Repair Bench costs 41 × Stones, 21 × Wood and 11 × Low Grade Fuel, and you need its blueprint.

Repair bench Blueprint required
×41 ×21 ×11
Condition lost —

Stats checked against the Rust game files on 13 November 2026.