Furnace

A Furnace. Use it to smelt mined ore.

furnace

How to get it

Crafted
Worn by NPCs Builder, Survivor

Repair

At a repair bench, fully worn: 40 Stones, 20 Wood, 10 Low Grade Fuel. A half worn one costs half as much.

Condition lost per repair: None, it repairs to full forever
Blueprint needed: No

Rust stores no repair cost. The bench builds one from the crafting recipe: components are swapped for the first ingredient of their own recipe, then everything is charged at 20% and rounded up.

Recycling

Recycler	Returns	Time
Recycler50% back	100 Stones, 50 Wood, 25 Low Grade Fuel	5s
Barrel recycler40% back	80 Stones, 40 Wood, 20 Low Grade Fuel	8s
Powered recycler75% back	150 Stones, 75 Wood, 37 to 38 Low Grade Fuel	4s

A range means the last unit is a coin flip rather than a guarantee: half the recipe rarely divides evenly, and the recycler rolls for the remainder.

Stats

Category: Items
Stack size: 1
Durability: 100
Repairable: Yes
Research table: 10 scrap
Despawns after: 5 min
Decays: starts after 48h, gone 96h later
Item id: -1999722522
Has skins: Yes

No workbench · 30s · known by default

Total raw materials

What you actually have to farm, with every sub-component broken down.

Furnace has 500 health.

Cheapest way in

28 x Handmade Shell for 140 sulfur. No mix of tools beats it.

Cheapest explosive on its own: 9 x F1 Grenade for 540 sulfur, about 12s. That is what most raids actually run, because sulfur is not the only cost.

Raid tool	Amount	Time to raid	Raw materials	Sulfur
F1 GrenadeSplash 6m	9	12s	810 Charcoal, 540 Sulfur, 225 Metal Fragments	540
Satchel ChargeRight click stuckOne object only	2	14s	1,440 Charcoal, 960 Sulfur, 160 Metal Fragments	960
Satchel ChargeLeft click throwSplash 4m	2	14s	1,440 Charcoal, 960 Sulfur, 160 Metal Fragments	960
Beancan GrenadeSplash 4.5m	8	12s	1,440 Charcoal, 960 Sulfur, 160 Metal Fragments	960
Timed Explosive ChargeRight click stuckOne object only	1	11s	3,000 Charcoal, 2,200 Sulfur, 200 Metal Fragments	2,200
Timed Explosive ChargeLeft click throwSplash 4m	1	11s	3,000 Charcoal, 2,200 Sulfur, 200 Metal Fragments	2,200
High Velocity RocketSplash 3.5m	12	22s	3,600 Charcoal, 2,400 Sulfur, 240 Scrap	2,400
Propane Explosive BombDeployedSplash 4m	3	13s	4,050 Charcoal, 2,700 Sulfur, 300 Metal Fragments	2,700
RocketUsing RPG LauncherSplash 3.8m	2	6s	3,900 Charcoal, 2,800 Sulfur, 200 Metal Fragments	2,800
40mm HE GrenadeUsing Multiple Grenade LauncherSplash 4m	8	8s	8 40mm HE Grenade	-

A furnace has no soft side, so these are its only numbers. Times are exact for melee and for anything fired: swings times swing delay, or shots times fire rate plus the reloads that forces. For a charge you place by hand it is one second per charge plus the fuse, and that one second is the only estimate here. Melee tool counts assume fresh tools, because repairing lowers a tool's maximum condition each time and that rate is not in the files we read. Vanilla server settings, contact range, no distance falloff.

Values read from the Rust dedicated server files, build 24613624.