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Furnace

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[edit]Furnace
Furnace.png
Furnace (Active).png
Furnace
Type

Solid Block

Requirements

None

Physics

No

Transparency

Partial (when active)

Luminance

Yes, 13 (when active)

Blast resistance

17.5

Hardness

3.5

Tool

A wooden pickaxe or better is required to mine this block

Renewable

Yes

Stackable

Yes (64)

Flammable

No

First appearance

Indev (February 19, 2010)

Tile Entity ID

Furnace

Data values
Inactive state
dec: 61 hex: 3D bin: 111101
Active state
dec: 62 hex: 3E bin: 111110
Name
Inactive state
furnace
Active state
lit_furnace

A Furnace (sometimes referred to as an oven) is used to heat blocks and turn them into other items. Furnaces are considered one of the fundamental blocks required to advance in Survival mode. Furnaces can naturally occur in villages.

Contents

[edit] Obtaining

[edit] Natural occurrence

Furnaces can be found inside villages. These naturally occurring furnaces are found in the blacksmith workshops, which contain two furnaces. They contain no fuel or smeltable materials.

[edit] Crafting

Ingredients Crafting recipe

Cobblestone

Cobblestone Cobblestone Cobblestone Grid layout Arrow (small).png Furnace
Cobblestone
Cobblestone
Cobblestone Cobblestone Cobblestone

[edit] Usage

Smelting Recipe

Grid layout Furnace Progress (in-active).png
Grid layout Fire (in-active).png

The furnace, when right-clicked, has its own menu where heating operations can be done. It consists of one field for the object that will be smelted, one field for the fuel and one field for the output object.

Wood, Wood Planks, coal, block of coal, charcoal, blaze rods and lava buckets are all fuels. Chests, crafting tables, bookshelves, sticks, saplings, jukeboxes, note blocks, locked chests, wooden pressure plates, wooden stairs, trapdoors and fences are also fuels, though none of them are very efficient. Each smelting operation takes 10 seconds.

Smelting will continue to work when the smelting menu is closed, as long as there are still objects to heat and there is enough fuel. The fire icon diminishes to represent the fuel burn time. When the fire icon diminishes fully, another fuel item is consumed and the heat is refilled. If all objects are smelted, the furnace will stop using additional fuel. The furnace will also stop if the output field contains a full stack, or if it contains a different item (e.g., trying to smelt gold ore with iron ingots in the output). If there is no fuel left, the furnace will become inactive. If a smelting process was running, it will be cancelled and must be redone.

Gold and iron ores can be smelted into ingots. Furnaces can also be used to smelt raw beef, raw porkchops, raw chicken, raw fish, raw salmon, and potatoes into their cooked variants.

When the items smelted in a furnace are collected, they drop experience orbs equal to the number of items in the stack. This makes furnaces a reliable (if slow) early source of experience.

Furnaces when active have a luminance of 13 and can provide light if you've run out of torches, and they can make charcoal for use in torches. Through this they can essentially be used as fireplaces (since there is no specific fireplace block currently in the game) by placing lots of long-lasting fuel items in it (lava buckets for an example), and then "lighting" the fireplace by placing a burnable item into it.

When holding ⇧ Shift, the player can place blocks like redstone, repeaters, levers and torches directly onto furnaces.

[edit] As a crafting ingredient

Name Ingredients Crafting recipe

Minecart with Furnace

Furnace +
Minecart




Grid layout Arrow (small).png Minecart with Furnace

Furnace

Minecart

[edit] Fuel efficiency

Sleeping while smelting/cooking items will not speed up the process.

Fuel Burning time
(seconds)
Number of
operations
per fuel
Amount to
light a furnace
all night
Seconds per
wood block (log)[fn 1]
Amount needed to
burn a stack (64) of items
Coal Coal 80 8 6.75 8
Charcoal Charcoal 80 8 6.75 23.7s to 80s[fn 2] 8
Oak WoodSpruce WoodBirch WoodJungle WoodDark Oak WoodAcacia Wood Wood 15 1.5 36 15s 43
Oak Wood PlanksSpruce Wood PlanksBirch Wood PlanksJungle Wood PlanksDark Oak Wood PlanksAcacia Wood Planks Wood Planks 15 1.5 36 60s 43
Oak Wood SlabSpruce Wood SlabBirch Wood SlabJungle Wood SlabDark Oak Wood SlabAcacia Wood Slab Wooden Slabs 7.5 0.75 72 60s 86
Oak SaplingSpruce SaplingBirch SaplingJungle SaplingDark Oak SaplingAcacia Sapling Saplings 5 0.5 108 128
Wooden PickaxeWooden ShovelWooden HoeWooden AxeWooden Sword Wooden Tools and Weapons 10 1 54 5s to 10s 64
Wooden Pressure Plate Wooden Pressure Plate 15 1.5 36 30s 43
Stick Stick 5 0.5 108 40s 128
Fence Fence 15 1.5 36 40s 43
Fence Gate Fence Gate 15 1.5 36 15s 43
Oak Wood StairsSpruce Wood StairsBirch Wood StairsJungle Wood StairsDark Oak Wood StairsAcacia Wood Stairs Wooden Stairs 15 1.5 36 40s 43
Trapdoor Trapdoor 15 1.5 36 20s 43
Crafting Table Crafting Table 15 1.5 36 15s 43
Bookshelf Bookshelf 15 1.5 36 10s 43
Chest Chest 15 1.5 36 7.5s 43
Trapped Chest Trapped Chest 15 1.5 36 6.9s 43
Daylight Sensor Daylight Sensor 15 1.5 36 40s 43
Jukebox Jukebox 15 1.5 36 7.5s 43
Note Block Note Block 15 1.5 36 7.5s 43
MushroomMushroom Huge Mushrooms 15 1.5 36 43
Blaze Rod Blaze Rod 120 12 4.5 5.3
Block of Coal Block of Coal 800 80 0.68 0.8
Lava Bucket Lava Bucket 1000 100 0.54 0.64
  1. This column is the unit-of-wood-equivalent. Calculation made once the fuel item is converted back to wood.
  2. This value is dependent upon the fuel used to smelt the wood. Using a trapped chest to produce one charcoal produces the lower number, while using a fuel that does not consume wood, such as saplings or lava, produces the higher number. Using charcoal as the fuel gives a figure of 70s per wood block since the player will obtain 7 additional charcoal for each 8 wood consumed.

[edit] Tips and tricks

  • A single lava bucket will allow for smelting of 100 items. The largest stack is 64. Considering that each smelting operation takes 10 seconds, to maximize the efficiency of a lava bucket, place a lava bucket with 64 unsmelted items and return between 6 minutes and 10 minutes 40 seconds later to remove 36 smelted items and insert 36 more unsmelted items. You can also use a hopper on top of the furnace.
  • Because lava can smelt 100 items, you can save coal and wood by using lava buckets as your source and smelting in the Nether near a lava ocean.
  • For a large project, you can use more than one furnace, it is not uncommon to see a wall of furnaces near a large project, not used all the time, but to reduce the amount of time it takes to smelt a large number of items. When working at this scale, the most efficient fuel would be coal (or charcoal). The most efficient method is to use about 16-32 furnaces and use 4 coal/charcoal for fuel and 32 of the blocks that need to be smelted. This can convert an entire inventory's worth of resources in the timespan of around 10 minutes. Blaze rods may be a reasonable alternative, a by-product of blaze experience farms, though note that if done on the site of a blaze farm, they must be protected from Ghasts as they are not sufficiently blast resistant to survive a Ghast's fireball.
  • Since all types of logs burn for the same amount of time as wooden planks, converting logs to planks is a quick and easy way to quadruple the burning time (instead of 16 logs burning for 240 seconds. Converting them to 64 planks would burn for 960 seconds, however, converting 16 logs to charcoal using 2 charcoal from previously cooked logs will have a net burn time of 1,120 seconds, even if one log is converted to wood planks.
  • Smelting can be a tedious task, especially when you have a load of items to smelt, put in and take out. See Tutorials/Automatic Smelter.

[edit] Achievements

Icon Achievement In-game description Prerequisites Actual requirements (if different) Version restriction Xbox points earned Trophy type (PS)
Achievement-plain.png
Grid Furnace.png
Hot Topic Construct a furnace out of eight stone blocks Time to Mine! Pick up a Furnace from a Crafting Table output. The description has the wrong recipe; furnaces are actually crafted from Cobblestone. None 15G Bronze

[edit] Video

[edit] History

Indev
Prior to the addition of furnaces,[1] the player started with a bunch of TNT and Flint and Steel. Items could be smelted by dropping them on the ground and then burning them with flint and steel. This was the only way to smelt ores.
February 19, 2010 Furnace added.
February 23, 2010 The first smeltable item is cobblestone, which can be smelted into smooth stone.
Alpha
1.2.0 Furnaces will face towards the player when placed.[2] Before the update, they faced away when placed.
Beta
1.2 The top of furnaces have a texture similar to cobblestone. They used to have a texture exactly the same as stone.
1.8 You can now cook up to 64 pieces of food at a time.[3] Since food can stack, it's possible to cook them like any other item. Before 1.8, the player could only cook 1 piece of food at a time (e.g. a single Porkchop).
Official release
1.0.0 1.9pre1 Furnaces do not take as long to destroy.
1.2.4 Cats will try to sit on active furnaces, making them unusable. This is only meant to annoy the player.
1.2.5 1.2.5pre Shift+clicking can be used to put items into furnaces more easily.
1.3.1 12w18a Wooden tools work in furnaces as one full furnace use.
12w22a Smelting various ores in furnaces now rewards players with experience points.
When using lava for fuel you get the bucket back.
1.4.2 12w39a Previously, furnaces lit up blocks all around them, this snapshot made furnaces light up blocks only in front of them.[4] (images showing difference) Its light value remained 13, but the light is only emitted from the block's front surface.
12w40a The previous change was reverted until the new lighting system could be optimized.
1.4.6 12w49a When holding sneak, the player can place blocks and items (like redstone, repeaters, and levers) directly onto furnaces.
1.5 13w01a Added a Hopper block, which can place and take out items from furnaces.
13w02a Furnaces renamed using an anvil will display the new name in their GUI where the normal name used to appear.
Upcoming
1.8 14w02a When a furnace runs out of fuel, the smelting progress will pause instead of resetting.
14w04a When a furnace runs out of fuel, the smelting progress will now reverse at twice the speed of smelting.
14w26a Furnaces allow only fuel or a single empty bucket in the fuel slot.
Pocket Edition Alpha
0.3.2 Furnaces added, meaning that every available block and item can now be gathered, crafted or smelted into. (no more unlimited items).
0.9.0 build 1 Furnaces now naturally spawn in villages.
Console Edition
TU1 Added furnaces.
TU12 Cats will try to sit on active furnaces, making them unusable. This is only meant to annoy the player.
TU14 Wooden tools work in furnaces as one full furnace use.
When using lava for fuel you get the bucket back.
Pi Edition
0.1.1 Added furnaces, although they cannot be used to smelt items.

[edit] Issues

Issues relating to "Furnace" are maintained on the issue tracker. Report issues there.

[edit] Trivia

  • Furnaces function as multiple devices combined into one block. Furnaces are really Bloomeries and blast furnaces (for smelting ores), an oven (for baking and cooking), a charcoal pit (for the charring of wood) and a kiln (for baking of clay).
  • Furnaces can be used as an early-game XP farm, but on the one hand cobblestone, food, etc. don't give much XP, on the other, it will take a while to produce the materials for an Enchantment Table. Later, smelting accumulated ores etc. becomes a way to controllably gain experience in fair-sized chunks; a stack of iron gives 45 XP, while a stack of gold gives 64 XP.
  • Furnaces can be used for BUD Switches by placing a fuel and burnable item, making it become an on-state furnace.
  • Furnaces can also be used as a long timer using a BUD switch because each item burns for 10 seconds with a max of 64 items you can make a timer for 10 minutes and 40 seconds depending on the fuel source used and if you use lava you can get 16 minutes and 40 seconds and with a hopper you can make it much longer.
  • The furnace is featured in the "Hot Topic" achievement and is required for the "Acquire Hardware" and "Delicious Fish" achievements, because you need to smelt iron and cook fish for those achievements.
  • Before the furnace appeared, smelting was accomplished by creating a fire and dropping the ores into it. Furnaces are currently available in all versions of Minecraft except for Classic.

[edit] Gallery

[edit] See also

[edit] References