diff --git a/TrueCraft.API/Logic/IBurnableItem.cs b/TrueCraft.API/Logic/IBurnableItem.cs
new file mode 100644
index 0000000..1c0d681
--- /dev/null
+++ b/TrueCraft.API/Logic/IBurnableItem.cs
@@ -0,0 +1,15 @@
+using System;
+
+namespace TrueCraft.API.Logic
+{
+    /// <summary>
+    /// Describes an item that can be burnt as fuel in a furnace.
+    /// </summary>
+    public interface IBurnableItem
+    {
+        /// <summary>
+        /// The duration of time this item can act as fuel.
+        /// </summary>
+        TimeSpan BurnTime { get; }
+    }
+}
\ No newline at end of file
diff --git a/TrueCraft.API/Logic/ISmeltableItem.cs b/TrueCraft.API/Logic/ISmeltableItem.cs
new file mode 100644
index 0000000..1c02b5b
--- /dev/null
+++ b/TrueCraft.API/Logic/ISmeltableItem.cs
@@ -0,0 +1,15 @@
+using System;
+
+namespace TrueCraft.API.Logic
+{
+    /// <summary>
+    /// Describes an item that can be smelted in a furnace to produce a new item.
+    /// </summary>
+    public interface ISmeltableItem
+    {
+        /// <summary>
+        /// The item this becomes when smelted.
+        /// </summary>
+        ItemStack SmeltingOutput { get; }
+    }
+}
\ No newline at end of file
diff --git a/TrueCraft.API/TrueCraft.API.csproj b/TrueCraft.API/TrueCraft.API.csproj
index df50c42..34fa688 100644
--- a/TrueCraft.API/TrueCraft.API.csproj
+++ b/TrueCraft.API/TrueCraft.API.csproj
@@ -122,6 +122,8 @@
     <Compile Include="Physics\IPhysicsEngine.cs" />
     <Compile Include="Physics\IPhysicsEntity.cs" />
     <Compile Include="Physics\IAABBEntity.cs" />
+    <Compile Include="Logic\ISmeltableItem.cs" />
+    <Compile Include="Logic\IBurnableItem.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup />
diff --git a/TrueCraft.API/Windows/IWindow.cs b/TrueCraft.API/Windows/IWindow.cs
index 58912dc..abf56f9 100644
--- a/TrueCraft.API/Windows/IWindow.cs
+++ b/TrueCraft.API/Windows/IWindow.cs
@@ -1,4 +1,5 @@
 using System;
+using TrueCraft.API.Networking;
 
 namespace TrueCraft.API.Windows
 {
@@ -6,6 +7,7 @@ namespace TrueCraft.API.Windows
     {
         event EventHandler<WindowChangeEventArgs> WindowChange;
 
+        IRemoteClient Client { get; set; }
         IWindowArea[] WindowAreas { get; }
         sbyte ID { get; set; }
         string Name { get; }
diff --git a/TrueCraft.Core/Logic/Blocks/FurnaceBlock.cs b/TrueCraft.Core/Logic/Blocks/FurnaceBlock.cs
index 86da822..6fccbb0 100644
--- a/TrueCraft.Core/Logic/Blocks/FurnaceBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/FurnaceBlock.cs
@@ -3,6 +3,13 @@ using TrueCraft.API.Logic;
 using TrueCraft.API;
 using TrueCraft.API.Networking;
 using TrueCraft.API.World;
+using TrueCraft.Core.Windows;
+using TrueCraft.API.Windows;
+using System.Collections.Generic;
+using fNbt;
+using TrueCraft.API.Server;
+using TrueCraft.Core.Networking.Packets;
+using TrueCraft.Core.Entities;
 
 namespace TrueCraft.Core.Logic.Blocks
 {
@@ -20,6 +27,123 @@ namespace TrueCraft.Core.Logic.Blocks
 
         public override string DisplayName { get { return "Furnace"; } }
 
+        protected override ItemStack[] GetDrop(BlockDescriptor descriptor, ItemStack item)
+        {
+            return new ItemStack[] { new ItemStack(BlockID) };
+        }
+
+        public override void BlockMined(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user)
+        {
+            var entity = world.GetTileEntity(descriptor.Coordinates);
+            if (entity != null)
+            {
+                foreach (var item in (NbtList)entity["Items"])
+                {
+                    var manager = user.Server.GetEntityManagerForWorld(world);
+                    var slot = ItemStack.FromNbt((NbtCompound)item);
+                    manager.SpawnEntity(new ItemEntity(descriptor.Coordinates + new Vector3(0.5), slot));
+                }
+                world.SetTileEntity(descriptor.Coordinates, null);
+            }
+            base.BlockMined(descriptor, face, world, user);
+        }
+
+        public override bool BlockRightClicked(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user)
+        {
+            var window = new FurnaceWindow(user.Server.Scheduler, descriptor.Coordinates,
+                user.Server.ItemRepository, (InventoryWindow)user.Inventory);
+
+            var entity = world.GetTileEntity(descriptor.Coordinates);
+            if (entity != null)
+            {
+                int i = 0;
+                foreach (var item in (NbtList)entity["Items"])
+                {
+                    var slot = ItemStack.FromNbt((NbtCompound)item);
+                    window[i++] = slot;
+                }
+            }
+
+            user.OpenWindow(window);
+
+            if (entity != null)
+            {
+                var burnTime = entity["BurnTime"].ShortValue;
+                var burnTotal = entity["BurnTotal"].ShortValue;
+                var cookTime = entity["CookTime"].ShortValue;
+                var burnProgress = (short)(((double)burnTime / burnTotal) * 250);
+                if (burnTime == 0)
+                    burnProgress = 0;
+                if (cookTime != 0)
+                    window.Client.QueuePacket(new UpdateProgressPacket(window.ID,
+                        UpdateProgressPacket.ProgressTarget.ItemCompletion, cookTime));
+                if (burnProgress != 0)
+                    window.Client.QueuePacket(new UpdateProgressPacket(window.ID,
+                            UpdateProgressPacket.ProgressTarget.AvailableHeat, burnProgress));
+            }
+
+            window.WindowChange += (sender, e) => FurnaceWindowChanged(sender, e, world);
+            return false;
+        }
+
+        private bool Handling = false;
+
+        private NbtCompound CreateTileEntity()
+        {
+            return new NbtCompound(new NbtTag[]
+            {
+                new NbtShort("BurnTime", 0),
+                new NbtShort("BurnTotal", 0),
+                new NbtShort("CookTime", 20),
+                new NbtList("Items", new[]
+                {
+                    ItemStack.EmptyStack.ToNbt(),
+                    ItemStack.EmptyStack.ToNbt(),
+                    ItemStack.EmptyStack.ToNbt()
+                }, NbtTagType.Compound)
+            });
+        }
+
+        protected void FurnaceWindowChanged(object sender, WindowChangeEventArgs e, IWorld world)
+        {
+            if (Handling)
+                return;
+            var window = sender as FurnaceWindow;
+            var index = e.SlotIndex;
+            if (index >= FurnaceWindow.MainIndex)
+                return;
+
+            Handling =  true;
+            window[index] = e.Value;
+
+            var entity = world.GetTileEntity(window.Coordinates);
+            if (entity == null)
+                entity = CreateTileEntity();
+
+            entity["Items"] = new NbtList("Items", new NbtTag[]
+            {
+                window[0].ToNbt(), window[1].ToNbt(), window[2].ToNbt()
+            }, NbtTagType.Compound);
+
+            world.SetTileEntity(window.Coordinates, entity);
+
+            UpdateFurnaceState(window.EventScheduler, world, entity, window.ItemRepository, window.Coordinates, window, TimeSpan.Zero);
+
+            Handling = false;
+        }
+
+        private void UpdateFurnaceState(IEventScheduler scheduler, IWorld world, NbtCompound tileEntity,
+                                        IItemRepository itemRepository, Coordinates3D coords, FurnaceWindow window, TimeSpan elapsed)
+        {
+            if (world.GetBlockID(coords) != FurnaceBlock.BlockID && world.GetBlockID(coords) != LitFurnaceBlock.BlockID)
+            {
+                if (window != null && !window.IsDisposed)
+                    window.Dispose();
+                return;
+            }
+            // TODO
+        }
+
         public override Tuple<int, int> GetTextureMap(byte metadata)
         {
             return new Tuple<int, int>(13, 2);
diff --git a/TrueCraft.Core/Logic/Blocks/IronOreBlock.cs b/TrueCraft.Core/Logic/Blocks/IronOreBlock.cs
index 7fb28df..6f3ff44 100644
--- a/TrueCraft.Core/Logic/Blocks/IronOreBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/IronOreBlock.cs
@@ -1,10 +1,11 @@
 using System;
 using TrueCraft.API.Logic;
 using TrueCraft.API;
+using TrueCraft.Core.Logic.Items;
 
 namespace TrueCraft.Core.Logic.Blocks
 {
-    public class IronOreBlock : BlockProvider
+    public class IronOreBlock : BlockProvider, ISmeltableItem
     {
         public static readonly byte BlockID = 0x0F;
         
@@ -38,5 +39,7 @@ namespace TrueCraft.Core.Logic.Blocks
                 return ToolType.Pickaxe;
             }
         }
+
+        public ItemStack SmeltingOutput { get { return new ItemStack(IronIngotItem.ItemID); } }
     }
 }
\ No newline at end of file
diff --git a/TrueCraft.Core/Logic/Items/CoalItem.cs b/TrueCraft.Core/Logic/Items/CoalItem.cs
index fa30aba..dabe0c8 100644
--- a/TrueCraft.Core/Logic/Items/CoalItem.cs
+++ b/TrueCraft.Core/Logic/Items/CoalItem.cs
@@ -3,7 +3,7 @@ using TrueCraft.API.Logic;
 
 namespace TrueCraft.Core.Logic.Items
 {
-    public class CoalItem : ItemProvider
+    public class CoalItem : ItemProvider, IBurnableItem
     {
         public static readonly short ItemID = 0x107;
 
@@ -15,5 +15,7 @@ namespace TrueCraft.Core.Logic.Items
         }
 
         public override string DisplayName { get { return "Coal"; } }
+
+        public TimeSpan BurnTime { get { return TimeSpan.FromSeconds(80); } }
     }
 }
\ No newline at end of file
diff --git a/TrueCraft.Core/Networking/Packets/UpdateProgressPacket.cs b/TrueCraft.Core/Networking/Packets/UpdateProgressPacket.cs
index e63c5ef..317bcc7 100644
--- a/TrueCraft.Core/Networking/Packets/UpdateProgressPacket.cs
+++ b/TrueCraft.Core/Networking/Packets/UpdateProgressPacket.cs
@@ -16,6 +16,13 @@ namespace TrueCraft.Core.Networking.Packets
 
         public byte ID { get { return 0x69; } }
 
+        public UpdateProgressPacket(sbyte windowID, ProgressTarget target, short value)
+        {
+            WindowID = windowID;
+            Target = target;
+            Value = value;
+        }
+
         public sbyte WindowID;
         public ProgressTarget Target;
         /// <summary>
diff --git a/TrueCraft.Core/TrueCraft.Core.csproj b/TrueCraft.Core/TrueCraft.Core.csproj
index e60e235..71d0ded 100644
--- a/TrueCraft.Core/TrueCraft.Core.csproj
+++ b/TrueCraft.Core/TrueCraft.Core.csproj
@@ -352,6 +352,7 @@
     <Compile Include="AI\WanderState.cs" />
     <Compile Include="Physics\PhysicsEngine.cs" />
     <Compile Include="Entities\WolfEntity.cs" />
+    <Compile Include="Windows\FurnaceWindow.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>
diff --git a/TrueCraft.Core/Windows/FurnaceWindow.cs b/TrueCraft.Core/Windows/FurnaceWindow.cs
new file mode 100644
index 0000000..537442f
--- /dev/null
+++ b/TrueCraft.Core/Windows/FurnaceWindow.cs
@@ -0,0 +1,144 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using TrueCraft.API.Windows;
+using TrueCraft.API.Logic;
+using TrueCraft.API;
+using TrueCraft.API.Server;
+
+namespace TrueCraft.Core.Windows
+{
+    public class FurnaceWindow : Window
+    {
+        public IItemRepository ItemRepository { get; set; }
+        public IEventScheduler EventScheduler { get; set; }
+        public Coordinates3D Coordinates { get; set; }
+        
+        public FurnaceWindow(IEventScheduler scheduler, Coordinates3D coordinates,
+            IItemRepository itemRepository, InventoryWindow inventory)
+        {
+            ItemRepository = itemRepository;
+            EventScheduler = scheduler;
+            Coordinates = coordinates;
+
+            WindowAreas = new[]
+                {
+                    new WindowArea(IngredientIndex, 1, 1, 1),
+                    new WindowArea(FuelIndex, 1, 1, 1),
+                    new WindowArea(OutputIndex, 1, 1, 1),
+                    new WindowArea(MainIndex, 27, 9, 3),
+                    new WindowArea(HotbarIndex, 9, 9, 1)
+                };
+            inventory.MainInventory.CopyTo(MainInventory);
+            inventory.Hotbar.CopyTo(Hotbar);
+            foreach (var area in WindowAreas)
+                area.WindowChange += (s, e) => OnWindowChange(new WindowChangeEventArgs(
+                    (s as WindowArea).StartIndex + e.SlotIndex, e.Value));
+            Copying = false;
+            inventory.WindowChange += (sender, e) =>
+            {
+                if (Copying) return;
+                if ((e.SlotIndex >= InventoryWindow.MainIndex && e.SlotIndex < InventoryWindow.MainIndex + inventory.MainInventory.Length)
+                    || (e.SlotIndex >= InventoryWindow.HotbarIndex && e.SlotIndex < InventoryWindow.HotbarIndex + inventory.Hotbar.Length))
+                {
+                    inventory.MainInventory.CopyTo(MainInventory);
+                    inventory.Hotbar.CopyTo(Hotbar);
+                }
+            };
+        }
+
+        private bool Copying { get; set; }
+
+        public const int IngredientIndex = 0;
+        public const int FuelIndex = 1;
+        public const int OutputIndex = 2;
+        public const int MainIndex = 3;
+        public const int HotbarIndex = 30;
+
+        public override string Name
+        {
+            get
+            {
+                return "Furnace";
+            }
+        }
+
+        public override sbyte Type
+        {
+            get
+            {
+                return 2;
+            }
+        }
+
+        public override IWindowArea[] WindowAreas { get; protected set; }
+
+        public IWindowArea Ingredient 
+        {
+            get { return WindowAreas[0]; }
+        }
+
+        public IWindowArea Fuel
+        {
+            get { return WindowAreas[1]; }
+        }
+
+        public IWindowArea Output
+        {
+            get { return WindowAreas[2]; }
+        }
+
+        public IWindowArea MainInventory
+        {
+            get { return WindowAreas[3]; }
+        }
+
+        public IWindowArea Hotbar
+        {
+            get { return WindowAreas[4]; }
+        }
+
+        public override ItemStack[] GetSlots()
+        {
+            var relevantAreas = new[] { Ingredient, Fuel, Output };
+            int length = relevantAreas.Sum(area => area.Length);
+            var slots = new ItemStack[length];
+            foreach (var windowArea in relevantAreas)
+                Array.Copy(windowArea.Items, 0, slots, windowArea.StartIndex, windowArea.Length);
+            return slots;
+        }
+
+        public override void CopyToInventory(IWindow inventoryWindow)
+        {
+            var window = (InventoryWindow)inventoryWindow;
+            Copying = true;
+            MainInventory.CopyTo(window.MainInventory);
+            Hotbar.CopyTo(window.Hotbar);
+            Copying = false;
+        }
+
+        protected override IWindowArea GetLinkedArea(int index, ItemStack slot)
+        {
+            if (index < MainIndex)
+                return MainInventory;
+            return Hotbar;
+        }
+
+        public override bool PickUpStack(ItemStack slot)
+        {
+            var area = MainInventory;
+            foreach (var item in Hotbar.Items)
+            {
+                if (item.Empty || (slot.ID == item.ID && slot.Metadata == item.Metadata))
+                    //&& item.Count + slot.Count < Item.GetMaximumStackSize(new ItemDescriptor(item.Id, item.Metadata)))) // TODO
+                {
+                    area = Hotbar;
+                    break;
+                }
+            }
+            int index = area.MoveOrMergeItem(-1, slot, null);
+            return index != -1;
+        }
+    }
+}
\ No newline at end of file
diff --git a/TrueCraft.Core/Windows/Window.cs b/TrueCraft.Core/Windows/Window.cs
index 706d07f..7192fa1 100644
--- a/TrueCraft.Core/Windows/Window.cs
+++ b/TrueCraft.Core/Windows/Window.cs
@@ -4,15 +4,20 @@ using System.Linq;
 using System.Text;
 using TrueCraft.API.Windows;
 using TrueCraft.API;
+using TrueCraft.API.Networking;
 
 namespace TrueCraft.Core.Windows
 {
-    public abstract class Window : IWindow, IDisposable
+    public abstract class Window : IWindow, IDisposable, IEventSubject
     {
         public abstract IWindowArea[] WindowAreas { get; protected set; }
 
         public event EventHandler<WindowChangeEventArgs> WindowChange;
 
+        public bool IsDisposed { get; private set; }
+
+        public IRemoteClient Client { get; set; }
+
         public virtual void MoveToAlternateArea(int index)
         {
             int fromIndex = GetAreaIndex(index);
@@ -142,6 +147,8 @@ namespace TrueCraft.Core.Windows
                 WindowChange(this, e);
         }
 
+        public event EventHandler Disposed;
+
         public virtual void Dispose()
         {
             for (int i = 0; i < WindowAreas.Length; i++)
@@ -149,6 +156,10 @@ namespace TrueCraft.Core.Windows
                 WindowAreas[i].Dispose();
             }
             WindowChange = null;
+            if (Disposed != null)
+                Disposed(this, null);
+            Client = null;
+            IsDisposed = true;
         }
     }
 }
diff --git a/TrueCraft/RemoteClient.cs b/TrueCraft/RemoteClient.cs
index 1b7d0a9..dfc0198 100644
--- a/TrueCraft/RemoteClient.cs
+++ b/TrueCraft/RemoteClient.cs
@@ -208,6 +208,7 @@ namespace TrueCraft
         public void OpenWindow(IWindow window)
         {
             CurrentWindow = window;
+            window.Client = this;
             window.ID = NextWindowID++;
             if (NextWindowID < 0) NextWindowID = 1;
             QueuePacket(new OpenWindowPacket(window.ID, window.Type, window.Name, (sbyte)window.MinecraftWasWrittenByFuckingIdiotsLength));