Encased Fan

The **Encased Fan** is a mechanical component that can create air streams. Encased Fans are used for moving entities, vertical transport of items, Bulk Washing, Bulk Blasting, Bulk Haunting, and Bulk Smoking.

The Encased Fan connects to other rotational components from the back.

## Usage

### Pushing and Pulling Entities

When powered by Rotational Force, an Encased Fan creates an air stream that extends several blocks in front of it. This air stream pushes entities away from the fan or pulls entities towards it depending on the direction of the rotation that the fan receives. Powering an Encased Fan with faster rotational force will cause its air stream to be stronger and faster.

Items will always be pushed, but mobs or players won't be pushed until the Fan is running at least 4 rpm. The maximum push and pull distance can be changed in the Config. Below is a table detailing how far a fan can push items horizontally.

### Vertical Item Transport

Main article: Chute
Fans can also be used to push or pull items through Chutes. Items inserted into the chutes will be pushed/pulled by the fan.

### Bulk Item Processing

When the air stream of an Encased Fan passes through certain blocks, the air stream downstream will apply the respective processing to items.

* Washing:
	+ Water
* Smoking:
	+ Fire
	+ Campfire
	+ Empty Blaze Burner lit with Flint and Steel
	+ Blaze Burner (smouldering)
* Blasting:
	+ Lava
	+ Blaze Burner (Fueled)
* Haunting:
	+ Soul Fire
	+ Soul Campfire
	+ Empty Blaze Burner lit with Flint and Steel and right clicked with Soul Sand or Soul Soil.

The respective recipes are applied to item entities when they sit in the air stream, whether they are in the world, on a Mechanical Belt, or on a Depot. These recipes can be applied to multiple items at once.

The Fan's airstream can pass through certain blocks, such as non-solid ones and those tagged with FAN\_TRANSPARENT. 4 ray tests are also performed to check for holes in the block's collision shape. These blocks may be useful for building bulk item processing setups, as they can hold back lava or water while allowing the air stream through. The following is a list of blocks with the FAN\_TRANSPARENT Tag:

* Fences
* Iron Bars
* Metal Bars
* Campfires
* Leaves
* Sail Frames
* Copycat Blocks

The following blocks do not have the FAN\_TRANSPARENT tag, but are transparent:

* Sign

#### Mob Interaction

When the player or a mob steps into a Bulk Processing stream, various effects may be applied.

* Smoking sets the entity on fire and deals 2 or 3 damage depending on Difficulty.
* Blasting sets the entity on fire and deals 3, 4, or 6 damage depending on Difficulty.
* Washing streams extinguish entities on fire and deal 2 damage to Endermen, Blazes, and Snow Golems.
* Haunting streams apply Slowness II and Blindness.

(SPOILER WARNING)

#### Bulk Item Processing Speed

All forms of Bulk Processing (Smoking, Blasting, Haunting, and Washing) process items at the same speeds. Multiple fans applying the same processing effect on the same block divide the processing time. For example, two fans creating an air stream through water will process the same amount of items twice as fast as one fan. However, different stack sizes take a different amount of time to process, as listed below:

**Bulk Item Processing Speeds**
(divide by amount of fans)
 17-32
 33-48
 49-64

Note that if a recipe's output is also a valid input for a different recipe (such as Cobblestone → Stone → Smooth Stone), the second recipe will start being processed immediately after the previous one is finished. Use Depots with filtered Brass Funnels, Mechanical Arms with filtered outputs, or Mechanical Belts set to the correct speed (as listed above).

Use this reference table as a starting point to work out how many fans you need to process various throughput rates of items. Note that at speeds of above 56 RPM, mechanical belts do not carry additional items, but you will require additional fans, so you should never run belts faster than 56 RPM through bulk material processing setups.

#### Bulk Item Processing Recipes

* Bulk Smoking will apply any recipe that can be applied in Smokers.
* Bulk Blasting will apply any recipe that can be applied in Furnaces but not Smokers.
	+ **Warning:** Passing incompatible items through Bulk Blasting will incinerate them.
* Bulk Washing will apply any recipe listed below:

* Bulk Haunting will apply any recipe listed below:

### Power Generation

Before version 0.5, an Encased Fan could generate Rotational Force at a speed of 16 RPM when placed above a Magma Block, Lava, Fire, or Campfire and powered via Redstone. After version 0.5, this feature was removed.

## History

* 0.5: Can no longer be used as a power generator.
* 0.4c: Added Bulk Haunting Recipes.
* 0.2.4: Washing Fans damage Endermen.
* 0.2.3: Can now be moved in Contraptions.
* 0.2: No longer affect their environment in both directions.
* 0.1: Introduced.