> For the complete documentation index, see [llms.txt](https://docs.bierbot.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bierbot.com/using-bricks/equipment-types/biab.md).

# BIAB / MLT / HLT

The "BIAB / MLT / HLT" is the right type for mashing if you have a BIAB setup or want to start the easy way with automating parts of your HERMS setup. Upsides of a "BIAB / MLT / HLT" device over a regular "Mashtun" device include:

1. Being able to initialize your pumps

![Interfaces of a BIAB device.](/files/TSvTt8N2my2BozQK1FAt)

This device type also supports automatic **calibration**. Read [Calibration](/using-bricks/equipment/calibration.md) to find out, what the huge benefits of calibrating your device are.

### Interfaces

Much like the "Mashtun", it offers three different interfaces:

* Electrical switches for heating (required)
* Electrical switches for circulation pumps, i.e., to init pumps.
* Temperature sensors for wort temperature (required)

### Settings of "BIAB / MLT / HLT"

You can change the following settings

* "When to turn the circulation on" (pump from MLT through Coil of HLT):
  * "Always on": The stirring will be always on. Only requirement: The recipe step (in Automatic) or toggle (manual) must have circulation to be set to "turned on".
  * "Only during and after heating": This will only turn the circulation on when the heating is turned on and a configurable amount of time (in minutes) after heating was turned off.
  * "Only when heating": Like the last option, only that circulation will be turned off immediately after heating is stopped without any delay.
* Pump init cycles: Set a number of pump inits to get the air out of your tubes. This will turn on and off your pump a couple of times
* Duration of ON in a init cycle (requires "Pump init cycles" to be larger than 0): Set the on duration of the init cycle.
* Duration of OFF in a init cycle (requires "Pump init cycles" to be larger than 0): Set the off duration of the init cycle.

![Settings of a "BIAB / MLT / HLT" device.](/files/NnJKSdPtodA3sbG82BFf)