# 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)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.bierbot.com/using-bricks/equipment-types/biab.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.