# Environmental Control

The environmental control provides ventilation and/or heating to the cabin, indicating/recording system, and defogging for the windshield. It consists of the systems that follow:

* [Distribution](#distribution)
* [Avionics fans](#avionics-fans)
* [Heating](#heating)

## Distribution

The distribution provides ram air ventilation to the cabin. For a system discussion and/or description, refer to [Distribution](https://bell-505-guide.gitbook.io/bell-505-maintenance-guide/system-descriptions/airframe-systems/environmental-control/distribution).

## Avionics fans

The avionics fans system provides area cooling to the Garmin Display Units (GDU 1040H). It is controlled by the indicating/recording system. For a system discussion and/or description, refer to [Avionics Fans](https://bell-505-guide.gitbook.io/bell-505-maintenance-guide/system-descriptions/airframe-systems/environmental-control/avionics-fans).

## Heating

The heating provides heated air to the cabin, and defogging for the windshield. For a system discussion and/or description, refer to [Heating](https://bell-505-guide.gitbook.io/bell-505-maintenance-guide/system-descriptions/airframe-systems/environmental-control/heating).