AHUs are most useful in places that must house many people with limited natural ventilation sources, such as convention halls and hotel dining rooms. Units are also helpful for maintaining "clean rooms," like laboratories and operating rooms.
In addition to managing the proper ventilation of indoor air, AHUs:
- Filter and purify the interior air to maintain good indoor air quality
- Control indoor temperatures
- Monitor indoor humidity levels
AHUs are sometimes located in the basement of a building or on the roof.