Inhalation can be performed via a steam bath or via technical devices such as nebulizer systems. A distinction is made between:
- Nozzle nebulizer: a compressor generates compressed air, which entrains liquid particles with it.
- Ultrasonic nebulizer: an ultrasonic crystal generates vibrations in the liquid, which causes droplets to be ejected.
- Membrane nebulizer: the liquid is forced through a membrane with a defined pore size, creating droplets.
There are also combination devices, which can additionally extract secretions.