A classic HBO chamber consists of a closed pressure chamber designed for multiple people. Under increased pressure, typically between 2.0 and 3.0 ATA, pure compressed oxygen is inhaled via a breathing regulator. The high effectiveness of this method has been extensively documented in numerous studies. On our Knowledge page, we have summarized the most important studies.

The mild hyperbaric oxygen chamber differs in its pressure level (below 2.0 ATA) and especially in its technical design. X4 mild hyperbaric oxygen chambers are strongly ventilated, meaning that large volumes of compressed ambient air are continuously circulated through the chamber. This prevents any build-up of CO₂ or oxygen inside the chamber. The user inhales highly concentrated oxygen, generated on demand by specially optimized oxygen concentrators. This process eliminates all typical technical risk factors of the classic HBO chamber.

In both approaches, oxygen is dissolved directly into the blood plasma according to Henry’s Law. Starting at a pressure of 1.6 ATA, there is a risk of oxygen toxicity. For this reason, interval breathing is used—so-called air breaks. At higher pressures, these breaks need to be extended accordingly. However, longer air breaks significantly reduce the amount of oxygen that can be absorbed.
There is also evidence suggesting that, particularly at higher pressures above 2.0 ATA, the user’s immune system is subjected to considerably greater stress.

The supply unit developed by X4 (patent pending), the X4O-PRO+, makes it possible to achieve maximum oxygen intake despite operating at lower pressures.