The Common Knowledge about HBOT Chamber Pressure and Oxygen Flow

"Common sense" analysis of the oxygen flow rate of a high-pressure oxygen generator as the pressure increases

In the field of hyperbaric oxygen chamber treatment, a high-pressure oxygen generator is an indispensable device that provides patients with high-concentration oxygen and helps them recover. However, there is a phenomenon that is often mentioned, but is widely accepted as industry common sense: the oxygen flow rate of a high-pressure oxygen generator will decrease as the pressure increases. Today, let's talk about the scientific logic behind this "common sense" and its significance to hyperbaric oxygen therapy.

The "flow code" of hyperbaric oxygen therapy

The hyperbaric oxygen chamber increases the pressure in the chamber, allowing patients to inhale high-concentration oxygen to promote body repair and recovery. The stability of the oxygen flow rate directly determines the treatment effect. The DR HUGO uMR O10 30L oxygen generator is designed for high-pressure environments, with a nominal flow rate of up to 30 liters/minute (at normal pressure, 1 ATA), and an oxygen purity of 96%±3%, which is an industry benchmark. But did you know? In a hyperbaric oxygen chamber, the oxygen flow rate will change due to the increase in the pressure in the chamber-this is common sense in gas physics and a scientific consideration in equipment design.

In a single-person horizontal hard cabin, uMR O10 demonstrated convincing adaptability. The following is its actual oxygen flow performance at different pressures:

·1.5 ATA (about 151.9 kPa): The actual oxygen flow is stable at 18 liters/minute.

This flow is sufficient to support efficient oxygen replacement in a single cabin. Whether it is oxygen supply through a mask or diffusion in the cabin, it can ensure that the patient inhales high-concentration oxygen, promote blood oxygenation, and accelerate tissue repair. The output of 18 LPM perfectly balances the treatment needs and equipment performance, making every treatment worry-free.

·2.0 ATA (about 202.6 kPa): The actual oxygen flow is 10 liters/minute.

Why does the flow rate change? Science reveals the secret for you

You may be curious: Why does the oxygen flow rate decrease as the pressure increases? This is actually the "common sense" of the operation of hyperbaric oxygen equipment. In a hyperbaric oxygen chamber, the pressure inside the chamber is far higher than the normal pressure. The oxygen output by the oxygen concentrator needs to fight against the higher back pressure, and the flow rate will naturally be limited to a certain extent. This is just like the water flow rate will slow down in a pipe with higher water pressure, which conforms to the Bernoulli principle and gas flow characteristics.

Imagine that you are blowing up a balloon: when the balloon is just starting to inflate, it is easy to blow air in; but as the balloon becomes more and more bulging and the internal pressure increases, you need to blow harder to blow in the same amount of air. The working principle of a hyperbaric oxygen concentrator is similar. In a hyperbaric oxygen chamber, the ambient pressure usually reaches 1.5-2.0 ATA (absolute atmospheric pressure), which is far higher than the normal pressure (1 ATA). The oxygen output by the oxygen concentrator needs to fight against the "high pressure resistance" in the chamber, which naturally affects the outflow rate of oxygen.

Specifically, the nominal flow rate of the oxygen concentrator (such as 10 liters/minute) is measured at normal pressure. When the cabin pressure increases, the oxygen molecules are compressed, the back pressure of the pipeline and the outlet increases, and the compression pump of the oxygen concentrator needs more power to maintain the same output. However, the design of most oxygen concentrators is not fully optimized for ultra-high pressure environments, so the flow rate will inevitably decrease. It's like driving uphill, the engine needs more power, but the speed may still be slower - completely in line with the laws of physics!

An ideal partner for single-person horizontal hard cabins

DR HUGO uMR O10 30L oxygen concentrator is not only remarkable in flow performance, but also demonstrates all-round advantages in practical applications:

· Efficient oxygen supply, worry-free treatment: 18 LPM (1.5 ATA) and 10 LPM (2.0 ATA) flow rates can easily meet the oxygen needs of single cabins, and can provide stable high-concentration oxygen for both daily health care and professional rehabilitation.

· Intelligent design, easy operation: Equipped with touch screen control and timing function, uMR O10 allows users to easily grasp the status of the device, and overheating protection and fault alarm further enhance safety.

· Small cabin with great use, flexible adaptation: The single-person horizontal hard cabin is compact in size, and the efficient oxygen supply of uMR O10 ensures that the oxygen concentration in the cabin quickly reaches the treatment requirements (such as 26%-60%), and long-term stable operation can be achieved without an additional oxygen source.

·Healthy protection, long-lasting durability: With high-quality molecular sieves and compressors, the uMR O10 still performs well in high-pressure environments, with both durability and stability, providing long-term protection for families and small clinics.

This is not only common sense, but also science

There is a solid scientific basis behind this phenomenon. According to the Bernoulli principle and gas flow characteristics, when the outlet pressure increases, the volume of gas passing through the pipeline per unit time will decrease. Unless the equipment is equipped with a special high-pressure compensation system, it is normal for the flow rate to decrease.

Choose DR HUGO and embrace a healthy future

Hyperbaric oxygen therapy is a race against time, and the DR HUGO uMR O10 30L oxygen concentrator is your best partner on the road to health. With its stable performance of 18 LPM (1.5 ATA) and 10 LPM (2.0 ATA), it proves that the common sense of "flow changes with pressure" not only does not damage the treatment effect, but is the embodiment of scientific design. Whether you want to improve sleep, speed up postoperative recovery, or provide more professional health support for your family, uMR O10 can work seamlessly with the single horizontal hard cabin to bring a safe and efficient experience.

2026.06 About Upgrade Oxygen Flow Notice

Based on recent feedback, customers are increasingly concerned about oxygen flow rate. Therefore, we would like to provide an update.

Back in 2025, we upgraded the oxygen flow rate of all oxygen sources. Some customers require higher oxygen flow rates under high pressure conditions, so our technical department began research and development long ago. Without changing the oxygen source specifications, the oxygen flow rate at different pressures has been increased. Below are some examples of the upgrades for different oxygen source specifications:

For 15L oxygen concentrator uMR O8+:

At 1.5ATA chamber pressure: Original output reaches 8–9 LPM

Upgraded 1.5ATA performance: Stable 10–11 LPM oxygen flow

At 2ATA chamber pressure: Output drops to merely 3–4 LPM

Upgraded 2ATA performance: Steady about 7 LPM oxygen flow

For 30L oxygen concentrator uMR O10:

At 1.5ATA chamber pressure: Original output reaches 14.5 LPM

Upgraded 1.5ATA performance: Stable 20L LPM oxygen flow

At 2ATA chamber pressure: Output drops to merely 4.5LPM

Upgraded 2ATA performance: Steady 10-12 LPM oxygen flow

It is worth a key professional reminder here: there is no need to blindly pursue excessively high oxygen flow. The average human body can only inhale and utilize around 6–7 liters of oxygen per minute during HBOT sessions. This makes our upgraded 7 LPM stable output at 2ATA perfectly match the body’s actual oxygen absorption demand, eliminating waste of oxygen resources while delivering optimal therapeutic intake. For 1.5ATA operation with 10–11 LPM flow, it easily satisfies oxygen demand for single or dual users inside the cabin with ample surplus buffer.

Higher sustained oxygen flow inside the hyperbaric cabin means more efficient HBOT sessions, better tissue oxygenation, faster post-sports recovery, superior anti-fatigue effects and consistent therapy efficacy for home, clinic and wellness center dual-person chambers.

BTW, if you want to upgrade the oxygen flow, it would has extra cost. Please contact our sales before you place the order.

This video is to show you the oxygen flow change we made for 15L concentrator uMR O8+: