DEDAKJ Oxygen Concentrator FAQ: Expert Answers to Your Top Questions

Your choice depends on three key factors:
• Flow requirements: mild demand (1-3L/min), moderate demand (3-5L/min), severe demand (5L+)
• Usage scenario: Home use requires stationary units , travel requires portable 
• Special features: Sleep apnea patients need models with nebulizer function
Consult our support for personalized recommendations.

• Asthma.
• Bronchitis.
• Chronic obstructive pulmonary disease (COPD).
• Cystic fibrosis.
• Emphysema.
• Heart failure.
• Lung cancer.
• Pneumonia.

Different products have different concentrations. You can choose according to your needs. You can check the product details.

The standard of 93%±3% is derived from clinical research: oxygen concentrations below 82% have limited effects on hypoxic patients, while long-term use of too high a purity (such as 100% pure oxygen) may lead to oxygen toxicity (damaging alveoli and affecting the respiratory center). This range can both meet the needs of hypoxia treatment and balance safety, and is therefore adopted by international medical standards (such as ISO).

We have many products that reach this concentration, such as:

1-9L Multi-Modal Oxygen Concentrator;

1-10L Continuous Flow Oxygen Concentrator

Oxygen flow is not the higher the better, it needs to match the condition: Long-term high-flow oxygen inhalation in patients with chronic obstructive pulmonary disease (COPD) may inhibit the respiratory center (the body relies on hypoxia to stimulate breathing), leading to carbon dioxide retention; Hypoxia needs to be dynamically adjusted according to blood oxygen saturation. Blindly increasing the flow rate is not only ineffective, but may also increase the burden on the body, so you must strictly follow the doctor’s advice.

Some of our oxygen concentrators have internal humidification functions, and some are equipped with humidification bottles to keep the oxygen moist at all times and protect the nasal cavity.

Critical precautions:
• NEVER use near flammables (paint, gas leaks)
• Maintain ≥2m distance from open flames
• Emphysema patients: flow rate ≤3L/min
• Premature infants require specialized blenders

Before you prepare an oxygen concentrator for long-term use, do the following:
• Remove the humidifier bottle, empty the bottle, wipe it dry, and put it back in place.
• Turn off the power and store the power cord.
• Do not store the oxygen concentrator in a humid, dusty environment, and avoid direct sunlight and contamination. Store the oxygen tube and oxygen concentrator in a dry place at room temperature, do not bend the airway tube, and place the oxygen concentrator out of the reach of infants and young children.

Before you use the oxygen concentrator again after a long period of use, do the following:
• Check that the power cord is intact.
• Clean the oxygen tube and oxygen concentrator to check if they are blocked or bent.
• Clean the humidifier bottle

1. The oxygen concentrator should not be placed in an environment with poor air circulation.
2. The oxygen concentrator should be placed in a well-ventilated place indoors, avoid direct sunlight, and be more than 10 cm away from walls, furniture, etc. Avoid stacking carpets, heaters, electric heaters, hot air ventilation equipment, etc.
3. The oxygen concentrator should not be placed near heat sources, open flames or dark fire sources.
4. The oxygen concentrator should not be placed in a humid, unshielded, smoky, heavily polluted, or too high or too low temperature environment.
5. No debris or containers containing water and oil should be placed on the top of the oxygen concentrator.
6. No debris should be placed at the bottom of the oxygen concentrator to prevent the air inlet and outlet from being blocked, causing excessive temperature, resulting in shutdown or decreased oxygen concentration.

Moisture-proof is a must! Molecular sieve is a hydrophilic material. A humid environment will cause it to absorb moisture instead of nitrogen, which will directly lead to a sharp drop in oxygen production capacity (or even scrapping). At the same time, humidity will accelerate the rust of internal parts of the compressor and shorten its life.

Our tiered warranty covers:
• Core components (sieve/compressor): 1 years
• Electronics: 1 years
• Casing/consumables: 6 months
*Original proof of purchase required. 

Global support process:
1. Submit Service Request Form online (include video)
2. Technical diagnosis within 48 hours
3. Free replacement parts shipped (duties covered)

(Except for human factors.)

Recommended under medical supervision if SpO₂ <94%:
• Use pulse dose mode only
• Limit sessions to 1 hour
• Low-flow only (≤2L/min)
Contraindicated in first trimester/hypertension

Recommend

Above 3000m/10,000ft:
• Use high-altitude models 
• Expect 15% flow reduction per 1000m
• Always monitor with pulse oximeter

Ideal settings:
• Standard: 40%-60% relative humidity
• Arid climates: Up to 70% to relieve dryness
• Warning: >80% may cause condensation
*Water temperature 20-30°C recommended

Critical setup steps:
1. Rest 24 hours (prevent sieve clumping)
2. Run dry for 1 hour before adding water
3. Monitor concentration stability for 72 hours

It is recommended to wipe the surface of the shell at least once a month. Please cut off the power before cleaning, wipe it with a clean, soft, slightly damp cloth soaked in disinfectant (medical alcohol), and prevent liquid from seeping into the machine.

Keep the humidification water bottle clean and add pure water to it. The water in the humidification water bottle should be changed every day. The humidification water bottle should be cleaned once a week. First shake it with detergent and then rinse it with clean water to ensure the hygiene of oxygen supply.

Filter element: Filter dust and bacteria in the air to protect the molecular sieve and the user. It is recommended to clean it weekly and replace it every 3-6 months. Otherwise, blockage will lead to insufficient air intake and a decrease in oxygen concentration.

Molecular sieve: The core oxygen production component. Its ability to adsorb nitrogen decreases with use time. Its life span is usually 1-3 years (depending on the frequency of use and ambient humidity). If the machine prompts “low oxygen concentration”, it may be that the molecular sieve has failed and needs to be replaced professionally.

It is recommended to replace it monthly.
Disinfection method: Soak in warm water below 70℃, do not wipe with alcohol

Recommended intervals:
• 500 hours: Clean intake filters
• 2000 hours: Replace fine filters
• 5000 hours: Professional sieve check