| Operating Pressure | Define the maximum working pressure required for the intended users and operating environment. | Commonly marketed mild chambers operate around 1.3–1.5 ATA. The exact range varies by design and jurisdiction. | What are the minimum, nominal, and maximum operating pressures? Is the pressure rating independently tested? |
| Chamber Capacity | Choose single-person or multi-person capacity according to the treatment model, available space, and staff requirements. | Single-person chambers are generally intended for one occupant. Larger systems may accommodate more than one person but require additional space, ventilation, and operational controls. | What is the usable internal length, width, and height? Can the user enter and exit without assistance? |
| Installation Space | Measure the room, doorway, floor loading, ventilation, electrical supply, and service access before ordering. | Allow additional clearance around the chamber for operation, cleaning, emergency access, and maintenance. The required clearance is model-specific. | What are the packed dimensions, installed footprint, total weight, doorway clearance, and recommended service clearance? |
| Oxygen Delivery | Determine whether oxygen is delivered through the chamber atmosphere, a mask, a hood, or another dedicated breathing system. | A chamber pressurized with air is different from a system that provides supplemental oxygen. Oxygen concentration and delivery method must be specified separately. | What oxygen concentration reaches the user? Is oxygen concentration continuously monitored and alarmed? |
| Pressure Monitoring | Require a clear pressure gauge or digital display that can be read by both the operator and the occupant when appropriate. | The displayed pressure should be provided in a clearly identified unit, such as ATA, bar, or psi, with a defined measurement accuracy. | What is the gauge accuracy? How often is calibration required, and is a calibration record supplied? |
| Emergency Deflation | Select a system with a controlled decompression method and a clearly accessible emergency release procedure. | Emergency decompression controls should be designed to prevent uncontrolled pressure loss and should be usable by trained personnel. | How long does emergency decompression take? Can the chamber be opened from inside and outside? |
| Fire and Oxygen Safety | Assess ignition control, electrical components, static-risk management, prohibited materials, and oxygen-handling procedures. | Higher oxygen concentrations increase fire risk. The operating manual should define oxygen limits, approved accessories, cleaning materials, and fire-response procedures. | What fire-safety testing has been completed? Which fabrics, electronics, lubricants, and accessories are permitted inside? |
| Materials and Construction | Choose materials that tolerate repeated pressurization, cleaning, humidity, and normal user movement. | Transparent viewing panels, reinforced fabric or rigid shells, sealed ports, and replaceable seals are common design considerations. | What pressure-cycle testing, leak testing, seam testing, and material-cleaning validation are available? |
| Comfort and Accessibility | Consider user height, body size, mobility, claustrophobia, communication needs, and the ability to remain inside for the full session. | Useful features may include internal lighting, communication equipment, viewing windows, mattress support, and accessible entry arrangements. | Can the user communicate with the operator continuously? Is there sufficient space for the intended user and approved medical equipment? |
| Noise and Ventilation | Specify acceptable noise, heat, humidity, and air-exchange conditions for the planned session duration. | Noise and ventilation performance depend on the compressor, filtration, chamber volume, and air-exchange design; suppliers should provide measured specifications. | What is the operating noise level? What filtration and air-exchange rates are provided? |
| Electrical Requirements | Confirm voltage, frequency, current, plug type, grounding, backup power needs, and local electrical-code compatibility. | Electrical specifications are model- and country-specific. The installation should use the voltage and frequency stated on the equipment rating label. | What are the rated voltage, frequency, power consumption, fuse requirements, and grounding requirements? |
| Regulatory Status | Verify the legal classification and permitted use in the country or region where the chamber will be installed. | Regulatory classification, registration, labeling, and permitted claims vary by jurisdiction and by whether the device is used for wellness or medical purposes. | Which conformity documents, registrations, risk assessments, and applicable standards support this exact model? |
| Maintenance and Consumables | Estimate recurring costs for filters, seals, valves, oxygen sensors, cleaning supplies, calibration, and preventive maintenance. | Replacement intervals depend on usage, environmental conditions, manufacturer specifications, and inspection results. | Which parts are user-replaceable? What is the recommended preventive-maintenance schedule and service response time? |
| Documentation and Training | Require complete operating, cleaning, emergency, inspection, and maintenance instructions before acceptance. | A responsible supplier should provide model-specific manuals, training materials, inspection checklists, warranty terms, and documented emergency procedures. | Is operator training included? Are manuals available in the required language, and are service records retained? |