Equipment specifications are checkable. Vendor obligations are not, unless you make them written. Every line below is a question with a verifiable answer, and the “worrying answer” column is written from the answers we actually hear on service calls.
Commercial interest: We are one of the vendors this page is telling you to interrogate. Hyperbaric Service Pros installs and services chambers and sells equipment, so apply every question below to us as well — particularly the ones about scope of installation and parts lead times.
| Area | Ask exactly this | Good answer | Answer that should worry you | Why it matters |
|---|---|---|---|---|
| Warranty term and what it covers | Term in months for the pressure vessel, the fabric or shell, the zippers and seals, the compressor, the concentrator, and the electronics — separately. Consumables excluded? | A written schedule with a different term per component and a named consumables list. | One headline number with no component breakdown, or a term quoted verbally. | A five-year warranty on the shell and 90 days on the compressor is a 90-day warranty in practice, because the compressor is what runs every session. |
| Who performs warranty work | Manufacturer, dealer, or a third-party service network? Named company, and how far away? | A named service entity with a stated response window. | 'We'll take care of it.' | For a 2,000 lb hard shell, on-site service versus return-to-base is the difference between a day and a month of downtime. |
| Parts availability and lead time | Which parts are stocked in-country, and what is the quoted lead time for a seal set, a zipper, a relief valve, a window, a compressor head, and a control board? | Stocked-parts list with prices and lead times in writing. | Parts shipped from overseas on request with no stated lead time. Four of the chambers in the comparison table are manufactured outside the United States. | A chamber waiting on a seal is a chamber not in use. Ask before, not after. |
| Documentation supplied at delivery | Operating manual, maintenance schedule, ASME PVHO-1 documentation for a rigid vessel, 510(k) K-number, test certificates, and the permitted-materials list. | A document pack listed on the quote as a deliverable. | Manual as a PDF link, nothing else. | FDA's August 2025 letter directs users and facilities to follow the manufacturer's instructions for safe use; you cannot follow instructions you were not given. |
| Regulatory position, stated in writing | What is this device's cleared indication, what is the K-number, and who is the applicant on that clearance? | A K-number you can verify in FDA's database against the same applicant name. | 'FDA approved.' Hyperbaric chambers are Class II devices cleared under 510(k); they are not PMA-approved. One data sheet in the comparison table cites a K-number that FDA's records assign to a different company. | The seller's statements are the seller's own labelling. A wrong regulatory claim is a problem you inherit. |
| Prescription handling | How does this sale satisfy 21 CFR 801.109, which conditions the prescription-device exemption on the device being sold only to or on the order of a licensed practitioner? | A documented process involving an actual practitioner order. | A checkbox at checkout. FDA has stated plainly that hyperbaric oxygen chambers are prescription devices. | In FDA's UDI database, 138 of 144 listings under product code CBF are flagged prescription and none are flagged over-the-counter. |
| Installation scope | What exactly is included: freight class and liftgate, inside delivery, stair or doorway handling, assembly, electrical connection, commissioning, leak and relief-valve check, operator training. Line by line. | An itemised scope with what is excluded stated explicitly. | 'Installation included' as a single line. | Curbside delivery of a 2,000 lb crate is not installation. This is the single most common gap between a quote and the real cost. |
| Service coverage after warranty | Annual service cost, what it includes, travel charges, and hourly rate for out-of-scope work. | A published or quoted annual figure. | No answer, or 'as needed'. | Post-warranty service is the largest uncertain line in a five-year cost picture. The calculator on this site leaves it as a field you fill in from a real quote. |
| Training and handover | Who is trained, on what, for how long, and is there a written competency record? | Named training deliverable with a document at the end. | A video link. | FDA's 2025 recommendations include ensuring proper training is provided and maintained for staff. |
| References you can actually call | Two owners of this exact model, purchased more than two years ago, who will take a call. | Contact details, with permission, for real installations. | Testimonials on the vendor's own website. Treat any review you cannot trace to a named buyer as marketing. | Nothing on this page substitutes for talking to someone who has owned the model through a failure. |
| Resale and transfer | Will the manufacturer support a second owner, transfer the warranty, and sell parts and manuals to them? | A written transfer policy. | Silence, which in practice means no. | It sets the resale value, which is part of the real cost of ownership. |
Regulatory statements above are sourced: FDA Product Classification — chamber, hyperbaric (CBF) · FDA Letter to Health Care Providers, 25 Aug 2025 · 21 CFR 801.109 (GPO official text) · openFDA UDI prescription-flag counts for product code CBF.
The two documents to ask for at quote stage
An itemised installation scope
Freight class, liftgate, inside delivery, doorway and stair handling, assembly, electrical connection, commissioning, leak and relief-valve check, operator training — each either included or excluded in writing. No manufacturer in our comparison table publishes an installation price, which means every figure you are given is negotiable and every omission is yours to pay for.
A component-by-component warranty schedule
Vessel or shell, zippers and seals, compressor, concentrator, electronics, and consumables, each with its own term. This one document tells you more about a vendor's confidence in their own equipment than any brochure.
If your question is really about what an installation involves physically — electrical capacity, floor loading, ventilation, freight access — that is covered properly on Hyperbaric Buyers Guide rather than here.
Put the quote into the cost calculator Inspection checklist for used equipment