Most distributors approach this as a product question and end up with an inventory problem. A portable oxygen concentrator and a stationary unit are not two versions of the same purchase — they serve different patients, are paid for by different budgets, and fail in different ways in the field. Get the split wrong and you carry batteries you cannot service or cabinets your payers will not rent.
This article is written for the buyer at a DME/HME business, importer or home-care provider who has to commit to a mix before the season starts. It sets out the operational differences that decide a stocking decision, the numbers you should demand from any portable oxygen concentrator supplier before signing, and a simple ratio model you can run against your own referral data.
The real question: patient profile, not product category
Start with who your referral base actually serves. Three profiles cover most of the volume, and each one pulls inventory in a different direction.
Housebound patients on continuous flow. These patients spend most of the day and all night at home, often at higher prescribed flow. They need a stationary unit that delivers continuous flow for hours at a time, and they need it installed and maintained. This is the classic rental business: the equipment stays with the patient, the payer pays monthly, and your margin depends on how rarely the unit comes back.
Ambulatory patients who leave the house. Work, school, clinics, travel. These patients need something they can carry, and they need it to work away from a wall socket. Portable oxygen concentrators serve this profile, but they generate a service relationship the stationary side does not: batteries age, filters clog, and users call when a unit stops mid-errand.
Discharged and post-acute patients. Short-term, often reimbursed at a higher rate, often the entry point for a new account. They consume whichever device the discharge planner can arrange fastest, which is why having both categories in stock shortens your sales cycle.
The category follows the patient. If your market pays for home oxygen as a monthly rental, the stationary unit is the volume line and the portable is an add-on sold to the ambulatory minority. If your market is largely private-pay and retail, the portable is the product patients ask for by name, and the stationary unit becomes the special-order item. Before you place a portable oxygen concentrator wholesale order, confirm which of those two economies you are actually operating in. A distributor buying home oxygen concentrator wholesale quantities alongside a portable line has two different service models sitting in the same warehouse, and they should be budgeted separately.
Flow rate and purity under continuous use
Flow is the number printed largest on every brochure and the least useful on its own. A portable rated at five litres per minute in pulse dose and a stationary unit delivering five litres per minute continuously are not comparable products, even though both sheets say “5 LPM”.
Ask each supplier for the flow-and-purity table: delivered oxygen concentration at every setting, measured to the relevant standard, with the test conditions stated. Then ask the question that separates serious manufacturers from catalogue sellers — does the device deliver continuous flow, or only pulse dose?
The distinction matters because pulse dose vs continuous flow is not a preference, it is a clinical constraint. Pulse-dose portables sense inhalation and deliver a bolus of oxygen; they are efficient, they extend battery life, and they are appropriate for many ambulatory patients. They are not a substitute for continuous flow for a patient who needs a steady supply overnight, when breathing is shallow and a triggering breath may not be detected reliably. If a distributor sells a pulse-only device into a continuous-flow indication, the return comes back as a clinical complaint, not a technical one.
For stationary inventory, insist on the delivered concentration at maximum rated flow, not only at a mid setting — output that holds at 3 LPM and sags at 5 LPM is a common weakness. Review the 5L home concentrators specification page against the datasheet your supplier sends, and treat any gap between the two as a question to resolve before the first container. If you are still deciding between 5L and 10L configurations, the oxygen concentrator buying guide sets out the five specification numbers that change the commercial outcome.
Battery runtime and recharge realities
“Portable oxygen concentrator battery life” is the most abused phrase in this category. A runtime figure means nothing without four conditions attached: the flow setting, the delivery mode (pulse or continuous), the load and temperature under which the test ran, and whether the battery was new. A unit quoted at eight hours at setting one may deliver well under half that at a higher setting, and less again in a cold vehicle.
The practical consequence for a distributor is that you cannot compare two portables on the headline number. Ask for a runtime table by setting, and ask what happens to delivered dose as the battery discharges. Then plan the accessories, not just the device:
- Spare batteries. A POC with one battery is a device with a hard stop in the middle of the day. Most ambulatory patients need a second battery, and most distributors should stock spares as a line item rather than an afterthought.
- Charging paths. Confirm AC charging, DC car charging and any external charger option, plus charge time from empty. A patient who drives will judge the product on the car lead, not the specification sheet.
- Battery as a consumable. Lithium packs lose capacity over cycles. Ask for the expected cycle life and the replacement policy, then price the battery into the three-year cost of the account instead of discovering it at year two.
- Serviceability. Can the pack be replaced in the field by a technician, or does the unit have to be returned? The answer determines whether you can support the product from a regional depot.
If your team cannot answer those four points for a model, you are not ready to stock it — regardless of the unit price.
Airline travel: UN38.3, MSDS and carrier approval
Air travel is where portable sales are won and where documentation failures are most visible, because the buyer is the passenger and the carrier is the gatekeeper.
Two separate approvals are involved, and distributors routinely conflate them. The first is transport documentation for the lithium battery: a UN38.3 test summary, a safety data sheet, and packaging that has passed the drop test normally requested for air cargo. The second is acceptance for in-flight use, which is granted per model and per carrier. A carrier will typically require the manufacturer’s documentation confirming the device is accepted for carriage, and enough battery capacity to cover the flight duration plus a reserve — which is exactly why the runtime table in the previous section matters commercially, not just technically.
The documentation pack should also be complete enough for the importer’s own file: declaration of conformity where applicable, test reports, labelling and the manual in the destination language. Our import documentation checklist sets out the market-by-market list, including the battery and shipping documentation that customs and carriers ask for first.
A simple test before you list a portable as “flight approved”: can you produce, within one working day, the acceptance document that names the exact model? If not, the claim should not appear on your site.
Post time: Nov-11-2026