Frequently Asked Questions

Our online shopping cart and security technology ensures the safest and most reliable checkout experience for our customers.

Our business is located in NC. If your order is from NC you will be charged a sales tax.

Yes. Basically you plug it in, turn it on. It is ready in about one minute

Unit specifications are revealed when clicking on the individual machine icons.

Yes. There is a flow knob that goes from one-half liter per minute to 5 liters or 10 liters per minute or more, depending on the production capacity of the unit.

All of our units produce 93% – 95% oxygen.

It takes air from the room, filters out the nitrogen and gives you the pure oxygen. The nitrogen is absorbed by the zeolite in canisters inside the machine.

It is built to last over 10,000 hours.

No, not to buy a machine. We do not provide medical advice. Please seek additional information regarding non-medical uses by visiting our sponsors at

For Recreation and Hobby use, you will receive a 50-foot hose, 1 nasal cannula, a humidifier bottle and a manual.

Please see our accessory link. All accessories are obtained through one of our sponsors. We are authorized to offer a $25.00 coupon code MOMOHA25 towards the $35.00 membership fee should you choose to join the Oxygen and Health Association.

We do not provide medical advice. Please seek additional information regarding non-medical uses by visiting our sponsors at

Charlotte, NC..

The closest distribution center to the customer via FedEx ground or UPS ground. There are several distribution points across the USA and offshore.

Within 10 – 14 days depending on national holidays and inclement weather.

We stand behind our products. We have the best prices in the country. Many oxygen generators are sold by private parties or small companies that may not withstand the test of time. We have been in business for over 20 years and refurbished thousands!

If not satisfied for any reason, the REBUILT oxygen units can be returned within 30 days of delivery for refund of purchase price, less $125.00 (Continental USA) and $299.00 (Alaska, Hawaii and Canada) for shipping. For NEW units, if you think you might return it be advised that it then becomes a USED unit and the value greatly drops.
The workaround for this is we send you a rebuilt unit and if you are satisfied then we can switch out the rebuilt for a new or you can keep the rebuilt. 

If you have used a new machine and are returning it, it is now a rebuilt unit and the refund will be adjusted accordingly. See the rebuilt pricing for clarity. 

Concentrator must be received in good operating condition. You MUST call us for a Return Authorization Number (RAP) and return shipping address.

Please feel free to contact us if you have questions about our products, or if you are looking for something specific. Call us today at 704.5976775 Monday to Friday 10am – 6pm EST or email us at We are located at: 1820 Sunhaven Ct. Charlotte, NC 28262