{"product_id":"inogen-one-g4-portable-oxygen-concentrator-used","title":"Used Inogen One G4 Portable Oxygen Concentrator – Ultra‑Light Pulse Dose","description":"\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eStay mobile with one of Inogen’s lightest portable concentrators at a lower cost with this\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eused Inogen One G4 portable oxygen concentrator\u003c\/strong\u003e. Weighing about\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2.8 lb with a single battery\u003c\/strong\u003e, the G4 is built for shoppers who want a very small, easy‑to‑carry device for daily errands, appointments, and travel.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.inogen.com\/wp-content\/uploads\/2024\/09\/Inogen-One-G4-Spec-Sheet.pdf\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eThe Inogen One G4 is a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epulse‑dose portable oxygen concentrator with three settings (1–3)\u003c\/strong\u003e, delivering oxygen in pulses when it detects inhalation. It is meant for users whose prescriptions allow pulse‑dose therapy rather than continuous flow, so your clinician should confirm that a portable pulse‑dose device is appropriate—especially for sleep or higher oxygen needs.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/hartmedical.org\/product\/inogen-one-g4-system-8-cell\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eThis unit is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003epre‑owned and professionally reconditioned\u003c\/strong\u003e. It has been tested, inspected, cleaned, and sanitized for safe, reliable use; as a used concentrator, it may show normal cosmetic wear, but the focus is dependable performance and battery function.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/puremedco.com\/inogen-one-g4\/\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"why-choose-a-used-inogen-one-g4\"\u003eWhy choose a used Inogen One G4\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eUltra‑lightweight option\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein the Inogen family at about 2.8 lb with the single battery.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/oxygen-concentrators.co.uk\/products\/new-inogen-one-g4-portable-oxygen-concentrator-8-cell\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eIdeal for people who prioritize\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esmall size and short outings\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003emore than maximum flow range.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eLets you own an\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eInogen‑brand POC at a lower price\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethan a new system while keeping recognized quality.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/oxygensupport.com\/en-ca\/products\/inogen-one-g4-portable-oxygen-concentrator-light-weight\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"key-specs-at-a-glance\"\u003eKey specs at a glance\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc pl-8\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eDelivery mode:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePulse‑dose oxygen,\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003esettings 1–3\u003c\/strong\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.inogen.com\/resources\/what-to-know-about-oxygen-concentrator-liter-flow\/\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eWeight (single battery):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eabout\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2.8 lb\u003c\/strong\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.medi-shop.gr\/en\/portable-oxygen-concentrators\/inogenone-g4-portable-oxygen-concentrator-16-cells\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eSize (single battery):\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eapprox.\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5.91 in L × 2.68 in W × 7.2 in H\u003c\/strong\u003e\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.inogen.com\/wp-content\/uploads\/2024\/09\/Inogen-One-G4-Spec-Sheet.pdf\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eNoise level:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eabout\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e40 dBA at setting 2\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor quiet operation.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.inogen.com\/product\/g4-system\/\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003eBattery life when new:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eup to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e2.7 hours with the single battery\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand about\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e5 hours with the double battery\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eon setting 1.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.respshop.com\/products\/inogen-one-g4-single-battery?r_sort=helpful\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003e\u003cstrong\u003ePower:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eAC (100–240V, 50–60 Hz) and DC vehicle power for home and travel use.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/oxygen-concentrators.co.uk\/products\/new-inogen-one-g4-portable-oxygen-concentrator-8-cell\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"battery-and-travel-expectations\"\u003eBattery and travel expectations\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eBattery runtime on this\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eused\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eG4 will depend on your setting, breathing rate, altitude, and especially\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ebattery age\u003c\/strong\u003e. Many users add a spare or newer battery—or use DC power in the car—if they need more predictable runtime for longer days.\u003cspan class=\"citation-nbsp\"\u003e\u003c\/span\u003e\u003cspan class=\"citation inline\" data-pplx-citation=\"\" data-pplx-citation-url=\"https:\/\/www.respshop.com\/products\/inogen-one-g4-portable-oxygen-concentrator-pulse-dose\"\u003e\u003cspan class=\"group\/trigger inline-flex min-w-0\" data-state=\"closed\"\u003e\u003cspan class=\"citation inline\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:align-top\"\u003eThe Inogen One G4 is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eFAA‑approved for in‑flight use\u003c\/strong\u003e, making it a popular choice for flights and trips as long as airline battery and paperwork rules are followed. Always confirm your airline’s current requirements and bring enough charged batteries (often 150% of flight time plus ground time) before traveling.\u003c\/p\u003e","brand":"Inogen","offers":[{"title":"Single (4 Cell)","offer_id":52081629692220,"sku":"BA-400","price":1275.0,"currency_code":"USD","in_stock":true},{"title":"Extended (8 Cell)","offer_id":52081629724988,"sku":"BA-408","price":1375.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0846\/7329\/8748\/files\/inogen-g4-oxygen-concentrator.png?v=1781221978","url":"https:\/\/orderyoursupplies.com\/products\/inogen-one-g4-portable-oxygen-concentrator-used","provider":"Order Your Supplies","version":"1.0","type":"link"}