Oxygen Concentrator vs Oxygen Tank: Which Is Better for Home Use?

By Yashil Bhatt, RRT, Licensed Registered Respiratory Therapist (Georgia & South Carolina) and owner of My Respiratory Company, serving Augusta, Evans, Aiken and Columbia, and shipping nationwide. Last updated: October 28, 2026.

Quick answer: For most people using oxygen every day at home, an oxygen concentrator is the better everyday choice. It makes oxygen from room air, never needs refills and costs less over time. An oxygen tank is better as a backup for power outages and for patients who need higher flow rates. Your prescription decides which one is right for you.

When you are prescribed oxygen, you will usually hear two options: a concentrator or a tank (also called a cylinder). Both deliver medical oxygen through a nasal cannula, but they work very differently. As a respiratory therapist, I help patients choose between them every week. Here is a plain-language comparison.

What Is the Difference Between an Oxygen Concentrator and an Oxygen Tank?

An oxygen concentrator is an electric device that pulls in room air, removes most of the nitrogen and delivers oxygen-enriched air. It produces oxygen continuously as long as it has power. An oxygen tank is a metal cylinder that stores a fixed amount of compressed oxygen. Once it is empty, it must be refilled or replaced, but it needs no electricity.

Oxygen Concentrator vs Tank at a Glance

Feature Oxygen concentrator Oxygen tank
Oxygen source Makes oxygen from room air Stored compressed oxygen
Runs out? No, as long as it has power Yes, needs refills or swaps
Needs electricity Yes (plug-in or battery) No
Oxygen purity About 87 to 95% About 99% or higher
Upfront cost Higher Lower
Ongoing cost Electricity and replacement parts Refills and tank replacement
Air travel Many portable models are FAA approved Not allowed on planes
Best for Daily home use and travel Backup supply and high-flow needs

Which One Is Better for Home Use?

For daily home use, most patients do better with a concentrator. You never have to track how much oxygen is left, schedule deliveries or swap cylinders. A stationary unit like the VH-3 Home Oxygen Concentrator (1 to 5 LPM, 24/7 duty rated) can run around the clock. If you are not sure how many hours you should be on oxygen, read How Many Hours a Day Should You Use an Oxygen Concentrator?

When a Tank Is the Better Choice

  • Power outages: Tanks work with no electricity. Many patients keep a backup cylinder even when they use a concentrator. Ask your provider how many hours of backup your flow rate gives you.
  • High flow needs: Home concentrators are limited in how much flow they can deliver. Patients who need higher flow than a concentrator provides may need cylinders or another system.
  • Highest purity: Tanks deliver near-pure oxygen. A concentrator at a normal flow setting is still fully appropriate for most patients, but your prescription may specify otherwise.

Cost: Concentrator vs Tank

A concentrator costs more upfront but has no refill costs. A tank costs less to start, but refills and replacements add up over time. A concentrator does use electricity. Home models typically draw somewhere in the range of 100 to 600 watts depending on the model, so check the specs of the one you buy. For a deeper look at coverage, read Medicare vs paying out of pocket for oxygen therapy.

Portability and Travel

Portable concentrators weigh a fraction of what a filled portable cylinder system does and can run on batteries, car power or a wall outlet. Oxygen tanks cannot be taken on airplanes, while many portable concentrators are FAA approved. See how to travel with a portable oxygen concentrator (FAA rules) and portable vs home oxygen concentrators. Battery life varies; single-battery units commonly last roughly 2 to 6 hours and double-battery units roughly 5 to 13 hours.

Safety With Both

  • No smoking, candles or open flames near oxygen. Oxygen makes fire burn hotter and faster.
  • Keep equipment several feet away from heaters, stoves and other heat sources.
  • Use water-based lubricant on your nose, never petroleum jelly.
  • Store cylinders upright and secured so they cannot fall.
  • Never change your flow rate unless your doctor tells you to. See What LPM Oxygen Flow Rate Do I Need?
  • Keep your concentrator clean and serviced with our maintenance schedule, and confirm your levels with a home pulse oximeter.

Build a Power Outage Plan

Storm season and outages are real across Georgia and South Carolina. If you use a concentrator, keep fully charged batteries and ask your provider about a backup cylinder sized for your flow rate. Tell your electric utility you use medical equipment, and keep your doctor and equipment provider numbers by the phone.

Where to Buy an Oxygen Concentrator

My Respiratory Company is owned by a licensed RRT and can match a device to your prescribed flow rate. We ship nationwide and serve Augusta, Evans, Aiken and Columbia locally. Browse:

RRT-recommended equipment

Not sure which fits your prescription? Book an Oxygen Therapy Education session or a COPD Education session with a licensed RRT, see our respiratory services, or call 706-772-0263. Also read our COPD home oxygen therapy guide.

Key Takeaways

  • Concentrators make oxygen from room air and never run out while powered; tanks store a fixed supply.
  • Concentrators are usually better for daily home use and travel; tanks are a strong backup.
  • Tanks need no power but need refills; concentrators need power but no refills.
  • Plan for outages with batteries or a backup cylinder.
  • Your prescription, not price or convenience alone, decides the right device.

Frequently Asked Questions

Is an oxygen concentrator better than an oxygen tank?

For most daily home users, yes, because it never needs refills and costs less over time. A tank is better as a backup and for patients who need higher flow rates.

Does an oxygen concentrator give the same oxygen as a tank?

Both provide medical oxygen. Tanks deliver about 99% or higher purity, while concentrators typically deliver about 87 to 95%, which is appropriate for most prescriptions at normal flow settings.

What happens to a concentrator if the power goes out?

A plug-in concentrator stops. Keep charged batteries or a backup oxygen cylinder, and call your provider for a plan.

Can I fly with an oxygen tank?

No. Oxygen tanks are not allowed on airplanes, but many portable concentrators are FAA approved. Check with your airline before you travel.

Which is cheaper, a concentrator or a tank?

Tanks cost less upfront, but refills add up. Concentrators cost more upfront but are usually cheaper over time.

Do I need a prescription for oxygen?

Yes. Oxygen is prescribed by a doctor, who sets your flow rate and hours of use.

Sources

Medical disclaimer: This article is for general education and is not medical advice. Your oxygen prescription, flow rate and equipment are set by your healthcare provider. Always follow their instructions and call 911 in an emergency.