Oxygen Tank vs Oxygen Concentrator: Which Is Right for You?
By Dr. Sarah Mitchell, Respiratory Equipment Specialist · Published 2025-02-18 · 12 min read
Compare oxygen tanks and oxygen concentrators side-by-side. Learn the pros, cons, costs, and ideal use cases for each oxygen delivery system to make the best choice.
The short answer: an oxygen tank stores a fixed, finite supply of compressed or liquid oxygen that runs out and must be refilled; an oxygen concentrator makes oxygen continuously from room air and never runs out as long as it has power. Tanks are lighter for very short outings but require ongoing refill deliveries; concentrators cost more upfront but eliminate refills and are the only option allowed on commercial flights.
Oxygen Tanks vs Oxygen Concentrators: Overview
Both oxygen tanks and oxygen concentrators deliver supplemental oxygen, but they work in fundamentally different ways. Understanding these differences helps you choose the right system for your lifestyle, prescription, and budget.
What Is an Oxygen Tank?
An oxygen tank (cylinder) stores compressed or liquid oxygen at high pressure. When you open the valve and attach a regulator, oxygen flows through tubing to your nasal cannula at the prescribed rate.
What Is an Oxygen Concentrator?
An oxygen concentrator draws in ambient room air, filters out nitrogen through molecular sieve beds, and delivers concentrated oxygen (90-96% purity) to you.
Head-to-Head Comparison
| Feature | Oxygen Tank | Oxygen Concentrator |
|---|---|---|
| Oxygen Source | Stored compressed gas | Extracted from room air |
| Supply Duration | Limited (hours) | Unlimited (with power) |
| Refills Required | Yes — regular delivery | No — makes its own oxygen |
| Weight | 5-150 lbs depending on size | 2.8-55 lbs depending on type |
| Portability | Limited by tank size | Portable units go anywhere |
| Air Travel | Prohibited on aircraft | FAA approved |
| Cost (Monthly) | $200-500 for refills | $0 (electricity only) |
| Cost (Upfront) | $50-200 per tank | $500-3,500 |
| Power Required | No | Yes (battery or wall outlet) |
| Safety Risk | High pressure, fire risk | Low risk |
| Noise Level | Silent | 36-48 dBA |
Advantages of Oxygen Tanks
1. No Power Required
Oxygen tanks work without electricity, making them essential for:
- Power outages and natural disasters
- Remote locations without electrical access
- Emergency backup when concentrators fail
2. Silent Operation
Tanks produce zero noise, ideal for:
- Light sleepers and bed partners
- Quiet environments (libraries, theaters, worship)
3. Higher Flow Rates Available
Large tanks can deliver flow rates up to 15 LPM, exceeding most concentrators' maximum output.
4. Lower Upfront Cost
Individual tanks cost $50-$200, making them accessible for short-term needs.
Advantages of Oxygen Concentrators
1. Unlimited Oxygen Supply
Concentrators never run out of oxygen as long as they have power. No scheduling deliveries, no counting tank hours, no anxiety about running low.
2. Long-Term Cost Savings
After the initial purchase, operating costs are minimal:
| Time Period | Oxygen Tanks | Concentrator |
|---|---|---|
| Month 1 | $200-500 (refills) | $2,500 (purchase) + $15 (electricity) |
| Year 1 | $2,400-6,000 | $2,680 |
| Year 3 | $7,200-18,000 | $3,040 |
| Year 5 | $12,000-30,000 | $3,400 |
3. Travel Freedom
Portable oxygen concentrators are FAA approved for air travel. Oxygen tanks are prohibited on commercial aircraft.
4. Safety
Concentrators have no high-pressure storage, no risk of explosive decompression, and no fire hazard from concentrated oxygen storage.
5. Independence
No reliance on delivery services, no scheduling around refill trucks, no storage of multiple heavy cylinders.
Common Oxygen Tank Sizes
| Tank Size | Duration at 2 LPM | Weight | Common Use |
|---|---|---|---|
| M6 (B) | ~1.5 hours | 3.4 lbs | Short trips |
| M9 (C) | ~2.5 hours | 5.4 lbs | Errands |
| D | ~3 hours | 7.9 lbs | Ambulatory |
| E | ~5.5 hours | 14 lbs | Extended use |
| M60 | ~15 hours | 22 lbs | Stationary |
| H/K | ~50 hours | 135 lbs | Home use |
Duration estimates at 2 LPM continuous flow with 100% fill
When to Choose an Oxygen Tank
- Short-term oxygen need — Post-surgery recovery or temporary illness
- Emergency backup — Power outage preparation
- Very high flow rates — Prescriptions above 5-10 LPM continuous
- Noise-free requirement — Environments requiring absolute silence
- Budget constraint — Need immediate oxygen with low upfront cost
When to Choose an Oxygen Concentrator
- Long-term oxygen therapy — COPD, pulmonary fibrosis, or chronic hypoxemia
- Active lifestyle — Walking, traveling, socializing
- Air travel — Flying domestically or internationally
- Cost-conscious — Avoiding recurring monthly refill fees
- Independence — Eliminating delivery schedules and tank management
The Best of Both Worlds
Many oxygen patients use both systems:
- Primary: Home oxygen concentrator for 24/7 therapy at home
- Portable: Lightweight POC (Inogen G5 or CAIRE FreeStyle) for outside activities
- Backup: E-cylinder oxygen tank for power outages or emergencies
This three-tier approach provides maximum safety, flexibility, and independence.
Making the Switch from Tanks to Concentrators
If you currently use oxygen tanks and want to switch to a concentrator:
- Verify your prescription — Ensure your flow rate is within concentrator range
- Choose the right type — Portable for mobility, stationary for home
- Keep one backup tank — Essential for power outage preparedness
- Update your supplier — Cancel scheduled tank deliveries
- Notify your utility company — Register as a medical equipment user for power outage priority
Browse our oxygen concentrators and oxygen tanks or call (877)699-4365 for personalized guidance.