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Oxygen Refill Systems

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What is an oxygen refill system?

Oxygen Cylinder Refill Stations are also known as oxygen transfill systems or homefill oxygen devices. Oxygen refill stations are portable oxygen cylinder refill devices used at home to fill empty oxygen tanks. These oxygen refill machines utilize concentrated oxygen extracted from room air using oxygen concentrator technology. ReFill systems pressurize the concentrated oxygen to fill empty oxygen tanks. This allows you to safely refill oxygen cylinders within your own home, providing you with unlimited, refillable oxygen. Oxygen therapy patients can obtain more freedom to come and go as they please and no longer need to depend upon a local oxygen vendor to refill their empty oxygen tanks.

DeVilbiss iFill Personal Oxygen Refill Station

Why use an oxygen refill system?

The ability to fill oxygen cylinders at home provides greater independence and freedom for oxygen patients. Home oxygen eliminates time-consuming and costly service calls often associated with oxygen tank pickup and deliveries. By filling your own oxygen tanks, you control your own schedule and are not dependent upon a third party. Come and go as you please, knowing that another filled oxygen cylinder is always ready for use.

When can you use an oxygen refill system?

Empty oxygen cylinders may be refilled while you sleep, while you are away shopping or anytime that you have an empty cylinder that requires refilling. You can refill empty oxygen tanks day or night. Just place the cylinder in the refill machine and turn it on. When the cylinder is refilled you can start using it or place it in reserve for when you are ready. With your own oxygen refilling station, you no longer have numerous empty oxygen tanks lying around waiting for the local oxygen vendor to come by to pick them up. An oxygen refill system gives you more freedom and choices and allows you to work your own schedule independent of third parties

Where can you use an oxygen transfill system?

Oxygen refill stations can be used at home, the office, an RV or even a boat. Where ever you have access to a 110-120 volt AC electrical system, you may refill oxygen tanks. Just plug it in and turn it on!

Who makes oxygen transfill stations?

Currently three manufacturers produce home oxygen refill systems. These manufacturers are Invacare, Respironics and Drive Medical/DeVilbiss.

Invacare HomeFill

The Invacare HomeFill Compressor was the first oxygen transfill device for home use. The HomeFill has been around for nearly a decade and is the most well know home and most popular oxygen refill compressor. The HomeFill is a multi-stage pump that compresses oxygen from an oxygen concentrator to refill empty oxygen cylinders. Invacare also manufactures oxygen concentrators and other respiratory devices.

DeVilbiss iFill

A few years ago, DeVilbiss developed the iFill Personal Oxygen Refill Station. The iFill offers the added advantage of having a built-in oxygen concentrator rather than depending upon a separate oxygen concentrator to supply the tank compressor with oxygen. Additionally, the iFill is equipped with a large cylinder release ring designed for individuals with limited dexterity. Combined with a low price, the iFill offers a great solution for home oxygen therapy patients who want to refill their oxygen cylinders at home.

Drive Medical PureFill

The Purefill can operate with any oxygen concentrator that has a transfill port and produces an oxygen concentration greater than 90%, making it compatible with the Pure Oxygen Concentrator, Respironics EverFlo, the Invacare Perfecto 2 or the Platinum 10. This transfill device operates at 55 decibles of noise and comes with a 3 year warranty. Weighing 35 pounds, the PureFill can fill an empty M6 oxygen clinder in 80 minutes.

Respironics UltraFill

New on the scene is the Respironics UltraFill. Respironics has had some time to size-up the competition and develop an oxygen refill system that features many advantages above the current market offerings. For example, empty oxygen cylinders can be placed on the UltraFill with just one hand. Oxygen cylinders are easy to connect and disconnect for people of all ages. Its intuitive design makes it easy to use and requires less service to maintain. This refill system automatically detects whether the cylinder is a 2,000 or 3,000 psi cylinder and adjusts accordingly. Cylinders that are partially full can be topped off. The advanced performance and operating factors discussed below make the UltraFill an excellent choice.

How do the four home oxygen refill stations compare?

All four transfill systems are somewhat similar. They all come with a 3 year warranty and three can operate to at least 6,000 feet above sea level or higher. (No data from Drive Medical is available for the maximum operating altitude for the PureFill.) All can provide oxygen concentration of 90% or higher. All three can refill an M6 size oxygen cylinder in 80 minutes or less. Three of the four refill machines require proprietary cylinders to refill. The PureFill, according to Drive Medical, may be used to refill any M4, M6, M9 and D cylinders. Although similar in many ways, there are differences.

The Size Difference

The DeVilBiss iFill is the largest machine, but it also has a built-in oxygen concentrator. If you add in the size of an oxygen concentrator to the other two refill stations, the iFill will be the smallest size. The Invacare HomeFill is the most lightweight at 33 pounds. The Respironics UltraFill has the smallest size without factoring in the size of an oxygen concentrator.

Size Comparison Invacare
Drive Medical
Width (inches) 20.25 12.25 23 20
Length (inches) 15 28.5 22 9
Height (inches) 16 22.5 8 25.5
Total Cubic Inches 4,860 7,855 4,048 4,590
Weight (pounds) 33 66 35 45

The Performance Difference

Both the iFill and the UltraFill provide oxygen concentration levels between 90 to 96%. Invacare only provides the specification that the HomeFill offers an oxygen concentration level of 90% and above. The UltraFill provides the highest operating altitude at 7,500 feet above sea level while the iFill comes in second at 6,562 feet.

Performance Comparison Invacare
Drive Medical
Oxygen Concentration 90% or higher 90 to 96% 90% or higher 90 to 96%
Operating Altitude 6,000 6,562 N/A 7,500

DeVilbiss iFill Oxygen Refill System

The Operating Factors Difference

In this comparative category, the Respironics Ultrafill makes a clean sweep. It emits the lowest noise level of 44 decibels, consumes the least amount of power at 110 watts while producing the highest maximum pressure of 3,000 PSI. The Ultrafill refills the M6 oxygen cylinder in 65 minutes--10 minutes less than the iFill or the HomeFill.

Operating Factors Comparison Invacare
Drive Medical
Noise NA 50 55 44
Power Consumption 200 400 110 110
Refill Time (Minutes to Fill M6 Cylinder) 75 75 80 65
Maximum Pressure (PSI) 2,000 ± 100 2,250 2,000 3,000

The Compatibility Difference

All three manufacturers recommend using only their own proprietary oxygen cylinders with their oxygen refill systems. Invacare and Respironics also recommend only using their own 5 liter and above oxygen concentrators with their refill systems. The DeVilbiss iFill does not need an additional oxygen concentrator.

The Dependability Difference

The Respironics UltraFill comes with a 3 year warranty. The DeVilbiss iFill also comes with a 3 year warranty but is limited to 3,000 hours of operation. The Invacare HomeFill comes with the shortest warranty of 1 year on the compressor and 3 years or 5,000 hours on parts and labor on internal wear components and control panel components.

Special Features Difference

The UltraFill has the capability of refilling both 2,000 PSI oxygen cylinders as well as 3,000 PSI cylinders. The iFill and HomeFill can only refill 2,000 PSI cylinders. The iFill has its own internal oxygen concentrator while the HomeFill and the UltraFill require a separate purchase of a home oxygen concentrator of 5 liters or more to supplement their oxygen refill device. The iFill comes with a user-friendly, large cylinder release ring designed for individuals with limited dexterity. The release ring requires very little pressure to depress, making it easy to install and remove oxygen cylinders.

Ranking the Home Oxygen Refill Machines

Invacare HomeFill Oxygen Compressor System

Invacare HomeFill
#1 Lowest Weight

DeVilbiss iFill
#1 Stand alone unit, requires no oxygen concentrator
#1 Tied for highest oxygen concentration levels

Drive Medical PureFill
#1 Smallest Size
#1 Tied for lowest power consumption
#2 Low weight
Compatible with any M4, M6, M9, or D cylinder

Respironics UltraFill
#1 Tied for highest oxygen concentration levels
#1 Highest operating altitude capability
#1 Lowest noise
#1 Lowest power consumption
#1 Fastest refill time
#1 Highest pressure capability, can refill 3,000 psi tanks
#1 Best warranty, 3 years with no maximum hours
#2 Small Size
#2 Low Weight

Ranking Summary

The Respironics UltraFill runs away from the competition with many number 1 rankings. The features of the UltraFill and its performance are remarkable. But, it is also the highest priced transfill system and requires a separate oxygen concentrator in order to function, making it even more expensive. While offering the best performance and best operating factors, the UltraFill is challenged by the stand alone capability of the DeVilbiss iFill. The iFill is also priced significantly lower than the UltraFill. When adding the price of an oxygen concentrator to the already high price of the UltraFill, it is likely that most consumers will choose the iFill over the UltraFill on the basis of value.

Below is a chart that shows the specifications for each transfill station and provides a side-by-side comparison. Highlighted cells depict category leaders.

Transfill Comparison Chart

Transfill Oxygen Refill Comparison

Burt Cancaster, Author

Vitality Medical
7910 South 3500 East, Suite C
Salt Lake City, UT 84121
(801) 733-4449
[email protected]

Burt Cancaster Profile