4020 vs 4028 vs 5028: How to Choose a Cooling Fan for Oxygen Concentrator Compressors

How to Choose 4020, 4028, or 5028? A Practical Guide to Cooling Fan Selection for Oxygen Concentrator Compressors

As oxygen concentrators become more compact, the compressor inside the equipment still has to keep working.

During operation, the compressor continuously generates heat through motor operation, mechanical movement, and air compression. For oxygen concentrators designed for long-term operation, the cooling fan may only be a few centimeters in size, but it plays an important role in removing heat from the equipment.

This leads to a common engineering question:

How should you choose between a 40×40×20 mm 4020 fan, a 40×40×28 mm 4028 fan, and a 50×50×28 mm 5028 fan?

Is a larger fan always better?

Is higher airflow always better?

Does higher static pressure automatically mean better compressor cooling?

Not necessarily.

For oxygen concentrator compressor cooling, fan selection should be based on a combination of installation space, airflow, static pressure, noise, power consumption, operating conditions, and long-term reliability.

JENTECH offers multiple cooling fan specifications, including 40×40×20 mm, 40×40×28 mm, and 50×50×28 mm models, providing engineers with more flexibility when designing thermal management systems for oxygen concentrators and compressor-based equipment.

1. Start with the Compressor: Why Does an Oxygen Concentrator Need Effective Cooling?

An oxygen concentrator is not typically a device that operates only occasionally.

During operation, the compressor continuously performs air compression and delivery processes. Mechanical movement, motor operation, and gas compression all generate heat.

If this heat cannot be removed efficiently, the thermal load inside the equipment may gradually increase:

Continuous compressor operation → continuous heat generation → heat accumulation → increased local temperature → deteriorated internal thermal conditions → potential impact on long-term operating stability

Therefore, the cooling fan in an oxygen concentrator is not simply a component that “blows air.”

It is part of the overall thermal management system.

Engineers need to consider questions such as:

• Can the fan effectively remove hot air around the compressor?

• Can sufficient airflow be maintained after passing through filters, grilles, and internal air ducts?

• Is the noise level acceptable during continuous operation?

• Can the fan operate reliably for extended periods?

• Will fan power consumption affect the overall power budget?

• If the available space is limited to 40 mm, should a 4020 or 4028 fan be selected?

• If an additional 10 mm of installation space is available, would a 50×50×28 mm fan provide a better solution?

These are the key questions behind oxygen concentrator cooling fan selection.

2. First Selection Criterion: Can the Fan Actually Fit?

The first rule of cooling fan selection is not airflow.

It is:

Confirm the mechanical dimensions first.

JENTECH offers the following three major dimensions:

In an oxygen concentrator, internal space is often limited.

The compressor may be surrounded by brackets, tubing, control boards, filters, and other structures. Even if a 5028 fan offers higher airflow, it may not physically fit into the available space.

Therefore, the first step should be to confirm:

Mounting hole spacing + overall dimensions + fan thickness + airflow direction + surrounding structures

The difference between a 40 mm and a 50 mm fan is not simply an additional 10 mm.

It may require changes to the mounting area, screw-hole locations, and surrounding mechanical structure.

3. The Same 4020 Size Can Have Very Different Performance

This is one of the most common mistakes in cooling fan selection.

Some engineers assume:

“If the dimensions are the same, the performance should be similar.”

In reality, this is not necessarily true.

For example, JENTECH's JC4020 series uses the same 40×40×20 mm frame size while offering multiple performance levels.

JC4020-01 Series — Representative Specifications

The difference is clear:

The same 4020 frame can cover maximum airflow from 4.11 CFM to 15.65 CFM.

Therefore, saying “I need a 4020 fan” is not enough to complete the selection.

The actual engineering requirement should be closer to:

40×40×20 mm + required airflow + required static pressure + acceptable noise level + system voltage

4. Why Consider the JC4020-02 Series?

When the oxygen concentrator has noticeable airflow resistance, the JC4020-01 series may not be the only option worth considering.

The JC4020-02 series also uses a 40×40×20 mm frame but provides a different performance range.

This creates a common engineering situation:

The available installation space is limited to 40×40×20 mm, but the cooling requirement is higher than a basic 4020 fan can provide.

In this situation, it may be worth evaluating a higher-performance model within the same frame size before redesigning the mechanical structure.

The JC4020-02 series reaches up to 26.8 CFM maximum airflow and 1.541 inH₂O maximum static pressure.

However, this does not mean that the highest-performance model should always be selected.

Higher performance is generally accompanied by changes in speed, power consumption, and noise.

5. What Does 4028 Offer? More Thickness Without Increasing the Footprint

If the 40×40 mm mounting footprint is fixed but the mechanical design allows the fan thickness to increase from 20 mm to 28 mm, the 4028 becomes an important option to evaluate.

The JC4028 maintains the 40×40 mm mounting area while increasing the fan thickness to 28 mm.

For example, the JC4028-02 series offers:

If the 40×40 mm mounting footprint is already defined and there is enough room for a 28 mm thick fan, the 4028 should be included in the evaluation.

It can be particularly useful when the system contains airflow resistance from filters, grilles, ducts, or other structural components.

In such applications, engineers should pay close attention to static pressure capability, rather than looking at free-airflow values alone.

6. The Common Selection Trap: Maximum Airflow Is Not Actual Airflow

This is one of the most important points in oxygen concentrator cooling fan selection.

The “maximum airflow” listed in a fan specification is normally measured under a specific test condition.

Once the fan is installed inside an oxygen concentrator, it operates within a real airflow system:

Air inlet + protective structure + filter + air duct + compressor structure + air outlet

All of these components can introduce airflow resistance.

Therefore:

A fan rated at 26.8 CFM does not necessarily deliver 26.8 CFM after installation in the equipment.

The actual operating point is determined by the interaction between the fan performance curve and the system resistance curve.

In simplified terms:

Fan performance curve × system resistance curve → actual operating point

Therefore, if an oxygen concentrator uses filters, narrow ducts, dense grilles, or restricted air passages, engineers should not select the fan based only on maximum airflow.

Static pressure capability is equally important.

7. Is 5028 Always the “One-Step-Up” Solution?

If the equipment allows a 50×50×28 mm installation area, the JC5028 series provides a significantly larger airflow range.

JC5028-01 Series

From the specifications, the 5028 clearly provides a higher airflow range than the 4020 and 4028.

But another selection trap appears here:

Higher airflow does not automatically mean a better solution for an oxygen concentrator.

If the actual cooling requirement is relatively low and the equipment is sensitive to noise, selecting a high-speed, high-airflow model may introduce unnecessary noise and power consumption.

Therefore, the 5028 should be considered when:

The system genuinely requires higher airflow capacity and the available installation space allows a 50×50×28 mm fan.

It should not be treated simply as “bigger is always better.”

8. Noise Matters — Especially for Oxygen Concentrators

Oxygen concentrators are different from many industrial machines.

They may be operated in environments where acoustic comfort is important. Therefore, the cooling fan cannot be selected solely according to maximum airflow.

Consider the JC4020-01 series:

Noise ranges from:

19.4 dBA → 29.0 dBA → 34.7 dBA → 42.2 dBA → 48.4 dBA

while maximum airflow increases from:

4.11 CFM → 7.43 CFM → 9.39 CFM → 12.52 CFM → 15.65 CFM

This illustrates an important engineering relationship:

Airflow, speed, noise, and power consumption are not independent parameters.

Therefore, cooling fan selection for oxygen concentrators should not simply become:

“Choose the fan with the highest airflow.”

A more practical approach is:

Meet the compressor cooling requirement first, then find the appropriate balance among airflow, static pressure, noise, and power consumption.

9. Why Pay Attention to Dual Ball Bearings for Long-Term Operation?

Oxygen concentrators may operate for extended periods, making the fan bearing structure another important selection parameter.

The JENTECH fans covered in this selection use:

Dual ball bearings (B)

The specified operating temperature range is:

-20°C to 70°C

The fan impeller and frame use:

PBT 94V-0

For oxygen concentrators, the cooling fan is not simply a disposable airflow component. It is part of the equipment's thermal management system and may need to operate continuously for long periods.

Therefore, fan selection should consider not only airflow and static pressure, but also:

bearing structure + operating temperature + material + long-term operating reliability

10. Do Not Look Only at Fan Price — Consider the Total Thermal Management Cost

The purchase price of the fan itself is only one part of the overall selection decision.

If the selected fan does not provide sufficient cooling performance, the equipment design may require:

• Additional fans

• Air duct modifications

• Larger air openings

• Structural changes

• Higher fan speed

• Additional thermal testing

• Additional acoustic testing

• Even a complete mechanical redesign

On the other hand, selecting an unnecessarily high-performance fan can introduce:

• Unnecessary power consumption

• Higher noise

• Higher BOM cost

• Potentially greater mechanical vibration

• Greater power supply design margin requirements

Therefore, the goal of fan selection is neither:

“Choose the cheapest fan.”

nor:

“Choose the highest-performance fan.”

The goal is:

“Choose the fan that solves the thermal requirement of the complete system.”

11. JENTECH: 4020, 4028, and 5028 Are Not Isolated Specifications

For oxygen concentrators, compressors, and other continuously operating equipment, fan size is only the first layer of selection.

JENTECH offers different performance levels across the 40×40×20 mm, 40×40×28 mm, and 50×50×28 mm platforms.

JC4020

The series covers 5 V, 12 V, and 24 V applications, with selected models available at 48 V.

Depending on the series, maximum airflow ranges from:

4.11 to 26.8 CFM

Maximum static pressure reaches:

1.541 inH₂O

This platform is suitable for applications where installation space is limited but multiple performance levels need to be evaluated.

JC4028

The series covers 12 V, 24 V, and 48 V.

Maximum airflow reaches:

28.12 CFM

Maximum static pressure reaches:

3.489 inH₂O

When the 40×40 mm mounting footprint is fixed but 28 mm thickness is available, the 4028 can be an important candidate.

JC5028

The series covers 12 V, 24 V, and 48 V.

Maximum airflow reaches:

50.9 CFM

Maximum static pressure reaches:

2.567 inH₂O

It is suitable for applications where a larger installation footprint is available and higher airflow is required.

12. JENTECH's Selection Approach: Start with the Equipment, Not the Model Number

For oxygen concentrator compressor cooling fan selection, the most important question is not simply:

“Should I choose 4020 or 4028?”

Instead, engineers should work through the following points.

① What is the available installation size?

First determine whether the available space supports 40×40 mm or 50×50 mm, and whether the fan thickness can be 20 mm or 28 mm.

② How much heat needs to be removed from the compressor?

Evaluate the thermal load based on compressor operating conditions, ambient temperature, and equipment structure.

③ How much airflow resistance does the system have?

Do not look only at maximum airflow. Static pressure capability must also be considered.

④ What is the allowable noise level?

If low-noise operation is important, avoid selecting a high-speed fan simply because it has a higher airflow rating.

⑤ What is the system voltage?

Different equipment platforms may use 12 V, 24 V, 48 V, or other power architectures. The fan voltage must match the system design.

⑥ Is the equipment designed for long-term operation?

Bearing structure, operating temperature, and product reliability should be evaluated as part of the overall selection process.

13. Selecting the Right Fan Early Is Better Than Correcting the Design Later

Cooling fan selection for an oxygen concentrator compressor may appear to be a simple choice among 4020, 4028, and 5028.

In reality, it involves a complete engineering chain:

Mechanical space → Thermal load → Airflow → Static pressure → Airflow resistance → Noise → Power consumption → Reliability → System validation

A mature selection process therefore does not begin by asking which model to buy.

It starts by defining the actual equipment requirements and then working backward to the appropriate fan specification.

Limited installation space? Start with 4020.

40×40 mm footprint fixed but 28 mm thickness available? Evaluate 4028.

Larger installation space available and higher airflow required? Consider 5028.

Within each platform, further selection should be based on:

Airflow + static pressure + speed + noise + power consumption + system voltage

There Is No Universal “Best” Choice Between 4020, 4028, and 5028

The objective of thermal management for an oxygen concentrator compressor is not to maximize fan specifications.

It is to remove the heat generated by the compressor in a stable and continuous manner.

4020 addresses compact installation requirements.

4028 provides additional thickness and performance options while maintaining the 40×40 mm footprint.

5028 expands the available airflow range when a larger installation footprint is possible.

JENTECH provides multiple sizes and performance levels of cooling fans for oxygen concentrators, compressors, and other equipment requiring continuous thermal management, supporting engineers from specification matching and parameter selection to application validation.

So, when the question comes up again:

“How should I choose between 4020, 4028, and 5028?”

The answer is not simply to choose a size.

Start with the equipment:

Check the available space, thermal load, airflow resistance, noise requirement, and power budget — then select the fan that best matches the actual system requirements.

That is the key to avoiding common mistakes in cooling fan selection for oxygen concentrator compressors.

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