Introduction
In critical environments such as industrial, medical, and high-clean manufacturing, HEPA Filter were developed to make filtration reliable, predictable, and verifiable. It has demonstrated irreplaceable advantages in meeting demanding air filtration requirements. But choosing the wrong grade, pseudo-HEPA, can be a waste of money and can result in substandard cleanliness, which in turn affects product quality and poses compliance risks.
This blog briefly analyzes the necessity, identification, rating and application of HEPA filters to help you quickly understand Hepa filters and their performance, so as to choose the right HEPA filter for the right case.
Benefits of HEPA Filter
The full name of HEPA is High Efficiency Particulate Air, which stands for an air filtration standard that can be used to measure a filter’s performance in capturing small particles.
HEPA filters are able to remove smaller particles from the air in a smaller volume than ordinary air filters, playing a key role in high-standard environments such as cleanrooms.
The core advantages of HEPA Filter are as follows.
HEPA Filter achieves high efficiency particle capture
If you need to deal with micron and submicron particles, ordinary filtration will fail, while HEPA Filter can effectively remove airborne particles ≥0.3 micron.
HEPA Filter with verifiable performance
HEPA Filter has strict design standards and test methods.
HEPA Filter makes air factors controllable
Equipped with HEPA Fliter, clean rooms, laboratories, and production environments can control particulate concentration within a defined range, which in turn safeguards human health, protects equipment, reduces the frequency of equipment downtime, ensures product quality, and reduces the risk of product contamination and obsolescence.
When is a Hepa Filter Necessary?
HEPA filters provide high filtration performance at a significantly higher purchase and operating cost than conventional filters. Therefore, it is necessary for you to know when HEPA is “essential” rather than “over-equipped”. Thus, you can use HEPA only in essential situations to ensure system performance and control overall costs.
HEPA is often a necessary option if any of the following scenarios apply to your use.
The space has a cleanliness level requirement
Pharmaceutical plants, aseptic filling areas, semiconductor manufacturing, medical device assembly, precision electronics manufacturing, and some other places that have a clear standard for the number of airborne particles (ISO 14644, GMP specifications), it is basically impossible to meet the cleanliness standards without HEPA class H13/H14.
Involving aseptic or biosafety operations
Operating rooms, ICU wards, biological laboratories, vaccine production, animal testing centers, these places involving personnel safety, HEPA Filter is usually also necessary.
Products are extremely sensitive to fine dust
Chip manufacturing, optical lens production, OLED / LCD production, precision instrument assembly scenarios, particles will affect product quality, resulting in product obsolescence. At this time, the choice of hepa dilter is not just to improve the air, but directly affect the yield and profit.
Need to pass the audit or certification
GMP audit, ISO clean room certification, medical institutions acceptance, manufacturing customers factory inspection are inseparable from the HEPA Filter.
Failure of filtration can have serious consequences
Chemical laboratories, powder handling plants, highly contaminated industrial areas, medical isolation wards, all scenarios where high risk contaminants are present in the air, HEPA is an important barrier to control exposure.
How to Recognize a True HEPA Filter
There are some air purifiers or ordinary filters labeled HEPA-like / HEPA-type / True HEPA in the market, its actual efficiency may be only 70-85%, and should be carefully identified when purchasing.
Pseudo HEPA Filters Explained
HEPA-like can only capture larger particles and does not guarantee the efficiency of capturing 0.3 μm particles.
HEPA-type is only similar to HEPA in appearance or fiber material.
True-HEPA but no test data may bring inefficient filtration problems or poor installation sealing.
Only those that have passed strict standard tests and have data to prove it are true HEPA filters, please pay attention to the distinction.
True HEPA Filter
Understanding the following will help you to confirm the True HEPA Filter.
The core criterion of True HEPA filter is to achieve a certain efficiency for the most difficult particles (MPPS ≈ 0.3 μm).
True HEPA (especially EN1822 H13-H14) must usually be scanned unit by unit in high-cleanliness applications and have a traceability report.
HEPA Filter Classes (H10-H14) and Recommended Applications
The filtration capacity of HEPA filters increases step by step from H10 to H14 (strictly defined, only H13-H14 are True HEPA). The higher the rating, the finer the particles will be intercepted. Accordingly, the scenarios in which they are used gradually transition from general air improvement to specialized environments where there is little room for error in air cleanliness.
H10 Hepa Filter
The H10 Hepa Filter is sort of the starting point for high efficiency filtration. It will help you catch most dust and pollen, and is suitable for spaces that are not particularly stringent, such as industrial primary air cleaning or general ventilation systems.
H11 Hepa Filter
H11Hepa Filter, with better filtration, can catch smaller particles such as some bacteria, suitable for your home air purifier, commercial fresh air system, general industrial environment.
H12 Hepa Filter
H12Hepa Filter is highly efficient in filtering small particles, it can catch particles and some bacteria, it can cope with higher cleanliness requirements. It is suitable for use in laboratories, medical support areas, and factories with clear requirements for cleanliness.
H13 Hepa Filter
The H13Hepa Filter is the most commonly used filter for high cleanliness environments, blocking almost all particles, including bacteria-attached particles. Even if you are in a high clean environment such as medical, pharmaceutical, clean room, clean room, electronics, etc., it can meet the appropriate air quality requirements.
H14 Hepa Filter
H14Hepa Filter belongs to the ultra-high efficiency filtration, which can capture almost all tiny particles and is suitable for zero-tolerance environments, such as pharmaceuticals, semiconductor ultra-clean rooms, pharmaceutical aseptic production, and biosafety laboratories.
| Level&Efficiency（0.3 μm） | Advantages | Typical Applications | When to Use |
| H10≥85% | Cost friendly | Industrial Primary Air Purification | Non-Critical Production |
| H11≥95% | High comfort | Residential air purifiers, commercial fresh air | General-industrial, domestic, commercial |
| H12≥99.5% | stability | Laboratory, paramedical | Medium-cleanliness requirement scenarios |
| H13≥99.95% | Highly clean, verifiable | Operating room, clean room, pharmaceutical | High-standard clean environment |
| H14≥99.995% | Highest standard | Ultra-clean room, semiconductor, aseptic production | Zero-tolerance environment, critical production |
Conclusion
HEPA Filter is the solution for highly effective control of micron and submicron particle contamination. Selecting the right grade of Hepa Filter is the key to ensuring clean air, stable equipment, high product qualification rates and regulatory compliance.
Understanding the performance differences and application scenarios of HEPA Filter is a prerequisite for engineers and purchasing managers to make an efficient and safe selection.
Then you can quickly identify the right grade of HEPA Filter for your project’s cleanliness requirements and select a reliable supplier to match the most appropriate Hepa Filter, avoiding cost waste and risk.
FAQ
Q1.What are the precautions when using Hepa Filter?
After selecting a suitable Hepa Filter, proper use is the key to effective performance.
- First of all, make sure that the sealing is tight.
It is recommended to conduct a sealing inspection after installation, focusing on these must-tight joints between the frame and ducts, and the purifier housing.
- Avoid excessive wind speed or air volume
During operation, pay attention to the fact that the wind speed cannot exceed the maximum allowable value of the HEPA design, otherwise it will increase the pressure drop and shorten the life of the filter material.
- Regular replacement and maintenance
Regularly check the pressure difference according to the use of the environment, and replace the filter with deteriorated performance in a timely manner.
- Avoid direct exposure to high humidity and corrosive environments
HEPA fibers are susceptible to water vapor, chemical corrosion, and special environments need to use moisture-proof, acid and alkali treatment of Hepa filters.
- Correct storage
Ensure that Hepa filters are stored in dry and clean environments, avoiding pressure, folding, or collision. Avoid pressure, folding or collision.
Q2. Is a higher HEPA rating better?
A higher rating does mean more adequate filtration. However, we should also consider the requirements of the application scenario.
For example, although H14 is more efficient than H13, it also has a higher resistance, and in the case where the actual use of H13 grade filters can meet the clean air requirements, a higher grade HEPA filter does not mean a better choice.
