Air Filter Manufacturer and HEPA Filter Provider

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EV Charging Stations

Filtration for Power Equipment

Cleanroom & Semiconductor

Ultra-High Cleanliness Filtration

Commercial HVAC

Central Air System Filtration

Data Centers

Precision Equipment Protection

Livestock & Farming

Farming Environment Purification

Spray Booths & Industrial Dust

Paint Mist & Dust Purification

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EV Charging Stations Industry Application

Filtration for Power Equipment

Professional air filtration for EV charging devices, protecting against dust and sand ingress to ensure stable, reliable operation of charging piles and station infrastructure.

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Cleanroom & Semiconductor Industry Application

Ultra-High Cleanliness Filtration

Ultra-high efficiency filtration for semiconductor wafer fabs and precision electronics cleanrooms, capturing nano-scale particles to meet ISO Class 1–3 standards and maximize product yield.

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Commercial HVAC Industry Application

Central Air System Filtration

High-efficiency filtration for commercial building HVAC systems, improving indoor air quality, reducing energy consumption, and extending equipment service life.

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Data Centers Industry Application

Precision Equipment Protection

Precision air filtration for data centers, shielding servers and critical hardware from dust contamination to keep cooling systems running efficiently and reliably.

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Livestock & Farming Industry Application

Farming Environment Purification

Dedicated filtration systems for farms and livestock facilities — capturing dust, adsorbing ammonia, and inhibiting pathogen spread to improve animal health and overall productivity.

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Spray Booths & Industrial Dust Industry Application

Paint Mist & Dust Purification

Designed for spray booths and grinding workshops, efficiently capturing paint mist, metal dust, and wood chips to meet emission standards while protecting finished surface quality.

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HEPA Filters

Q: What is a HEPA filter?

HEPA stands for High-Efficiency Particulate Air. A HEPA filter is rated at the most penetrating particle size, around 0.3 µm, where it has to remove at least 99.97% of the particles to meet the US HEPA definition, or H13 and above in the EN 1822 classification. Whalesens builds them from H13 through U17, in deep-pleated, mini-pleated, V-bank, high-temperature panel and liquid-tank gel-seal constructions.

Q: What does a HEPA filter do?

It captures fine airborne particles — dust, smoke, pollen, mould spores and bacteria — by interception, impaction and diffusion as the air passes through a glass-fibre pleat pack. Our HEPA grades are declared for particles ≥0.5 µm, ≥0.3 µm and, from the U-grades up, ≥0.1 µm. It does not remove gases, vapours or odours: that needs an activated carbon stage in series.

Q: How to clean a HEPA filter?

Industrially, you do not clean it — you look after it until it is spent. Vacuum the upstream face at low pressure or blow clean, dry air from the clean side to remove loose dust, and replace the filter when the resistance reaches the final value declared for its grade. Wet cleaning is not a service method: the glass-fibre media loses efficiency once it is wetted and the seal between pleat pack and frame is where leaks start. Where the process allows, fit a washable pre-filter upstream and clean that instead.

Q: Can you wash a HEPA filter?

No. Our HEPA filters are sealed cartridges — the pleat pack is bonded into the frame with PU two-component adhesive or a liquid gel seal, and both the media and the seal are damaged by washing. Washing a HEPA filter is the usual cause of a filter that still looks clean but no longer holds its grade, which is why HEPA cartridges are replaced rather than reconditioned.

Q: What is a true HEPA filter?

"True HEPA" is a consumer-market phrase, not a classification: it means the filter meets the HEPA definition of 99.97% at 0.3 µm, as opposed to "HEPA-type" or "HEPA-like" media that is only tested to a lower standard. Our industrial range is specified by grade — H10 to H14 and U15 to U17 — because a declared grade with a tested efficiency is what a cleanroom or a GMP audit can actually accept.

Q: How often to change a HEPA filter?

Change on pressure drop, not on a calendar. A HEPA filter is spent when its resistance reaches the final value declared for the grade — typically two to three times the clean initial resistance — or when the airflow the installation needs can no longer be held. In cleanrooms and GMP areas the change interval is also driven by the documented leak test and by the room classification: a filter that passes its grade but fails an integrity scan is replaced regardless of resistance.

Q: What is HEPA filter full form?

HEPA is the abbreviation of High-Efficiency Particulate Air; you will also see it written as High-Efficiency Particulate Arrestance or High-Efficiency Particulate Absorbing. All three describe the same filter class: a pleated media filter rated at the most penetrating particle size of about 0.3 µm.

Q: What is the micron size of a HEPA filter?

HEPA efficiency is defined at the most penetrating particle size, around 0.3 µm — the size at which a filter of this type is weakest, so passing at 0.3 µm means passing at both larger and smaller particles. Our product data declares removal for ≥0.5 µm and ≥0.3 µm particles across the H-grades, and for ≥0.1 µm on the U-grades; the grade letters, not a single micron figure, are what the standards are written against.

Whalesens supplies HEPA and ULPA filters from H13 through U17 for cleanrooms, pharmaceutical production, spray booths, data centers and commercial HVAC. The range covers deep-pleated, mini-pleated, V-bank, high-temperature panel and liquid-tank gel-seal constructions, in aluminium, stainless steel or hot-melt sealed frames.

Every type is built to order: choose the filtration grade, frame material, gasket and size for your installation. Send us your airflow, efficiency target and duct dimensions and we will quote a configuration.

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HEPA Filters range

Selection table

Model	Filtration grade	Media	Frame	Temperature	Moisture
350 Degree High Temperature Pleated Panel HEPA Filter	H13 (EN 1822)	Special glass fiber filter paper	1.5 mm 304 stainless steel	≤350 °C	100% RH
250 Degree High Temperature Pleated Panel HEPA Filter	H10, H11, H12, H13, H14	Ultrafine glass fiber filter paper	Aluminum profile, stainless steel or galvanized frame	≤250 °C	100% RH
V-Bank HEPA Filter	F9, H10, H13 and H14 in the standard size table; the family also covers M6, F7, F8, H15, H16 and UH17 to UH19	Ultrafine glass fibre filter paper	Galvanised steel, aluminium or stainless steel	≤80°C	100% RH
Liquid Tank HEPA Filter	H13, H14, U15, U16, U17 (EN779)	Ultra-fine glass fibre paper, mini-pleated	Aluminium alloy or stainless steel	≤ 80 °C	100% RH
Deep Pleated HEPA Filter	F6, F7, F8, F9, H10, H13, H14; MERV11 to MERV16-19	High-density paper made with ultra-fine glass fiber	Galvanized steel, aluminum or ABS plastic	≤80 °C	100% RH
Mini-Pleated HEPA Filter	H13, H14, U15, U16; UH17 to UH20; MERV17 to MERV20	Ultrafine glass fibers or HE PP paper	Aluminum, stainless or galvanized steel	≤80 °C	100% RH

How it compares

HEPA vs activated carbon

A HEPA stage removes particles; an activated carbon stage removes gases, vapours and odours. They are complementary rather than alternatives, which is why chemical laboratories, coating lines and cleanrooms usually run a carbon panel or a carbon bag filter ahead of, or behind, the HEPA terminal filter. If your problem is smell or solvent, HEPA alone will not fix it; if your problem is particles, carbon alone will not either.

HEPA vs ULPA

ULPA sits above HEPA: the same construction, a tighter media grade and a higher efficiency at the most penetrating particle size. The trade-off is resistance and airflow — a ULPA grade costs more pressure drop for the same face area, so fan energy goes up. Choose ULPA only where the classification or the process demands it; our H13 to U17 grades are built in the same frames, so the decision can be deferred to the size table.

MERV vs HEPA

MERV is an ASHRAE 52.2 rating; HEPA is an EN 1822 / ISO 29463 classification. They are measured on different test dusts and different particle sizes, so a MERV number cannot be converted into an H-grade. As a rule of thumb MERV 13-16 covers fine filtration in general HVAC, while H13 and above is terminal filtration for cleanrooms, and the two are used in series rather than chosen against each other.

Where it is used

Cleanrooms and semiconductor

Terminal filtration for ISO Class 5-8 rooms, wafer fabs, display lines and laminar flow benches, where the filter is the last barrier before the product.

Cleanroom filtration solutions →

Pharmaceutical and healthcare

GMP cleanrooms, sterile filling, operating theatres and isolation rooms, where filter integrity is documented with a leak test at commissioning.

Pharmaceutical HEPA case →

Spray booths and coating lines

Ceiling and terminal HEPA downstream of the paint-arrestor stages, so overspray is captured before it reaches the HEPA media.

Paint spray booth case →

Data centers and commercial HVAC

High-efficiency final stages for computer rooms, laboratories and public buildings, usually paired with a carbon stage where outdoor air quality is poor.

Data center HVAC solutions →

FAQ

What is a HEPA filter?

HEPA stands for High-Efficiency Particulate Air. A HEPA filter is rated at the most penetrating particle size, around 0.3 µm, where it has to remove at least 99.97% of the particles to meet the US HEPA definition, or H13 and above in the EN 1822 classification. Whalesens builds them from H13 through U17, in deep-pleated, mini-pleated, V-bank, high-temperature panel and liquid-tank gel-seal constructions.

What does a HEPA filter do?

It captures fine airborne particles — dust, smoke, pollen, mould spores and bacteria — by interception, impaction and diffusion as the air passes through a glass-fibre pleat pack. Our HEPA grades are declared for particles ≥0.5 µm, ≥0.3 µm and, from the U-grades up, ≥0.1 µm. It does not remove gases, vapours or odours: that needs an activated carbon stage in series.

How to clean a HEPA filter?

Industrially, you do not clean it — you look after it until it is spent. Vacuum the upstream face at low pressure or blow clean, dry air from the clean side to remove loose dust, and replace the filter when the resistance reaches the final value declared for its grade. Wet cleaning is not a service method: the glass-fibre media loses efficiency once it is wetted and the seal between pleat pack and frame is where leaks start. Where the process allows, fit a washable pre-filter upstream and clean that instead.

Can you wash a HEPA filter?

No. Our HEPA filters are sealed cartridges — the pleat pack is bonded into the frame with PU two-component adhesive or a liquid gel seal, and both the media and the seal are damaged by washing. Washing a HEPA filter is the usual cause of a filter that still looks clean but no longer holds its grade, which is why HEPA cartridges are replaced rather than reconditioned.

What is a true HEPA filter?

"True HEPA" is a consumer-market phrase, not a classification: it means the filter meets the HEPA definition of 99.97% at 0.3 µm, as opposed to "HEPA-type" or "HEPA-like" media that is only tested to a lower standard. Our industrial range is specified by grade — H10 to H14 and U15 to U17 — because a declared grade with a tested efficiency is what a cleanroom or a GMP audit can actually accept.

How often to change a HEPA filter?

Change on pressure drop, not on a calendar. A HEPA filter is spent when its resistance reaches the final value declared for the grade — typically two to three times the clean initial resistance — or when the airflow the installation needs can no longer be held. In cleanrooms and GMP areas the change interval is also driven by the documented leak test and by the room classification: a filter that passes its grade but fails an integrity scan is replaced regardless of resistance.

What is HEPA filter full form?

HEPA is the abbreviation of High-Efficiency Particulate Air; you will also see it written as High-Efficiency Particulate Arrestance or High-Efficiency Particulate Absorbing. All three describe the same filter class: a pleated media filter rated at the most penetrating particle size of about 0.3 µm.

What is the micron size of a HEPA filter?

HEPA efficiency is defined at the most penetrating particle size, around 0.3 µm — the size at which a filter of this type is weakest, so passing at 0.3 µm means passing at both larger and smaller particles. Our product data declares removal for ≥0.5 µm and ≥0.3 µm particles across the H-grades, and for ≥0.1 µm on the U-grades; the grade letters, not a single micron figure, are what the standards are written against.

HEPA Filters

HEPA Filters range

350 Degree High Temperature Pleated Panel HEPA Filter

250 Degree High Temperature Pleated Panel HEPA Filter

V-Bank HEPA Filter

Liquid Tank HEPA Filter

Deep Pleated HEPA Filter

Mini-Pleated HEPA Filter

Selection table

How it compares

HEPA vs activated carbon

HEPA vs ULPA

MERV vs HEPA

Where it is used

Cleanrooms and semiconductor

Pharmaceutical and healthcare

Spray booths and coating lines

Data centers and commercial HVAC

FAQ

Further reading