H13 HEPA Filters
The Airtech H13 HEPA filter has one unbroken gasket around its face, so there is no joint for air to sneak past the media. It also starts at a low resistance, so your fan works less hard. Manufactured to EN1822 H13, and every unit ships with its own serial-numbered test certificate. Full-size and half-size in stock at our Silverton warehouse. We deliver, or you can collect. Call Nick with your housing dimensions and he will confirm availability same day.
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The Airtech H13 HEPA filter is a minipleat, high-airflow HEPA built for clean air supply and pre-final duty. Manufactured to EN1822 H13, it captures at least 99.95% of particles at the most penetrating particle size (MPPS). Each unit ships with its own serial-numbered EN1822 test certificate. Full-size and half-size are held in stock at our Silverton, Pretoria warehouse, and current pricing for each is on the order panel above.
The Continuous Seal: No Joint for Air to Bypass
A HEPA filter only works if all the air goes through the media. The weak point is usually the gasket, not the media: any gap in the seal is a path for air to go round the filter instead of through it.
The Airtech H13 has a continuous seal: one unbroken EPDM gasket around the whole face of the filter. There are no corner joints in the seal, so when the filter is clamped into its housing there is no joint for air to bypass. If a leak-free fit in the housing is your main concern, it is the reason to choose this filter.
A seal still depends on a sound housing and even clamping. Check that the housing knife-edge or sealing face is clean and undamaged when you change the filter.
H13 or H14?
Both grades are made to EN1822, and both ship with an individual serial-numbered test certificate. The difference is grade, seal and price.
- H14 is the higher grade: at least 99.995% at MPPS. Choose it for the most demanding zones, or wherever your specification or validation protocol names H14. See the H14 HEPA filter.
- H13 captures at least 99.95% at MPPS and has the continuous seal. It suits many cleanroom supply and pre-final duties at a lower price, and it protects a downstream terminal HEPA or ULPA filter from loading early.
The trade-off is plain: H13 lets through more of the hardest-to-catch particles than H14. Where the specification says H14, buy H14. For a fuller comparison, read H13 vs H14 HEPA grades.
How It Is Built
Galvanised steel frame, glass-fibre minipleat media held apart by hot-melt separators, and the continuous EPDM gasket. The minipleat construction packs a large media area into a 292 mm deep filter, which keeps resistance moderate at high airflow. HEPA filters are always installed downstream of pre-filtration: G4 panel filters first, then F9 pocket filters or F9 V-bank filters. Good pre-filtration is what stops the HEPA loading early.
Why Prebur for H13 HEPA Supply
Each Airtech HEPA filter, H13 and H14 alike, is serial-numbered and individually tested, and the certificate arrives with the filter. It goes straight into your validation file. Note: per-unit test certificates are supplied with HEPA grades (H13 and H14), not with G4, F9 or other non-HEPA filters.
Full-size (610×610×292mm) and half-size (305×610×292mm) are held at our Silverton warehouse. We deliver nationwide by courier, with the cost quoted for your address at checkout, or you can collect free.
Prebur has supplied air filters to South African facilities for 37 years. When you call, you speak to an owner, not a call centre.
Call Nick Els on +27 74 159 1634 or email [email protected]. Nick will confirm stock, quote, and help you choose between H13 and H14 for your application.
Specification: H13 HEPA Filter
| Filter Class | H13 (EN1822) |
| Efficiency (class definition) | H13: at least 99.95% at MPPS |
| Full Size | 610 × 610 × 292 mm (Model VH66-H13) |
| Half Size | 305 × 610 × 292 mm (Model VH36-H13) |
| Construction | Minipleat, high airflow |
| Media | Glass fibre |
| Separators | Hot-melt |
| Frame | Galvanised steel |
| Gasket | EPDM, continuous seal (no joints) |
| Rated Airflow (full / half) | 3 400 m³/h / 1 700 m³/h |
| Initial Resistance (full) | 212 Pa at 3 400 m³/h, measured on the current batch (catalogue 260 Pa ±10%) |
| Initial Resistance (half) | 280 Pa ±10% at 1 700 m³/h |
| Certificate | Serial-numbered EN1822 test certificate per unit |
Rated airflow and the half-size resistance are catalogue values. The full-size resistance was measured on the current production batch.
Measured on the Production Batch: 610×610×292mm (VH66-H13)
| Airflow (m³/h) | 1 700 | 2 550 | 3 400 | 4 250 |
|---|---|---|---|---|
| Resistance (Pa) | 89 | 147 | 212 | 288 |
Resistance test on the current production batch, performed in the manufacturer's test lab on 16 August 2026. At the rated 3 400 m³/h the filter measured 212 Pa, below the 260 Pa catalogue figure. This is a resistance test only: efficiency is covered by the individual EN1822 certificate that ships with each unit.
Available Sizes: Both H13 Grade, 292mm Deep
| Size (WxHxD) | Model | Init. Resistance | Rated Airflow |
|---|---|---|---|
| 610×610×292mm | VH66-H13 | 260Pa ±10% | 3 400 m³/h |
| 305×610×292mm | VH36-H13 | 280Pa ±10% | 1 700 m³/h |
All: galvanised steel frame, glass-fibre media, hot-melt separators, continuous EPDM gasket, H13 to EN1822. Individual test certificate included with each unit.
H13 HEPA filters clean the air in systems where fine particles matter but the specification does not call for H14. They are installed downstream of G4 panel pre-filters and F9 pocket or V-bank filters, which protect the HEPA from loading early.
Supply air to cleanrooms where the room classification is met with H13. Check the grade your specification or validation protocol names before ordering.
A pre-final stage upstream of the terminal HEPA or ULPA filters in a cleanroom. The H13 takes the particle load, so the more expensive final filters last longer between changes.
Pre-final filtration in pharmaceutical air handling units, ahead of the terminal stage. The individual test certificate supports your validation paperwork.
Pre-final and supply-air filtration in hospital ventilation, where the specification names H13 rather than H14.
High-efficiency filtration of process air in manufacturing, where fine particulate affects product quality.
Any HEPA duty where H13 meets the requirement. If your zone needs H14, see our H14 HEPA filter.
What does H13 mean on a HEPA filter?
H13 is a HEPA class under the EN1822 standard. To be classed H13, a filter must capture at least 99.95% of particles at the most penetrating particle size (MPPS), the particle size that is hardest for the media to stop. H14 is the next class up, at 99.995% or better at MPPS.
What is a continuous seal and why does it matter?
The gasket on the Airtech H13 is one unbroken ring of EPDM around the face of the filter. There is no corner joint or butt joint in the seal, so there is no gap where unfiltered air can slip past the media when the filter is clamped into its housing. A filter is only as good as its seal: if air bypasses the gasket, the media grade stops mattering.
H13 or H14: which one do I need?
Start with your specification or validation protocol. If it calls for H14, buy H14. H14 is the higher grade (99.995% at MPPS) and is specified for the most demanding zones. H13 with a continuous seal suits many cleanroom supply and pre-final duties at a lower price, and protects a downstream terminal HEPA or ULPA filter from loading early. If you are unsure, call Nick on +27 74 159 1634 with the room type and the housing size.
Does the H13 come with a test certificate?
Yes. Every Airtech HEPA unit, H13 and H14 alike, ships with its own serial-numbered EN1822 test certificate. The certificate covers that specific filter, not a batch sample, and it goes straight into your validation file.
What sizes are in stock?
Two sizes are held in stock in Silverton, Pretoria: full-size 610 × 610 × 292 mm (VH66-H13) and half-size 305 × 610 × 292 mm (VH36-H13). Other dimensions are available on request: send us the face size, depth and grade and we will confirm.
How is delivery charged?
We deliver nationwide by courier. The delivery cost is quoted live for your address at checkout, before you pay. You can also collect from our Silverton, Pretoria warehouse at no charge.
When should an H13 HEPA filter be replaced?
Replace on differential pressure, not on the calendar. Fit a gauge across the filter and change it when the reading reaches the final resistance set by your system designer or validation protocol. Good upstream pre-filtration (G4 panels and F9 pockets or V-banks) keeps the HEPA from loading early and extends its service life.