FH-8/8S Welding Fume Extractor — Washable PTFE Cartridge, Not HEPA

Hand-held fiber laser welding produces a lot of fine metal powder — exactly the kind of dust that clogs a standard HEPA filter in weeks. The Reborix FH-8/8S takes a different approach: washable PTFE membrane cartridges instead of disposable HEPA. Rinse them clean, run automatic pulse cleaning, and you replace the filters about once a year instead of every few months. Here's how that works.

Why Welding Fume Is Hard on Filters

Fiber laser welding — and hand-held welding in particular — vaporizes metal into an extremely fine powder. That dust is:

• Fine. A large share of it is sub-micron, small enough to slip past coarse filters.
• Abundant. A single welding station throws off a steady stream of it, shift after shift.
• Abrasive and sticky. Metal powder cakes onto filter media and blocks airflow fast.

A traditional HEPA filter catches this dust well — but it's disposable. Once the media loads up, you can't clean it. Water destroys the fiber matrix, and back-blowing a glass-fiber HEPA only recovers a fraction of the airflow. So the filter gets thrown away and replaced, over and over.

PTFE vs HEPA: The Washable Difference

The FH-8/8S uses PTFE (polytetrafluoroethylene) membrane cartridges instead of traditional HEPA media. The difference comes down to the material:

PTFE is hydrophobic — it repels water. That's why you can take the cartridge out, rinse the metal dust off with water, let it dry, and put it back in. You simply can't do that with a HEPA filter. Combined with the machine's automatic pulse back-blow, the cartridge stays breathing much longer.

How the FH-8/8S Filtration Works

Both models use a 3-stage filtration train, so no single filter does all the work:

1. Stainless steel pre-filter mesh — catches the large spatter and debris, protecting the cartridges.
2. 4× PTFE membrane cartridges — the main event, capturing 99.9% of particles down to 0.3μm.
3. Activated carbon — removes residual odors and the small amount of gaseous fume.

The pulse back-blow system automatically blasts the cartridges with reverse air during operation, knocking the dust cake into the collection tray. That automatic cleaning — plus the ability to wash the cartridge by hand — is what stretches the filter life to roughly a year.

The Replacement Cycle: ~1 Year

Here's the maintenance rhythm we recommend for the FH-8/8S:

• Daily/weekly: pulse back-blow runs automatically — no action needed.
• As needed: rinse the PTFE cartridges with water to restore full airflow after a heavy period.
• ~1 year: replace the cartridges, depending on usage frequency. Light-duty shops can go longer; continuous 24/7 production may replace sooner.

That's the difference from HEPA in practice: where a HEPA machine might see 2–4 filter changes a year, the FH-8/8S typically needs one. Over a year, cartridge replacement runs about $120–200 — and you're not paying a technician to swap disposable filters every quarter.

FH-8 vs FH-8S: Which One Do You Need?

Both run on the same PTFE cartridge platform. The FH-8S is the upgraded build — triple the airflow and programmable pulse cleaning for shops that run continuously or weld heavier material. If you're welding on one bench, the FH-8 is plenty; if you're running multiple stations or high-power fiber welding, step up to the FH-8S.

The Bottom Line

Welding fume clogs disposable HEPA filters fast. The FH-8/8S avoids that cost by using washable PTFE membrane cartridges you can rinse clean and reuse, backed by automatic pulse cleaning — so you replace filters about once a year instead of every few months. Same 99.9% particle capture at 0.3μm, a fraction of the filter bill.

Welding with a fiber laser or hand-held torch? See the full FH-8 Series here, or tell our engineers your setup and we'll recommend the right model and airflow.