“HEPA-like” and “HEPA-type” are marketing terms, not standards. For construction dusts and welding fume, what matters is certified HEPA performance and a sealed system that prevents bypass.

Know the standard you’re buying

HEPA filters are classified under EN 1822. H13 and H14 are the classes relevant to high-efficiency capture; H14 is typically selected for fine or carcinogenic dusts. A label alone is not enough: look for certification and test data from the manufacturer, and remember that the whole extractor or air scrubber must be tight so leaks do not defeat the filter.

Common pitfalls with “HEPA-like” claims

• No certification. Claims of “99%” without EN 1822 class, test method, and leak test are not evidence.
• Poor sealing. A good filter in a leaky housing allows contaminated air to bypass the media.
• Wrong class for the task. M-class extractors are common for wood and general dust; H-class and H13/H14 are needed for respirable and high-hazard dusts.
• Maintenance ignored. Loaded or damaged filters reduce efficiency; gasket wear and incorrect fitting are frequent failure points.

Practical procurement checks

• Ask for EN 1822 classification (H13/H14) and factory test records. For critical applications, require proof of integrity testing.
• Inspect build quality: gaskets, latches, and tool cuffs. The seal is as important as the media.
• Match filter class to risk. For RCS, welding fume, or asbestos-related remediation, select H14 and ensure the system is designed for it.
• Plan for upkeep. Availability of prefilters, correct bags, and service support determines real-world performance.

Choose tested HEPA, not “HEPA-like”. Combine certified filtration with good seals and sensible maintenance to achieve reliable, compliant dust control.