What is Filtration?
Filtration (HEPA, sealed system)
How fine the exhaust filter is and whether air leaks around it.
Short answer
'HEPA filter' is meaningless without 'fully sealed system'.
Filtration when buying a vacuum cleaner
How fine the exhaust filter is and whether air leaks around it.
Why it matters: A vacuum without a sealed HEPA path throws the finest dust back into the room — worst for asthma.
Look for: 'HEPA filter' is meaningless without 'fully sealed system'.
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