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  QUESTION: Effectiveness and leaks from the housings of different brands of HEPA Vacuums, 01 Apr 2006, New York USA

Is there any new study information available which compares effectiveness and leaks from the housings of different brands of HEPA Vacuums?
ANSWER: 24 Aug 2006

Dear Taiyi,
many apologies for the long delay in answering your query and the lack of a clear answer. We asked nearly a thousand people who work on lead poisoning prevention your question and received no response so then went direct to known top-of-the-range HEPA vac manufacturers. A HEPA vac supply company in Canada thought Miele had done a recent study but when we asked for it from the US, Netherlands and Australian Miele offices, the most information we were told was that "We have tested out all our HEPA vacuum cleaners and tested them to know that they are compliant with the HEPA 12 standard and there's a rubber gasket around the gas chamber so the only way for dust to leave the machine is via the filter which we place after the motor not before the motor."
Nilfisk advised us similarly but the technical guy in the Sydney showroom will only be able to supply the study next week. If any studies are forthcoming, we'll forward them to you. Perhaps after all this time has passed, you have found the answer elsewhere? It would be great if you would let me know.
Yours Sincerely
Elizabeth O'Brien, Manager
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Last Updated 01 September 2012
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