Not all negative ion generators meet your application/usage requirements.
A clothing product may work even if it does not generate plenty of negative ions
because it touches your skin while you are wearing it.
However, a negative ion generator is a white elephant if it generates a small amount
only because the room cannot be filled with the ions.
You have to choose the product which meets your application requirements before you pay for it.
Otherwise, it will not produce the effects you expect.
Enquiry example
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I am interested in your negative ion generator #xxx. Will it help to alleviate symptoms of asthma?
Please let me know if you have an example where it worked for this application.
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