I just finished watching one of the Sharper Image air cleaner ads on TV.
I just thought I would share a few observations.
The claim cleaner, fresher smelling air.
True? Sure it is true.
The air will be cleaner even if they remove only 0.00015% of the
pollution in the air. How much cleaner is not stated. They do not even
claim that is will be significantly cleaner. Independent test I have seen
indicate that it has far too little capacity to make a dent in a normal size
Fresher smelling it will be. We all tend to associate that "after the
thunder storm" smell with a fresh clean smell. What they don't say is that
truly clean air has no smell. What we are smelling is the Oģ (Ozone) just
as after a thunder storm.
Now get this. The next thing they talk about is their new catalytic
action filter that reduces Ozone (and smog) Ozone is harmful to humans and
nearly all life. The part they don't bother talking about is that Oģ is
coming from their own air cleaner! That's right they are telling us they
are "reducing" the contamination with their new device. OK tell me why I
should be happy that I can buy an air cleaner that will produce less
pollution in my home than the same air cleaner the sold last year? Why do I
want an air cleaner that pollutes the air in my home??? Why don't they tell
me how much it lets through??
As PT said .... one is born every minute and Sharper Image is living off
I've always felt these were way over priced. I might try one at $60 but not
at the outragous price they charge. HEPA filters with fans I think do the
best job but with the obvious downside of noise and replacement filters.
I friend got one of the SI cleaners to help with mold contamination and it
didn't help even a little (she ended up in the hospital with pneumonia)
Keeping good filters in the A/C or heating ducts is also very effective
The UV light is not a filter.
UV lights kill living things. If your problem is caused by things like
dust mites or mold that might be in the ducts, it may do some good. However
it will not do anything to eliminate dust or allergens that are already
there or drawn into the system or are created in other parts of the system.
It all depends on what your problem is.
Sales folk like Sharper Image like to make you thing that they have the
cure for every evil know to man.
I know nothing about the "ozone" controversy.
I feel that many folks believe that air is a mixture of gasses with a
known composition but this is not true. Air is that stuff we breath. Air
contains gas, dirt, pet dander, pollen, virii, bacteria, et c. The
composition of air varies depending on many factors. You can have air where
most of the particles of a certain size have been removed. But this does not
make the air purer. There isn't pure air. This purity thing is a marketing
To the contrary, the mixture of gases in air is pretty well fixed. What
else is suspended in the air isn't air, they are various contaiminants.
That they are present in various amounts and in various concentrations
is certainly indubitable. That no filtering system is perfect is also
true. But to say removing contaminants doesn't improve air purity isn't
Are you starting with a definition of air and then insisting that
everything else are contaminants? Air is a mixture of all sorts of stuff.
The composition of air varies. You can strain out particles but I don't see
that you 've made the air purer, you've just changed the mix.
According to www.dictionary.com:
1. A colorless, odorless, tasteless, gaseous mixture, mainly nitrogen
(approximately 78 percent) and oxygen (approximately 21 percent) with
lesser amounts of argon, carbon dioxide, hydrogen, neon, helium, and
2. This mixture with varying amounts of moisture and particulate
matter, enveloping the earth; the atmosphere.
So it does appear that, from definition 2, David M is correct. However,
according to definition 1, Duane is correct.
So you are both correct! Peace!
SI sued CR and CR won based on the real data found. CR determined that the
SI unit did almost ZERO to filter the air. They also found that it actually
CREATED ozone and possibly so much so that it could become unhealthy in your
house after a period of time. This may explain why SI decided to add that
little extra "feature" claiming to remove ozone.
What a joke!
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