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Ozone emissions spur calls for
survey
08:22 AM PST on Friday, March 3, 2006
by DAVID DANELSKI / The Press-Enterprise
California's air-quality regulators want to know how
many people rely on air purifiers that actually pollute
the indoor atmosphere with potentially harmful ozone.
The state Air Resources Board has commissioned UC
Berkeley researchers to survey 1,800 households and
estimate how many have the ozone-producing machines and
how often they're used.
The goal is to determine how big a health risk consumers
face from the machines' indoor air pollution.
The air purifiers still are aggressively marketed in
Southern California, more than a year after the air
board issued a public warning and asked the state
attorney general's office to investigate for potential
consumer fraud.
Not all the machines are harmful. However, additional
research affirmed earlier studies that found some
machines not only fail to effectively clean the air, but
they produce harmful ozone gas that can worsen asthma,
deaden the sense of smell and damage the lungs.
"We don't have second- or third-stage smog alerts
anymore, but now you make one in your home," said Jerry
Martin, an air board spokesman.
Martin said the agency doesn't have the authority to ban
or otherwise crack down on the machines.
Representatives of one manufacturer said the air
purifiers are safe and effective. The machines emit
ozone but not enough to be harmful, they say.
Riverside Mayor Ron Loveridge, a member of the air
board's governing body, said he thinks that enough
research has been done to support the creation of state
laws to regulate the machines.
UC Berkeley's telephone survey will ask residents
whether they use an air purifier, which model they use,
why they use one and how often. The researchers also
will try to determine what else the state can do to
evaluate the potential health risks from the machines.
Results of the $100,000 survey are expected late this
year.
A Researcher's Findings
Air-pollution officials have battled outdoor ozone, a
byproduct of vehicle and factory emissions, for decades.
Ozone is an invisible gas that can inflame the lungs and
bodily tissues. It causes headaches, nausea and runny
noses and can aggravate conditions like asthma enough to
send people to hospitals.
No one should be making the stuff in their homes, state
officials said last year.
But tests continue to find that many air purifiers now
on the market do just that.
Some of the most recent tests were done by Jerry Siegel,
an engineering professor at the University of Texas at
Austin, who presented his results at an indoor-air
conference in Beijing, China, in September.
Siegel went into his research believing that many of the
machines might not be effective air cleaners but
probably weren't harmful, he said in a telephone
interview. After testing 10 models, he found that some
emitted seriously harmful levels of ozone.
"They should never be used in an occupied building," he
said.
Machines that used ion-exchange technologies emitted
much less ozone but enough to raise health concerns, he
said.
Only machines with high-efficiency particle filters,
known as HEPA filters, emitted no ozone and resulted in
significantly cleaner air, Siegel said.
Machines that deliberately produced ozone or relied on
particle-ionizing technologies were ineffective air
cleaners, he said. Such machines removed only a
negligible amount of smoke from burning incense in a
laboratory air chamber, he said.
"They are emitting a dangerous gas and not removing many
particles from the air," Siegel said.
Tom Dresslar, a spokesman for the state attorney
general's office, said the agency is conducting a review
to look for possible violations of laws that protect
buyers from unfair business practices and false
advertising. The office hasn't initiated a full-scale
investigation, he said.
Endorsed by Dr. Laura
In its warning last year, the air board listed several
ozone-generating machines to avoid, including the Living
Air and Fresh Air models made by Greeneville,
Tenn.-based EcoQuest International.
Radio talk-show personality Dr. Laura Schlessinger
endorsed the Fresh Air model last month during her
call-in advice show on KFI radio, saying she has one of
the machines in her office.
Company representatives defend the air purifiers.
A paid science adviser said by telephone that recent
models use new technology and generate less ozone than
older models. None of the machines, however, emits
enough ozone to be harmful, said James L. Marsden, a
food-science professor at Kansas State University.
"Even with the older machines, the levels are very low,"
Marsden said. "No one is selling products with dangerous
levels of ozone."
Mary Cox, 82, of Temecula, said she was hooked by a
Fresh Air sales pitch when Schlessinger endorsed the
machine on the radio.
She got a free trial from Santa Barbara-based dealer
Michelle Giddens. Cox hoped the machine would give her
relief from her allergies.
Cox said the machine fogged up her home.
"It had this smell to it, and it wasn't doing anything
for me," said Cox, a retired Navy officer.
When she tried to return it, Giddens wouldn't take the
delivery, Cox said.
Giddens said Cox gave her a bad credit-card number and
never intended to pay the $800. She took Cox to
small-claims court and got a $400 judgment and the
machine back.
Giddens acknowledged that the Fresh Air model emits
ozone. "If you get the ozone at the right levels, it's
perfectly safe," she said.
Siegel, the indoor-air expert, strongly disagrees.
Ozone is a harmful gas, period, he said. "There is no
debate about ozone."
See this link:
http://www.chippynews.com/letters_about_ozone.htm
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Ozone
Generators Sold as Air Purifiers
The following is a
partial list of portable ozone generators
that are sold as air purifiers, primarily
for residential use. Inclusion on this list
is based on information available at the
time of review. Exclusion from this list is
not to be construed as endorsement by the
California Air Resources Board.
Ozone
generators intended for commercial use, and
in-duct systems or other non-portable
devices, are not listed here but may
generate potentially harmful levels of
ozone.
Air-Zone (All
models): XT-120, XT-240, XT-400, XT-800
Alpine (Certain
models): Living Air Classic, XL-15, Living
Air BreezeAT, LA1, LA2, Peak, Flair
Applied Ozone
Systems (Most models): CS-1, CS-2
APSNA (All
models): FA1, C3, BAT, F2
Aqua Sun Ozone
International (Certain models): 202A,
217A, 308, 206-A, Kleenair 2500R
Biozone (All
models): 50, 102, 500, 1000, 2000, 3000,
4000, 5000
Cliff Scott
Enterprises (CSE) (All models): CSE 100,
CSE 101
Crystal Air
(All models): Pro (420, 700, 3400-1),
Multizone 280
Csonka (All
models): Original Air Care, Super Air Care,
Pro Air Care
Ecoquest (Most
models): Fresh Air, Living Air Classic,
Breeze AT, Flaire
Enaly (Most
models): OZX-A200B, OZX-A500B
Jenesco (All
models): DC-12, PT101, PT101W, PT109, PT109W
Lenntech (All
models): Series 3000
Nature's Air
(Only model): NA-2
Odatus (All
models): II
Ozone Solutions
(All models): MZ-280, OMZ-420, OMZ-700,
OMZ-1000
Prozone (All
models): The Prozone, PZ6-AIR, Whole House
Twister, Whole House Air & Surface Purifier
Pure 'n Natural
(Certain models): OZ-2000 ('Odor Zapper'),
Sani-Mate AS-250-B
RainbowAir (All
models): Newaire Plug In, Activator (250,
500, 1000)
SpringAir
(Certain models): CS-1, CS-2
SurroundAir
(Certain models): Multi-Tech
Taoture
International Enterprises, Inc. (Most
models): OZX-A200B, OZX-A500B
Windchaser
(Certain models): IF-1, IF-2, IMC-1
Source: California Air
Resources Board Web site |