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Contex Industrial Environmental Hygiene Ltd. Montreal, Quebec
In October 1996, an independent study on "Comparative Evaluation of Air Quality
using the SANUVOX Next Generation Natural Air Purifier™" to assess the
efficiency of the device in air treatment was performed by Contex Industrial &
Environmental Hygiene Ltd. Montreal, Quebec. (Excerpts from this study are
presented below).
The calibration of equipment and the analytical procedures were performed in
compliance with the methods generally accepted in Industrial Hygiene.
1. The temperatures
and relative humidity were assessed with an Environmental Tectonics Corporation
psychrometer.
2. The concentrations of carbon dioxide (CO2) were measured with a Riken Model
RI-411 infrared spectrophotometer.
3. A Biotest Model RCS centrifuge air sampler was used to access the
concentrations of micro organisms in the air. The flow rate was 40 litres per
minute, the rotation speed was 4096 rpm and the overall accuracy of the flow
rate was +- 2%. The culture media consisted of a solution of Agar GK-A.
4. Dräger reactive tubes Model 6733081 were used for the detection of
formaldehyde. The lower limit of detection was 0.04 ppm.
5. Dräger reactive tubes Model 25601 were used for the detection of carbon
monoxide. The lower limit of detection was 0.5 ppm.
6. Dräger reactive tubes Model 6733181 were used for the detection of ozone gas.
The lower limit of detection was 0.005 ppm.
7. An SKC sampling pump was used with the reactive tubes.
All residences had a forced air heating system, and two were also equipped with
an air exchanger. Three residences were equipped with an electronic filter, one
had an electrostatic filter and one had a high efficiency cartridge filter.
RESULTS
OZONE:
No trace of Ozone was detected in any of the
residences studied before and during the operation of the SANUVOX Next
Generation Natural Air Purifier™.
FORMALDEHYDE:
No trace of Formaldehyde was detected in any of the residences studied before
and during the operation of the SANUVOX Next Generation Natural Air Purifier™.
CARBON
MONOXIDE: Before and
during the operation of the SANUVOX Next Generation Natural Air Purifier™ the
Carbon Monoxide concentrations were generally lower than 0.5 ppm.
CONCENTRATIONS OF MICROORGANISMS IN AIR
"WE OBSERVED A SIGNIFICANT DIFFERENCE IN THE
CONCENTRATIONS OF COLONY FORMING UNITS FOR THE SAMPLES TAKEN WITH AND WITHOUT
THE OPERATION OF THE SANUVOX Next Generation Natural Air Purifier." "BASED ON
OUR OBSERVATIONS, WE THEREFORE CONSIDER THAT THE SANUVOX Next Generation Natural
Air Purifier™ HAD A POSITIVE EFFECT ON THE QUALITY OF AIR."
(Contex
Industrial Environmental Hygiene Ltd. Montreal, Quebec. October 1996)
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