Ozone measurement of Airofresh 1000 and BCU

Materials

A single unit each of Airofresh 1000 and Airofresh BCU were used. Ozone measurements were taken using a calibrated Aeroqual Series 500 ozone meter with an accuracy of +/- 0.01 ppm.

Methods

Ozone readings were taken in and around the Airofresh office building on Glen Osmond Rd, a highly-trafficked arterial route in Adelaide.

Ozone readings were measured as follows:

  • Airofresh 1000: the meter was held in the exhaust flow.
  • Building interior: an Airofresh 1000 unit was placed in a room of approximately 48 m3 and all doors and window closed. The unit was operated for a period of two hours before readings were taken.
  • Airofresh BCU: a large clear plastic bag was placed over the carbon filter on the BCU and taped to the body to create a chamber. A 5 cm hole was cut into the top of the bag to allow airflow. The meter was placed inside the bag on top of the BCU and left for 5 minutes for the atmosphere to equilibrate.
  • Building exterior: four readings were taken outside the building in different positions at an approximately similar distance from Glen Osmond Rd.

Results & Discussion

Table 1. Ozone measurement


Reading 1 2 3 4 Avg
Airofresh 1000 0.06 0.07 0.07 0.06 0.07
Building interior (ambient) 0.03 0.04 0.03 0.03 0.03
Unit Output 0.03 0.03 -0.04 -0.03 -0.03
Airofresh BCU 0.02 0.02 0.02 0.02 0.02
Building interior (ambient) 0.03 0.04 0.04 0.03 0.04
Unit Output -0.01 -0.02 -0.02 -0.01 -0.02