Indoor Air Quality (IAQ) has become a very important topic in today's world. When the London International Airport terminal was last renovated in 2003, Indoor Air Quality was much less of a concern than it is now.

Many of the pollutants generated at transportation facilities are particulate matter (PM) that is microscopic-much smaller than the thickness of an individual strand of human hair. The particulate is either swept indoors through ventilation systems or produced within the indoor space. The tiny particulate is inhaled or even sometimes swallowed. The most dangerous sources of indoor air pollution and odor are from the exhaust from aircraft and diesel engines, direct fuel emissions from refueling aircraft, along with larger dust particles from car exhaust, brakes, tires, asphalt, soil, etc. Given the toxic cocktail that is emitted into the air in and around airports, it is clear that air purification plays a critical role in maintaining safe and clean indoor air.

YXU On-Site Contractors worked with the team at Equipco Ltd to look to improve the indoor air quality in the building.

Indoor Air Quality testing was performed on November 2, 2021 in the 2nd Floor Maintenance office, corridor, and 5201 office on this floor. The testing was performed before installation of the Plasma Air 7300 unit and then again after installation. The Plasma Air 7300 model allows for installation on units up to 15 tons which fit this application given the size of the Rooftop unit dedicated to this space.

Testing was performed on site with Equipco Ltd. and London International Airport Maintenance Staff. The testing device used was an Alphalab Inc. Model AIC2-Air Ion Counter to determine the Ions per cubic centimeter in the indoor space. When monitoring ion count in an indoor air application, in simple terms, the more ions you can create in your space, the better the indoor air quality will be. The Plasma Air 7300 blasts millions of ions into the air stream and disperses them through-out the occupied space leveraging the buildings ductwork system. Once ions are in the occupied space they will cluster together with airborne particulates, allergens, mold spores, odors, and dust making them heavier so that they drop out of the breathable zone and larger in size so that they can easily be captured by filtration. Additionally, these ions will attach themselves to airborne pathogens like viruses and bacteria, rendering them inactive and no longer transmissible to a host. For this impact to be highly efficacious we target generating an ion count in the occupied space above 2500 ions/cm³.

FINAL RESULTS

• Target lons/Ccm3 in the space: 2500 lons/cm³ average
• Before Install Average: 150 ions/cm³
• 1 Hour After Install Average: 2,000 ions/cm³
• 7 Days After Install Average: 2,606 ions/cm³