Education Session Number 1:

Eben Cross Image cropped_edited.jpg

How low-cost air quality sensors are transforming how we understand & manage our indoor air

Eben Cross
QuantAQ - Somerville, MA

About this program:

The airborne nature of the pandemic has resulted in a significant increase in public awareness and engagement around the topic of indoor air quality.  Operational details previously reserved for HVAC specialists and facility operators are now considered critical need-to-know parameters to most building occupants. Topics of particle filtration and ventilation have gained prominence over the past ~20 months,and real-time tools that inform people about their everyday indoor air quality are now becoming accessible.  In this presentation, Eben will review a number of indoor air quality use-cases focusing on the application of low-cost air quality sensors that enable real-time, in-situ measurements of size-resolved aerosol particles and gas phase CO, CO2, NOx.  He will discuss how these tools can be used to empirically validate ventilation rates and filtration efficiencies on a room-by-room basis and lead to overall improvements of occupants' and facility managers' air intuition.

Attendees will:

1. Gain a deeper appreciation of the utility of low-cost in-situ, size-resolved aerosol measurements in indoor environments

2. Understand how to apply PM sensors in a practical manner to validate in-room ventilation rates and filtration efficiencies.

3. Understand the limits of consumer-grade PM sensors when applied to IAQ contexts.

4. Understand how to reconcile CO2-derived and aerosol-derived decay rates (i.e. air change rates).

5. Gain a better understanding of how outdoor air quality can impact indoor air quality under certain circumstances (woodsmoke, near-road transportation emissions, etc.)

About the Presenter:

Eben Cross has been working in the field of applied atmospheric chemistry & air pollution since 2003.  He completed his PhD in physical chemistry from Boston College in 2008 where he focused on instrument development, black carbon, and the climate and health impacts of combustion emissions. In 2010, he transitioned to MIT, joining Professor Jesse Kroll's group where he continued his emissions characterization & instrument development work.  Eben was introduced to low-cost air quality sensors in 2013-14, when he led the senior capstone course in the Civil and Environmental Engineering Dept. at MIT.  The end result of that effort was one of the first, real-time, online 22-node AQ sensor networks in the US.  Eben joined Aerodyne in 2015 to lead a R&D trajectory focused on the development of atmospherically rigorous low-cost AQ sensor systems.  In June of 2019, he co-founded QuantAQ where he and his team have continued to push the boundaries of what's possible when you combine low-cost sensors with a strong fundamental understanding of atmospheric chemistry, air pollution, and modern software engineering.

Presentation Level(s):



Content Area(s):

Residential and Commercial Buildings

Operations and Maintenance


Specific Pollutant Control (mold, radon, moisture, etc.)

Building Science

Occupant Health/Medical