Jeffrey Siegel


Jeffrey Siegel, Ph.D., is Professor of Civil Engineering at the University of Toronto and a member of the university’s Building Engineering Research Group. He holds joint appointments at the Dalla Lana School of Public Health and the Department of Physical & Environmental Sciences.  He holds an M.S. and Ph.D. in Mechanical Engineering from the University of California, Berkeley as well as a B.Sc. from Swarthmore College.  He is fellow of ASHRAE and a member of the Academy of Fellows of ISIAQ.  His research interests including healthy and sustainable buildings, ventilation and indoor air quality in residential and commercial buildings, control of indoor particulate matter, the indoor microbiome, and moisture interactions with indoor chemistry and biology.  Dr. Siegel is an active member of ISIAQ and ASHRAE and is an associate editor for the journal Building and Environment.  He teaches courses in indoor air quality, sustainable buildings, and sustainable energy systems. Prior to his position at the University of Toronto, Dr. Siegel was an Associate Professor at the University of Texas.

Research Interests

Indoor air quality


Air cleaning


Building science

Research Themes (click for specific projects)




Raheleh Givehchi



Donna Vakalis

Ph.D. Student


Alireza Mahdavi

Ph.D. Student


Yuchao Wan

Ph.D. Student


Masih Alavy (and Justin)

Ph.D. Student


Amy Li

Ph.D. Student


Ernesto Diaz Lozano Patiño

MASc Student


Claire Lepine

RA & MPH 2017



Phil Fan

MASc 2017


Shaimaa Seyam

MASc 2017


Daniel Haaland

MASc 2016


Sandra Dedesko

MASc 2015


Marianne Touchie

PDF 2015


Mahnaz Zare

MASc 2014


Jeffrey Siegel Journal Publications (Conference Publications coming soon)
Bakker A, Siegel JA, Mendell MJ, Peccia J. Building and environmental factors that influence bacterial and fungal loading on air conditioning cooling coils. Accepted to Indoor Air.
Diaz Lozano Patino E, Siegel JA. 2018. Indoor environmental quality in social housing: A literature review. Building and Environment, 131, 231–241. Summary
Maestre JP, Jennings W, Wylie G, Horner S, Siegel JA, Kinney K. 2018. Filter Forensics: Microbiome Recovery from Residential HVAC Filters. Microbiome, 6(22), 1-14
Lax et al. (21 authors). 2017. Bacterial colonization and succession in a newly opened hospital. Science Translational Medicine , 9 (391),1-11, DOI: 10.1126/scitranslmed.aah6500.
Haaland, D, Siegel, JA 2017. Quantitative Filter Forensics for Indoor Particle Sampling. Indoor Air, 27(2), 364–376.
Adams R, Bhangar B, Dannemiller K, Eisen J, Fierer N, Gilbert J, Green J, Marr L, Miller S, Siegel JA, Stephens B, Waring M, Bibby K. 2016. Ten questions concerning the microbiomes of buildings. Building and Environment, 109, Pages 224–234.
Chase J, Fouquier J, Zare M, Sonderegger D, Knight R, Kelley S, Siegel JA, Caporaso, JG. 2016. Geography and location are the primary drivers of office microbiome composition. mSystems, 1(2) DOI: 10.1128/mSystems.00022-16 .
Zaatari, M, Novoselac, A, Siegel, JA 2016. Impact of ventilation and filtration strategies on energy consumption and exposures in retail stores. Building and Environment, 100, 186-196.
Siegel, JA 2016 Keynote: Primary and Secondary Consequences of Indoor Air Cleaners. Indoor Air, 26, 88–96.
Dedesko S, Siegel JA 2015. Moisture parameters and fungal communities associated with gypsum drywall in buildings. Microbiome, 3:71. DOI 10.1186/s40168-015-0137-ys.
Aldred J, Darling E, Morrison GC, Siegel JA, Corsi RL 2016. Analysis of the Cost Effectiveness of Combined Particle and Activated Carbon Filters for Indoor Ozone Removal in Buildings (ASHRAE RP-1491). Science and Technology for the Built Environment , 22(2) , 227-236.
Hoisington A, Maestre, J.P, Kinney K.A, Siegel JA 2016. Characterizing the Bacterial Communities in Retail Stores in the United States. Indoor Air, 26(6), 857–868.
Khurshid, S. Siegel, JA, Kinney K.A. 2016. Particulate Reactive Oxygen Species on Total Suspended Particles – Measurements in Residences in Austin, Texas. Indoor Air, 26, 953-963.
Aldred J, Darling E, Morrison GC, Siegel JA, Corsi RL Benefit-cost analysis of commercially available activated carbon filters for indoor ozone removal in single-family homes. Indoor Air.
Dedesko S, Stephens B, Gilbert JA, Siegel JA 2015. Methods to Assess Human Occupancy and Occupant Activity in Hospital Patient Rooms. Building and Environment, 90, 136-145.
Gall, E.T, Siegel, JA, Corsi, RL 2015. Modeling ozone removal to indoor materials, including the effects of porosity, pore diameter, and thickness. Environmental Science and Technology, 49, 4398−4406.
Ramos T, Dedesko S, Siegel JA, Gilbert JA, Stephens, B. 2015. Spatial and temporal variations in indoor environmental conditions, human occupancy, and operational characteristics in a new hospital environment. PLoS ONE. 10 (3): e0118207. doi:10.1371/ journal.pone.0118207 .
Xu Y, Liang, Y, Urquidi J, Siegel, JA 2015. Semi-volatile Organic Compounds in HVAC Filter Dust in Retail Stores. Indoor Air, 25, 79-92.
Nirlo, E, Crain, N, Corsi, R.L, Siegel, JA 2015. Field evaluation of five VOC measurement techniques: Implications for green building decision making. Science and Technology for the Built Environment , 21 , 67–79.
Khurshid, S. Siegel, JA, Kinney K.A. 2014. Technical Note: Particulate reactive oxygen species concentrations and their association with environmental conditions in an urban, subtropical climate. Atmospheric Chemistry and Physics , 14 , 6777-6784.
Hoisington, A, Maestre, J.P, Siegel, JA, Kinney, K.A. 2014. Impact of Sampler Selection on the Characterization of the Indoor Microbiome via High-Throughput Sequencing, Building and Environment, 80, 274-282.
Khurshid, S. Siegel, JA, Kinney K.A. 2014. Indoor Particulate Reactive Oxygen Species Concentrations. Environmental Research , 132, 46-53.
Gall, E.T, Corsi, R.L, Siegel, JA 2014. Impact of Physical Properties on Ozone Removal to Several Porous Materials. Environmental Science and Technology, 48(7), 3682–3690.
Xu Y, Liang, Y, Urquidi J, Siegel, JA 2014. Phthalates and Polybrominated Diphenyl Ethers in Retail Stores. Atmospheric Environment, 87, 53–64.
Nirlo, E, Crain, N, Corsi, R.L, Siegel, JA 2014. Volatile organic compounds in fourteen U.S. retail stores. Indoor Air, 24, 484–494.
Zaatari, M, Novoselac, A, Siegel, JA 2014. The Relationship between Filter Pressure Drop, Indoor Air Quality, and Energy Consumption in Rooftop HVAC Units. Building and Environment, 73, 151-161.
Zaatari, M, Siegel, JA 2014. Particle Characterization in Retail Environments: Concentrations, Sources, and Removal Mechanisms. Indoor Air, 24, 350-361.
Zaatari, M, Nirlo, E, Jareemit, D, Crain, N, Srebric, J, Siegel, JA 2014. Ventilation and Indoor Air Quality in Retail Stores: A Critical Review (RP 1596). HVAC&R Research, 20, 276-294.
Hoisington, A, Maestre, J.P, Siegel, JA, Kinney, K.A. 2014. Exploring the Microbiome of the Built Environment: A Primer on Four Biological Methods Available to Building Professionals. HVAC&R Research, 20, 1-9.
Taylor Lange, S, Juenger, M. GC, Siegel, JA 2014. Radon Emanation Fractions from Concretes Containing Fly Ash and Metakaolin. Science of the Total Environment, 46 , 1060-1065.
Shogan, B, Smith, D, Packman, A, Kelley, S, Landon, E, Bhangar, S, Vora, G, Jones, R, Keegan, K, Stephens, B, Ramos, T, Kirkup, B, Levin, H, Rosenthal, M, Foxman, B, Chang, E, Siegel, J, Cobey, S, An, G, Alverdy, J, Olsiewski, P, Martin, M, Marrs, R, Hernandez, M, Christley, S, Morowitz, M, & Weber, S. 2013. The Hospital Microbiome Project: Meeting Report for the 2nd Hospital Microbiome Project, Chicago, USA, January 15th, 2013. Standards In Genomic Sciences, 8(3). doi:10.4056/sigs.4187859
Gall, E, Darling E, Siegel, JA, Morrison GC, Corsi, RL 2013. Evaluation of several green building materials for ozone removal, primary and secondary emissions. Atmospheric Environment. 77, 910-918.
Waring, M. Siegel, JA 2013. Secondary Organic Aerosol Formation from Reactions between Ozone and Surface-Sorbed d-Limonene. Environmental Science and Technology, 47(12), 6341–6348
Stephens, B.R, Siegel JA 2013. Ultrafine particle removal by residential HVAC filters. Indoor Air, 23, 488–497.
Boor, B, Siegel, JA, Novoselac, A. 2013. Wind Tunnel Study on Aerodynamic Particle Resuspension from Monolayer and Multilayer Deposits on Indoor Surfaces. Aerosol Science and Technology, 47(8), 848-857.
Boor, B, Siegel, JA, Novoselac, A. 2013. Monolayer and Multilayer Particle Deposits on Hard Surfaces: Literature Review and Implications for Particle Resuspension in the Indoor Environment. Aerosol Science and Technology, 47(8), 831-847.
Taylor Lange, S, Juenger, M. GC, Siegel, JA 2013. Engineering Cement Renders to Improve Air Quality. Atmospheric Environment, 70, 263-266.
Smith, D, Alverdy, J, Gilbert, J, Coleman, M, Garcia-Houchins, S, Green, J, Keegan, K, Kelley, S, Kirkup, B, Kociolek, L, Levin, H, Landon, E, Olsiewski, P, Knight, R, Siegel, J, Weber, S, Gilbert, JA, 2013. The Hospital Microbiome Project: Meeting Report for the 1st Hospital Microbiome Project Workshop on sampling design and building science measurements, Chicago, USA, June 7th-8th 2012. Standards In Genomic Sciences. 8(1), doi:10.4056/sigs.3717348.
Stephens, B.R, Siegel JA 2012. Penetration of ambient submicron particles into single-family residences: associations with building characteristics. Indoor Air, 22(4), 501–513.
Taylor Lange, S, Stewart, J, Juenger, M. GC, Siegel, JA 2012. The contribution of fly ash toward indoor radon pollution from concrete. Building and Environment, 56, 276-282.
Cros, C, Morrison, GC, Siegel, JA, Corsi, RL 2012. Long-term performance of passive materials for removal of ozone from indoor air. Indoor Air, 22(1), 45-53.
Stephens, B.R, Gall, E.T, Siegel JA 2012. Measuring the penetration of ambient ozone into residential buildings. Environmental Science and Technology, 46(2), 929–936.
Stephens, B.R, Siegel JA 2012. Comparison of Test Methods for Determining Particle Removal Efficiency of Filters in Residential and Light-commercial Central HVAC Systems. Aerosol Science and Technology, 46(5), 504-513.
Stephens, B, Novoselac, A, Siegel JA 2011. Operation characteristics of residential and light-commercial air-conditioning systems in a hot and humid climate zone. Building and Environment, 46(10), 1972-1983.
Hun D.E, Corsi R. L, Morandi M.T, Siegel JA 2011. Automobile proximity and Indoor Residential Concentrations of BTEX and MTBE. Building and Environment, 46, 45-53.
Waring, M.S, Wells, J.R, Siegel, JA 2011. Secondary Organic Aerosol Formation from Ozone Reactions with Single Terpenoids and Terpenoid Mixtures. Atmospheric Environment, 45(25), 4235-4242
Waring, M.S, Siegel, JA 2011. Indoor air quality implications of using ion generators in residences. Indoor Air, 21(3), 267-276.
Gall, E.T, Corsi, R, Siegel, JA 2011. Barriers and Opportunities for Passive Removal of Indoor Ozone. Atmospheric Environment, 45(19), 3338-3341.
Noris, F, Siegel. JA, Kinney, K.A. 2011. Evaluation of HVAC filters as a sampling mechanism for indoor microbial communities. Atmospheric Environment, 45, 338-346.
Peschiera, G. Taylor, J.T, Siegel JA  2010.  Response-Relapse Patterns of Building Occupant Electricity Consumption Following Exposure to Personal, Contextualized and Occupant Peer Network Utilization Data.  Energy and Buildings, 42, 1329–1336.
Waring, M.S, Siegel, JA 2010. The Influence of HVAC Systems on Indoor Secondary Organic Aerosol Formation. ASHRAE Transactions, 116(1), 556-571.
Hun D.E, Corsi R. L, Morandi M.T, Siegel JA 2010. Formaldehyde in Residences:  Long-Term Indoor Concentrations and Influencing Factors. Indoor Air, 20(3), 196-203
Stephens, B, Novoselac, A, Siegel JA 2010. Energy Implications of Filters in Residential and Light-Commercial Buildings. ASHRAE Transactions, 116(1), 346-357.
Stephens, B, Novoselac, A, Siegel JA  2010. The Effects of Filtration on Pressure Drop and Energy Consumption in Residential HVAC Systems. HVAC&R Research, 16(3), 273-294.
Kunkel, D.A, Gall, E.T, Siegel, JA, Novoselac, A, Morrison, GC, Corsi, RL 2010. Passive Reduction of Human Exposure to Indoor Ozone. Building and Environment, 45(2), 445–452.
Hun D.E, Siegel JA, Morandi M.T, Stock, T.H, Corsi R. L. 2009. Cancer risk disparities between Hispanic and non-Hispanic White populations: The role of exposure to indoor air pollution. Environmental Health Perspectives , 117 (12), 1925-1931.
Noris, F, Siegel, JA, Kinney, K.A. 2009. Biological and Chemical Contaminants in HVAC Filter Dust. ASHRAE Transactions, 115(2), 484-491.
Mukai, C, Siegel, JA, Novoselac, A. 2009. Impact of Airflow Characteristics on Particle Resuspension from Indoor Surfaces. Aerosol Science and Technology, 43(10), 1022-1032
Novoselac, A, Siegel, JA 2009. Effective Positioning of Portable Air Cleaning Devices in Multizone Residential Buildings. Building and Environment, 44(12), 2348-2356.
Chojnowski, D.B. Nigro, P.J. Siegel, JA, Kosar. D.A. 2009 Laboratory Measurements to Quantify the Effect of Bypass on Filtration Efficiency. ASHRAE Transactions, 115(1), 191-198.
VerShaw, J.R, Siegel, JA, Chojnowski, D.B, Nigro, P.J. 2009. Implications of Filter Bypass. ASHRAE Transactions, 115(1), 199-207.
Rim, D, Siegel, JA, Spinhirine, J, Webb, A, McDonald-Buller, E. 2008. Characteristics of Cabin Air Quality in School Buses in Central Texas. Atmospheric Environment , 42, 6453-6464.
Waring, M, Siegel, JA, Corsi, R. 2008. Ultrafine particle removal and generation by portable air cleaners. Atmospheric Environment, 42, 5003-5014.
Waring, M, Siegel, J. A. 2008. Particle loading rates for HVAC filters, heat exchangers, and ducts. Indoor Air, 18, 209-224.
Corsi, R. L, Siegel, J. A, Chiang C. 2008. Particle resuspension during the use of vacuum cleaners on residential carpet. Journal of Occupational and Environmental Hygiene , 5 , 232-238.
Waring, M, Siegel, JA 2007. An evaluation of the indoor air quality in bars before and after a smoking ban in Austin, TX. Journal of Exposure Analysis and Environmental Epidemiology, 17, 260-268.
Zhao, P, Siegel J, Corsi, R. 2007. Ozone removal by HVAC filters. Atmospheric Environment, 41, 3151-3160.
Corsi, R, Siegel J, Karamalegos, A, Simon, H, Morrison, G. 2007. Personal Reactive Clouds: Introducing the concept of near head chemistry. Atmospheric Environment , 41, 3161-3165.
Francisco, P. Siegel, J, Palmiter, L. Davis, B. 2006. Measuring Residential Duct Efficiency with the Short-Term Coheat Test Methodology. Energy and Buildings, 38, 1076-1083.
Ward, M, Siegel, JA, Corsi, R. L. 2005. The effectiveness of stand alone air cleaners for shelter-in-place. Indoor Air, 15, 127-134.
Ward, M, Siegel, JA, 2005. Filter Bypass: Implications for Filter Efficiency.  ASHRAE Transactions. 111(2), 1091-1100.
Siegel, JA, Nazaroff, W.W. 2003. Predicting particle deposition on HVAC heat exchangers. Atmospheric Environment, 37, 5587-5596.
Siegel, J,  McWilliams, J, Walker, I.  2003.  Comparison Between Predicted Duct Effectiveness from Proposed ASHRAE Standard 152P and Measured Field Data for Residential Forced Air Cooling Systems.  ASHRAE Transactions, 109(1), 503-512.
Siegel, JA, Wray, C. P. 2002. An Evaluation of Refrigerant Charge Diagnostics For Commissioning Residential Cooling Systems. ASHRAE Transactions, 108(2), 965-975.


Course CodeTitle & DescriptionSessionDay(s)Start TimeEnd
Fall 2017Monday13:0016:00
CIV380HWinter 2018Scheduled by the Office of the Faculty Registrar.
Winter 2018Scheduled by the Office of the Faculty Registrar.

News Mentions

U of T CECA/NECA Competes in the 2018 Green Energy Challenge

Aiming to best their third place honours received last year, the University of Toronto student chapter of the Canadian/National Electrical Contractors Association (CECA/NECA) is competing in the 2018 ELECTRI International/NECA Green Energy Challenge. Leading up to the Green Energy Challenge, the team has hosted several events to spread awareness about sustainable buildings among U of… Read more »

Modular labs installed on U of T Engineering rooftop enable leading building science research

Two new facilities situated atop U of T Engineering’s Sandford Fleming Building will advance multidisciplinary building science research into how buildings consume and distribute energy and control indoor environments. The state-of-the-art Twin Suites Rooftop Lab will be home to research conducted by Professor Marianne Touchie, who is cross-appointed to the Department of Mechanical & Industrial Engineering and… Read more »

Professor Marianne Touchie (CivE, MIE) is working with Toronto Community Housing and The Atmospheric Fund to better understand how changes to energy use affect indoor environmental quality in multi-unit residential buildings. Toronto Public Health is collaborating to use their data to inform policy. (Photo: Kevin Soobrian)

Heat, housing and health: Marianne Touchie and the complexity of multi-unit residential buildings

Professor Marianne Touchie (CivE, MIE) is working with Toronto Community Housing and The Atmospheric Fund to better understand how changes to energy use affect indoor environmental quality in multi-unit residential buildings. Toronto Public Health is collaborating to use their data to inform policy. (Photo: Kevin Soobrian) This story originally appeared at U of T Engineering… Read more »


Jeffrey Siegel
Department of Civil & Mineral Engineering
University of Toronto
35 St. George St.
Toronto, Ontario
Canada, M5S 1A4


Office: GB314A

Tel: 416-978-7975
Fax: 416-978-6813