The Building Science Podcast

In this episode, Kristof sits down with sustainability expert Josh Jacobs to demystify the ins and outs of Life Cycle Assessments (LCAs), Environmental Product Declarations (EPDs), Product Category Rules (PCRs) and ISO Standards that are causing a decarbonization to happen around the world.
Translating the complex data of an LCA into a standardized format, EPDs function as 'nutrition labels' for building materials, helping designers and specifiers count the 'carbon calories' of everything from steel girders to heat pumps. Josh and Kristof explore the critical shift from focusing exclusively upon operational carbon to including embodied carbon in the carbon reduction conversation, break down the cradle-to-grave phases of building materials, and offer actionable insights on using better data to make truly sustainable design decisions.

Apologies that Kristof’s mic was clipping.

Josh Jacobs
Josh has helped numerous AHJs develop and implement sustainable purchasing policies and requirements, including but not limited to: the US General Service Administration, the US Military through the UFGS, the State of California, the city of New York, the Building Construction Authority of Singapore, and numerous universities and private businesses. Josh has also helped develop influential materials, human health, product emissions, and indoor air quality criteria in numerous global codes and rating systems, including but not limited to LEED v4 and v4.1, Fitwel, Green Globes, CALGreen, IgCC, ASHRAE 189.1, and BREEAM. He also works with organizations investor relations and sustainability teams to understand ESG financial reporting tools such as SASB, GRI, and TCF along with looking at their carbon footprint.

Links from the Episode
Organizations Mentioned:
MEP2040: An organization and steering committee focused on decarbonizing mechanical, electrical, and plumbing systems.
WAP Sustainability Consulting: A large life cycle assessment organization that helps manufacturers create EPDs.
SLR: A global environmental and advisory firm that owns WAP.
USGBC: The U.S. Green Building Council, associated with the LEED rating system.
ASHRAE: The American Society of Heating, Refrigerating and Air-Conditioning Engineers.
ISO: The International Organization for Standardization.
NSF: An organization with an EPD program (distinct from the National Science Foundation - originally focused on water certification).
UL: Underwriters Laboratories, an early EPD program operator in North America.
ICC-ES: The International Code Council Evaluation Service, an EPD program operator.
ASTM: An organization that features an EPD program.
ANSI: The American National Standards Institute.
CIBSE: The Chartered Institution of Building Services Engineers based in the UK.
NAHB: The National Association of Home Builders.
Standards and Financial Tools
ISO 14040 / ISO 14044: International standards that provide the framework and guidelines for conducting LCAs.
ISO 14025: The standard that governs how program operators run EPD programs and dictates what should be included in an EPD.
ISO 21930: The overarching Product Category Rule (PCR) for building materials typically used in the Americas.
EN 15804: The European equivalent to ISO 21930.
ISO 20400: The standard for Sustainable Procurement.
ASHRAE 189.1: A standard for the design of high-performance green buildings.
IgCC: The International Green Construction Code.
CIBSE TM65 / North American CIBSE/ASHRAE TM65: A standard that approximates an LCA to provide directionally accurate information when a full EPD is not available.
SASB, GRI, TCFD: Sustainable financial reporting tools used by organizations and investor relations teams.

Team
Hosted by Kristof Irwin
Edited by Nico Mignardi
Produced by M. Walker

An interview with Robert Bean and Lance MacNevin
In this episode we unpack the rapidly transforming world of hydronic heating and cooling. We are joined by two seasoned veterans of the industry, Robert Bean and Lance MacNevin. With many decades of real-world experience and hard-earned perspective between them, they offer a thoughtful and engaging look into why hydronics is at the forefront of modern, highly efficient building practices. Robert is (attempting to be) a retired engineering technology professional and ASHRAE Fellow, while Lance brings his extensive background serving as the Director of Engineering at the Plastics Pipe Institute.
This episode is packed with sound-bite worthy moments as our guests cut through the noise to discuss the realities of hydronic-based thermal comfort. Whether you are a homeowner, architect, or builder, you will find their independent, expert perspectives well worth listening to and holding on to. This is definitely an episode you will want to bookmark and share with anyone interested in the future of the HVAC industry!

Robert Bean
Robert Bean is a retired engineering technology professional who specialized in the design of indoor environments and high-performance building systems. Mr. Bean is an ASHRAE Fellow and ASHRAE Distinguished Lecturer, recipient of the Lou Flagg Award, Distinguished Service Award, and instructor for the ASHRAE Learning Institute. He has authored many papers, articles, and course curricula, and has served on numerous technical committees related to indoor environmental quality, building, and energy systems.

Lance MacNevin
Lance MacNevin, P.Eng. is the senior director of engineering for the Plastics Pipe Institute’s Building & Construction Division, with expertise on pressure pipes such as CPVC, HDPE, PEX, PE-RT, and PP. Lance has been in the plastic pipe industry since 1993, working as an R&D engineer, codes and standards specialist, and trainer for a major piping manufacturer for over twenty years before joining PPI in 2015. In this role, he focuses on plumbing and mechanical systems, coordinating research, education, and advocacy activities. He is an active member of ASHRAE, ASPE, ASTM, AWWA, CSA, IAPMO, ICC, IGSHPA, NSF, and RPA.

Team
Hosted by Kristof Irwin
Edited by Nico Mignardi
Produced by M. Walker

An interview with Dr. Eva King
Our homes are indoor environments of our own making. These environments exist to make our lives better but often unintentionally expose us to contaminants—chemical and microbial—that harm our health and wellbeing. For genetically susceptible individuals, these routine exposures can trigger a breakdown in the body's natural tolerance, leading to chronic inflammatory and neurological symptoms such as CIRS, TILT, and PANS/PANDAS. In a sadly apt metaphor, we are the canaries and our home is the coal mine.
Today, we are joined by a frontline expert in this field, Dr. Eva King. Eva holds a Masters in Biochemistry and a Doctorate in Immunology/Epidemiology from the University of Oxford. She has dedicated more than two decades investigating the intersection of indoor environments and human health. Her focus is helping clients with underlying medical conditions identify and address building-related issues that contribute to their health problems. This interview is fuel for the journey to flip our indoor environments from being a major contributor to chronic disease to becoming a primary solution. This is a central and sobering topic for all of us with agency in the AEC. Please listen and share.

Eva King
Dr. Eva King, principal and founder of AURA EnviroScience, has been involved in investigations and research into indoor environments and health, allergens, asthma and immunology for about 20 years. Her work has been published in many peer-reviewed scientific publications, and she regularly presents at conferences and workshops.
Her focus is helping clients with underlying medical conditions identify building-related problems that contribute to their health issues, often by direct physician referral.
Dr. King received her Master in Biochemistry in her native Germany, and her Doctorate in Immunology/Epidemiology from the University of Oxford, UK, and is a Council-certified Indoor Environmental Consultant (CIEC, ACAC #180311).
She is a member of ASHRAE, the American Industrial Hygiene Association (AIHA), American Conference of Governmental Industrial Hygienists (ACGIH), and the International Society of Indoor Air Quality and Climate (ISIAQ), and previously served on the Board of Directors and as Technical Conference Chair of the Indoor Air Quality Association.

Team
Hosted by Kristof Irwin
Edited by Nico Mignardi
Produced by M. Walker

The Humid Climate Conference (HCC) is officially back in Austin this May 4th & 5th, and we have a fantastic line up of speakers and topics for our 10th anniversary. It’s time to step away from the Zoom screen and have some live 3D human interaction!
Today’s episode is a public service announcement to join us in Austin to recharge our collective motivation and determination. We often talk about the system lens of building science, but we tend to forget that we ourselves are part of a larger system. This conference is an energy boost that charges us up with understanding, perspective and enthusiasm that only get generated when we’re in the same room.
This year, The Humid Climate Conferences dives into the intersection of Risks, Realities, and Rewards and how they guide and motivate appropriate design and construction in humid climates.
Whether you're here for the Phius passive house technical deep dives, to reconnect with friends and colleagues at the famous after party happy hours, or just to soak up some Austin energy, this is one event you simply cannot miss. Check the link in the show notes to learn more and secure your spot.

Team
Hosted by Kristof Irwin
Edited by Nico Mignardi
Produced by M. Walker

An interview with Dr. Sarah Haines
The Indoor Microbiome is the complex, invisible world of trillions of microorganisms living within indoor environments. Its residents include bacteria, archaea, fungi and viruses. We live immersed in this ecological niche, for good or ill. A typical home can host between 500 and 1000 different species of bacteria in household dust alone, and thousands of species of mold, yeast and viruses are in the air and on the surfaces around us. Together they serve as the primary ecological interface through which buildings influence human biology. In this light, we are beginning to view indoor environments not merely as passive shelters, but as active, highly complex indoor ecosystems that actively influence our immune and endocrine function, and long-term wellbeing.
Today, we are joined by Dr. Sarah Haines, Assistant Professor at the University of Toronto and Principal Investigator of the IMEE Lab, to explore the foundational framework behind this shift. We will discuss the emerging perspective of "biologically informed architectural design" and the fact that architects and interior designers don’t just curate materials, they curate our basic microbial exposures and therefore our health and wellbeing.

Sarah Haines
Dr. Sarah R. Haines is an interdisciplinary researcher and educator working at the intersection of building science, environmental engineering, and microbiology to investigate how indoor environments shape human health. Assistant Professor in the Department of Civil and Mineral Engineering at the University of Toronto, the Principal Investigator of the Indoor Microbiology and Environmental Exposures (IMEE) Lab and member of the Hub for Advancing Buildings. She holds a BS in Environmental Engineering and an MS and PhD in Environmental Science from The Ohio State University. Her research focuses on maintaining healthy and sustainable indoor environments through detection and characterization of abiotic and biotic indoor exposures using a variety of techniques​. She integrates community-based participatory research, advanced molecular techniques (e.g., high-throughput sequencing, digital PCR, metatranscriptomics) and filter forensics to examine microbial dynamics and contaminant exposures indoors.
Her work includes studies of moisture-driven mold growth in building materials, microbial volatile organic compound emissions, and the use of filter dust to estimate airborne concentrations of contaminants and pathogens, including SARS-CoV-2. Through this research, she develops practical, evidence-based strategies to reduce harmful indoor exposures, particularly in the context of climate change and housing inequities.
Prof. Haines is a member of the American Association for Aerosol Research (AAAR) and the International Society of Indoor Air Quality and Climate (ISIAQ), as well as the Institute of Health Emergencies and Pandemics (IHEP) contributing to interdisciplinary efforts that connect indoor air quality, building performance and health. She was the 2024 recipient of the University of Toronto Faculty of Applied Science & Engineering Early Career Teaching Award, recognized for excellence in teaching and mentorship.

Team
Hosted by Kristof Irwin
Edited by Nico Mignardi
Produced by M. Walker