Includes MIAQC Annual Member Business Meeting
Date:
Tuesday, September 15, 2026
3:00 p.m. – 4:15 p.m.
Via Zoom
Fees: $0 for MIAQC Members; $35 for Nonmembers
About this training…
As cannabis legalization becomes more widespread, a new indoor air quality challenge is emerging for building owners, landlords, employers, schools, and public health professionals. What do we know about secondhand and thirdhand cannabis smoke and the chemical residues it leaves behind on indoor surfaces? How does it compare to tobacco smoke? And what are the implications for people living in living or working in multi-unit buildings?
This practical, evidence-based presentation examines the current science on cannabis and its impact on indoor air quality. We’ll review what research tells us about the health effects of secondhand exposure, as well as thirdhand exposure involving persistent chemical residues that settle on and accumulate on indoor surfaces such as walls, flooring, furniture, and ventilation systems. We will also consider how these residues may be re-emitted into indoor air or transferred through contact, with particular attention to children and other vulnerable populations.
In this session you’ll also learn how cannabis smoke and associated compounds move through buildings, why smoke migration can be difficult to control, and how both airborne contaminants and surface-bound residues contribute to overall exposure. We will discuss what building science teaches us about reducing occupant exposure to both inhaled smoke and persistent contamination that remains long after active smoking has stopped.
Beyond the science, we’ll explore practical mitigation strategies for homes, multi-unit housing, and other occupied buildings. Topics include the limitations of ventilation and air cleaning for both airborne pollutants and surface residues, building design and maintenance practices that reduce smoke transfer and contamination, effective smoke-free policies, and other evidence-based approaches for protecting occupants while balancing the rights and responsibilities of building owners and residents.
Whether you are a building professional, property manager, public health practitioner, housing provider, or indoor air quality consultant, you’ll leave with a better understanding of this rapidly evolving issue and practical tools to help create healthier indoor environments.
Who should attend:
Building professionals, property managers, public health practitioners, landlords and other housing providers, IAQ consultants, remediation and restoration professionals, or anyone interested in learning about the effects of indoor cannabis use.
By attending this training, you will learn
- Actionable strategies to prevent secondhand and thirdhand exposures to cannabis smoke and residue
- An overview of the available science on Cannabis and IAQ
- How cannabis compounds stick to and travel through buildings and building components
- Source control for Cannabis smoke (and tobacco smoke)
- Efficacy of ventilation and air cleaning
Program Presenter: Kristofer Anderson, President – KG Anderson, Bath, ME
Kris is an experienced mechanical engineer with a successful history of hands-on field experience, and design experience, in construction and construction management, electrical systems, mechanical systems. Today he specializes in building forensics and diagnostics, indoor air quality, and energy efficiency. He has a Bachelor of Science in Mechanical Engineering from Norwich University and is a licensed Professional Engineer in Maine.
Continuing Education Credits Available
| Type of Credit | # Credits |
|---|---|
| BOC | Self-Submit for Consideration |
| BPI | 2.0 units |
| AIA | 2 HSW LU credits |
| Code Enforcement Officers | 2.0 hours in Residential Ventilation |
| Engineers | Self-Report with Certificate of Attendance |
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Questions?
Have specific questions you want answered during the webinar? Consider submitting them to the presenter in advance! Email your questions to: christy@maineindoorair.org at least 60 minutes prior to webinar start.
Questions about registration and donations can be directed to the office of the Maine Indoor Air Quality Council. Call 207-626-8115 or e-mail christy@maineindoorair.org.
