Ultraviolet Air and Surface Treatment
ASHRAE
Technical Committee
2.9
Announcements
TC 2.09 Members, Liaisons, and Visitors,
We hope you all enjoyed your Summer, and you are ready to finish 2025 strong!!
As you all know this is the 20th year for TC 2.09 and we have been busy as a TC with GPC 37 going out to public review, all of the 185 activities, and RP1873 being awarded. Some of these initiatives started just about 20 years ago and all of that work is still helping guide the industry. Thank you to all of the folks that have been a part of TC 2.09 over the last 20 years, and welcome to the new members and we encourage your involvement. We were able to find a few pictures from the very first TC 2.09 meeting!! See below:
They served “chips and dip” – these guys didn’t get it...
Some lamp manufacturers debuted the latest UV-C bulbs...using just 2 lbs. of mercury!!
Minutes
- TC 2.9 Summer 2025 Draft Main Meeting Minutes - Phoenix
- TC 2.9 Summer 2025 Draft Meeting Minutes
- TC 2.9 Summer 2024 Draft Meeting Minutes
- TC 2.9 Winter 2024 Draft Meeting Minutes
- TC 2.9 Summer 2023 Draft Meeting Minutes
- TC 2.9 Winter 2023 Draft Meeting Minutes
- TC 2.9 Summer 2022 Draft Meeting Minutes
- TC0209 Hybrid Winter Draft Minutes 20220131.pdf
- TC0209 Virtual Summer Draft Minutes 20210610
- TC0209 Virtual Winter Draft Minutes 20210201
- TC0209 Virtual Summer minutes 20200710
- TC0209 Orlando DRAFT Minutes 20200203
- TC0209 Kansas City DRAFT Minutes 20190701
Committee Chair
TC0209@ashrae.net
Committee Scope
TC 2.9 is concerned with all aspects of equipment and systems that utilize ultraviolet radiation to destroy or deactivate chemical and/or biological air and surface contaminants in HVAC systems and indoor spaces, including, but not limited to, effectiveness, safety, maintenance and economics.
Upcoming Society Conferences
ASHRAE 2026 Winter Conference
January 31 - February 4, 2026
Las Vegas, NV
https://www.ashrae.org/conferences/2026-winter-conference
Additional Information
Also, please see below the links to relevant UV presentations at the conference.
Workshop: Achieving Healthier Buildings with Lower Energy Use and Cost
Monday, February 2 8:00 AM – 9:30 AM PST
Summary:
This interactive workshop, focused on classrooms, will engage participants in exploring solutions that address the dual challenge of improving indoor air quality and reducing energy costs. Presenters will cover existing and upcoming indoor air guidelines and clean airflow strategies, with associated energy use, cost, and implementation considerations. Afterward, participants will break into small groups to brainstorm solutions for different scenarios like alternate HVAC and ventilation system types or school location. Each group will be tasked with selecting practical, cost-effective, and energy-efficient strategies that improve indoor air quality. Groups will also identify research gaps that limit their ability to develop solutions.
Chair:Gabe Arnold
Energy and Capacity Analysis of HVAC and Air Cleaning Strategies in a Classroom
Monday, February 2 8:00 AM – 8:20 AM PST
Energy and Capacity Analysis of HVAC and Air Cleaning Strategies in a Classroom
Presenting Author: Cary Faulkner, Pacific Northwest National Laboratory, Boulder, CO, USA
New indoor air quality design targets, such as ASHRAE Standard 241 (S241), have been proposed for controlling infectious aerosols in buildings. Further research is needed to assess the tradeoffs of different measures when designing to S241 for different space types. To address this gap, this research models measures including increasing outdoor air ventilation, upgrading HVAC filtration, using portable air cleaners (PACs), and installing in-duct, upper-room, or whole-room germicidal ultraviolet (GUV) systems for a classroom space type in seven climate zones. The findings offer practical guidance to meet S241 for key space types and highlight key design challenges.
Implementation, Maintenance, and Energy Costs of Classroom Building Upgrades
Monday, February 2 8:20 AM – 8:40 AM PST
Implementation, Maintenance, and Energy Costs of Classroom Building Upgrades
Presenting Author: Meghan McNulty, PE, Pacific Northwest National Laboratory, ATLANTA, GA, USA
School district and facility staff do not have easy access to cost data for different building upgrades that improve indoor air quality. Using the modelled scenarios in the previous presentation, we estimated the real-world costs of installing and using ventilation and air cleaning strategies to reduce student illnesses in a classroom with central HVAC. We provide insight to first costs and ongoing costs for both materials and labor over the lifetime of equipment, as well as installation, operation, and maintenance considerations. This information can help districts choose the building upgrades that work best for their schools.
AHR Expo Session : Germicidal Ultraviolet (GUV) Systems: Bridging Laboratory Findings to Real-World Installations to Reduce Infectious Aerosols
Tuesday, February 3 10:30 AM – 12:30 PM PST
Summary:
Germicidal Ultraviolet (GUV) technologies are gaining renewed attention as an effective and energy-efficient tool for reducing airborne disease transmission in buildings. There are emerging standards and guidelines for designing and testing the effectiveness of GUV installations, but bridging results from laboratory experiments to real-world settings remains challenging. This session will present results from recent bioaerosol and UV-sensitive DNA tracer tests in a large test chamber, along with methods for characterizing GUV fluence and airflow mixing. These findings advance methods for utilizing GUV to meet indoor air quality targets and standards, including Standard 241, Control of Infectious Aerosols.
Chair: Katherine Ratliff
Technical Committee: 2.9 Ultraviolet Air and Surface Treatment
List of UV relevant Standards and Guidelines
Additional websites / resources:
Introduction to GUV Info Hub – University of Maryland:
https://blog.umd.edu/guv-hub/
