Ultraviolet Air and Surface Treatment
ASHRAE Technical Committee 2.9

Also, please see below the links to relevant UV presentations at the conference.

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

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.

List of UV relevant Standards and Guidelines

Additional websites / resources:

www.IUVA.org

www.nalmco.org - New GUV training course dates coming soon

www.CDC.gov