Healthy Buildings webinar Series ASHRAE: COVID-19 AND SOLUTIONS FOR IMPROVING INDOOR AIR QUALITY Jon Rumohr, TowerPinkster
Healthy Buildings webinar Series Introductions Moderator: Gillian Giem, Program Manager of USGBC West Michigan Speaker: Jon Rumohr, PE, HBDP, LEED AP BD+C Manager of Mechanical Engineering TowerPinkster
Healthy Buildings webinar Series Today’s AGENDA: 1. Why IAQ is Important 2. ASHRAE’s Stance 3. Strategies for IAQ
Healthy Buildings webinar Series About ASHRAE Founded in 1894 More than 57,000 members in 132 countries Mission: To serve humanity by advancing the arts and sciences of heating, ventilation, air conditioning, refrigeration and their allied fields. Vision: A healthy and sustainable built environment for all.
ABOUT TOWERPINKSTER 153 Employees Top Firm in the Nation Founded in 1953 Located in Grand Rapids and Kalamazoo
WHY WE DO IT
ASHRAE & COVID-19 Healthy Buildings webinar Series ASHRAE leadership has approved the following two statements regarding transmission of SARS-CoV-2 and the operation of HVAC systems during the COVID-19 pandemic. Transmission of SARS-CoV-2 through the air is sufficiently likely that airborne exposure to the virus should be controlled. Changes to building operations, including the operation of heating, ventilating, and air-conditioning systems, can reduce airborne exposures. Ventilation and filtration provided by heating, ventilating, and air-conditioning systems can reduce the airborne concentration of SARS-CoV-2 and thus the risk of transmission through the air. Unconditioned spaces can cause thermal stress to people that may be directly life threatening and that may also lower resistance to infection. In general, disabling of heating, ventilating, and air-conditioning systems is not a recommended measure to reduce the transmission of the virus.
ASHRAE & COVID-19 Healthy Buildings webinar Series So what does this mean?
ASHRAE & COVID-19 Healthy Buildings webinar Series So what does this mean? Modifications to our built environments
ASHRAE & COVID-19 Healthy Buildings webinar Series So what does this mean? Modifications to our built environments Filtration • Ventilation • Humidification • Ultraviolet Germicidal Irradiation (UVGI) • Bi-Polar Ionization (BPI) •
STRATEGIES for IAQ Healthy Buildings webinar Series Filtration ASHRAE recommends improving central air filtration to MERV-13 minimum, or the highest compatible with the filter racks. Care needs to be taken to ensure the fan systems can support the added pressure drop.
STRATEGIES for IAQ Healthy Buildings webinar Series Ventilation Increase operation of ventilation systems to 2 hrs before and after occupancy, up to 24/7 if possible Disable demand controlled ventilation (DCV) Open minimum outdoor air dampers to 100%
STRATEGIES for IAQ Healthy Buildings webinar Series Humidification Maintain space relative humidity between 40% and 60% Improves respiratory function - Reduces viability of viruses and bacteria - Improves Comfort - Review with ventilation strategy - Long Term maintenance and energy costs -
STRATEGIES for IAQ Healthy Buildings webinar Series Humidification
STRATEGIES for IAQ Healthy Buildings webinar Series Ultraviolet Germicidal Irradiation (UVGI) Works best for direct line of site sterilization Apply within air handlers to treat coils and - filters Prevents mold, bacteria, and biofilm. - Long Term maintenance and energy costs -
STRATEGIES for IAQ Healthy Buildings webinar Series Bi-Polar Ionization (BPI) Treats both air streams and surfaces Apply within air handlers and ductwork - Adds negatively charged particles to the - airstream rendering bacteria and virus inert Added benefit of odor and voc reduction -
summary Healthy Buildings webinar Series STRATEGIES FOR IAQ There’s no one-size fits all approach. - Each solution should be reviewed by an - HVAC professional and tailored to the building and occupants.
Healthy Buildings webinar Series Questions? Jon Rumohr, TowerPinkster jrumohr@towerpinkster.com 269-203-5058
References Healthy Buildings webinar Series References •
Healthy Buildings webinar Series ASHRAE: COVID-19 & Thank you to our Visionary Supporters Solutions For Improving Indoor Air Quality Thank You for attending! Please Fill out our 2 Minute Survey Register for Upcoming Webinars on usgbcwm.org/events
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