webinar Series ASHRAE: COVID-19 AND SOLUTIONS FOR IMPROVING INDOOR - - PowerPoint PPT Presentation

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Oct 14, 2023 226 likes •440 views

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

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ASHRAE: COVID-19 AND SOLUTIONS FOR IMPROVING INDOOR AIR QUALITY

Healthy Buildings

webinar Series

Jon Rumohr, TowerPinkster

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Introductions

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Moderator: Gillian Giem, Program Manager

f USGBC West Michigan

Speaker: Jon Rumohr, PE, HBDP, LEED AP BD+C Manager of Mechanical Engineering TowerPinkster

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Today’s AGENDA:

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1. Why IAQ is Important
2. ASHRAE’s Stance
3. Strategies for IAQ

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Founded in 1894 More than 57,000 members in 132 countries Mission: To serve humanity by advancing the arts and sciences

f heating, ventilation, air conditioning, refrigeration

and their allied fields. Vision: A healthy and sustainable built environment for all.

About ASHRAE

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153 Employees Top Firm in the Nation Founded in 1953 Located in Grand Rapids and Kalamazoo

ABOUT TOWERPINKSTER

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WHY WE DO IT

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ASHRAE & COVID-19

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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.

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ASHRAE & COVID-19

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So what does this mean?

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ASHRAE & COVID-19

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So what does this mean? Modifications to our built environments

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ASHRAE & COVID-19

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Filtration
Ventilation
Humidification
Ultraviolet Germicidal Irradiation (UVGI)
Bi-Polar Ionization (BPI)

So what does this mean? Modifications to our built environments

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STRATEGIES for IAQ

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.

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STRATEGIES for IAQ

Ventilation

Increase operation of ventilation systems to 2 hrs before and after

ccupancy, up to 24/7 if possible

Disable demand controlled ventilation (DCV) Open minimum outdoor air dampers to 100%

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STRATEGIES for IAQ

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

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STRATEGIES for IAQ

Humidification

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STRATEGIES for IAQ

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

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STRATEGIES for IAQ

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

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summary

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.

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Questions?

Jon Rumohr, TowerPinkster jrumohr@towerpinkster.com 269-203-5058

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References

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References

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ASHRAE: COVID-19 & Solutions For Improving Indoor Air Quality

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Thank You for attending! Please Fill out our 2 Minute Survey Register for Upcoming Webinars on usgbcwm.org/events

Thank you to our Visionary Supporters

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