Discover and read the best of Twitter Threads about #ICFUST
Most recents (9)
[1]Looking to the future of Far-UVC
Catherine Noakes, University of Leeds
@CathNoakes
#ICFUST
#ICFUST2023
Catherine Noakes, University of Leeds
@CathNoakes
#ICFUST
#ICFUST2023
[2]written in direct response to the conference (and during the conference) reminder: COVID has caused enormous caseload and death and pre COVID lower respiratory infection was already #4 cause of worldwide death.
[3] This is a huge health challenge worldwide
three vectors for air and infection: communicable diseases( TB measles, flu), opportunistic pathogens (aspergillusm, NTMs, etc), airborne role in other infections (mrsa, c diff, norovirus)
three vectors for air and infection: communicable diseases( TB measles, flu), opportunistic pathogens (aspergillusm, NTMs, etc), airborne role in other infections (mrsa, c diff, norovirus)
[1]How it goes forward: A blueprint for communication
with the public about GUV
Kathleen McPhaul, University of Maryland
#ICFUST
#ICFUST2023
with the public about GUV
Kathleen McPhaul, University of Maryland
#ICFUST
#ICFUST2023
[2] (First shout to Balvi for the support on this one! (
Going to address health literacy. The context is the extreme importance of getting the messaging right and letting this space make the change it can
Going to address health literacy. The context is the extreme importance of getting the messaging right and letting this space make the change it can
[3] Examples of health messaging that went off track from a public health messaging perspective:
mask effectiveness: they work, they worked, that message was missed. Vaccinations work, but the term "break through" diminished (as opposed to "saving lives, decreasing illness, etc"
mask effectiveness: they work, they worked, that message was missed. Vaccinations work, but the term "break through" diminished (as opposed to "saving lives, decreasing illness, etc"
[1] Roundtable discussion with participants from both governmental and non-governmental agencies on future regulatory pathways for Far-UVC
#ICFUST
#ICFUST2023
#ICFUST
#ICFUST2023
[2] Moderator: Lew Radonovich (CDC, NIST)
Participants: Belal Abboushi (Pacific Northwest National Laboratory), Aline Heffernan (EPA Office of Pesticide Programs), Cameron Miller (NIST), David Sliney (perspectives from ACGIH), Richard Vincent (perspectives from ASHRAE)
Participants: Belal Abboushi (Pacific Northwest National Laboratory), Aline Heffernan (EPA Office of Pesticide Programs), Cameron Miller (NIST), David Sliney (perspectives from ACGIH), Richard Vincent (perspectives from ASHRAE)
[3] Lew Radonovich (CDC) opens that we will discuss the regulatory space(or really lack of)
NIOSH in US is focused on occupational safety and health, seek knowledge and apply it to the workplace. Will move through the panel now.
NIOSH in US is focused on occupational safety and health, seek knowledge and apply it to the workplace. Will move through the panel now.
[1] Accurate germicidal efficacy and photobiological hazard measurement of far-UVC sources.
Mike Clark, Gigahertz Optik GmbH
#ICFUST2023
#ICFUST
Mike Clark, Gigahertz Optik GmbH
#ICFUST2023
#ICFUST
[2] Need better meters especially between fluence and irradiance. UV radiomerters - widely used, convenient
UVspectroradiometers - much more comprehensive
UVspectroradiometers - much more comprehensive
[3] Radiometers often calibrated for near radiation. Most commercial radiometers don't cover the range of Far UV-C. Also need to match spectral response to wavelength of interest or big errors. Knowledge of light source used in calibration is very important!
[1] Impact of test methods on Far-UVC performance against bioaerosols
Katherine Ratliff, U.S. Environmental Protection Agency
#ICFUST
#ICFUST2023
Katherine Ratliff, U.S. Environmental Protection Agency
#ICFUST
#ICFUST2023
[2] How effect? how to compare tech types? How can lab results be used to inform predictions?
How do extrapolate lab tests to real world applications?
How do extrapolate lab tests to real world applications?
[3] Use large bioaerosol test chamber(10x12x25 feet) with mock HVAC system.
Use MS2 as surrogate, and most importantly also did replicates.
Quantify log reduction and CADR of 222nm lamps and portable HEPA air cleaners.
Use MS2 as surrogate, and most importantly also did replicates.
Quantify log reduction and CADR of 222nm lamps and portable HEPA air cleaners.
[1]Far-UV Air disinfection performance testing standards
Wladyslaw Kowalski, Sanuvox
#ICFUST
#ICFUST2023
Wladyslaw Kowalski, Sanuvox
#ICFUST
#ICFUST2023
[2] Opening with ASHREA 241P, target for 4-6 ACH, also opens door to eACH considerations which is good.
How do compare tech?
Watts/eACH?
$/eACH?
Risk/eACH?
Note uses EAC(but I am going to use eACH since I feel we see that more).
How do compare tech?
Watts/eACH?
$/eACH?
Risk/eACH?
Note uses EAC(but I am going to use eACH since I feel we see that more).
[3] Performance standards can be use to determine eACH. Going through in-duct performance, and is fairly straight forward to convert to eACH.
In room standards:
AHAM AC-5, ASTM, ASHREA[too fast for me to type all]
In room standards:
AHAM AC-5, ASTM, ASHREA[too fast for me to type all]
[1]Regulatory framework surrounding UV-C and influencers to the regulatory process
Paul Jensen, Final Approach Inc.
#ICFUST
#ICFUST2023
Paul Jensen, Final Approach Inc.
#ICFUST
#ICFUST2023
[2] video: Budlight pilot video
Need to balance risk with benefit, as well as cost and benefit. Risks of secondary adverse health effect, and need to look at the whole picture.
Need to balance risk with benefit, as well as cost and benefit. Risks of secondary adverse health effect, and need to look at the whole picture.
[3]Risk of infection w/ no intervention, risk w/ intervention, risk of transient health effects
risk of secondary health effects (VOC ozone)
Risk of reduction in UV-C dose to lower secondary (ozone and VOC risk)
risk of secondary health effects (VOC ozone)
Risk of reduction in UV-C dose to lower secondary (ozone and VOC risk)
[1] #ICFUST Industry Panel Continued
Nardell: we need to think about where to make inroads. perhaps schools, but what about restaurant industry? where else?
Johansen; Easy. Malaria
Nardell: we need to think about where to make inroads. perhaps schools, but what about restaurant industry? where else?
Johansen; Easy. Malaria
[2] Johansen presented research yesterday that this is the most effective mosquito repellent ever studied)
Nardell mentions that it kills poinsettias
Nardell mentions that it kills poinsettias
[3] audience Q: Scientists answer these questions by asking whether safe via study, but public messaging needs wider data (ie absentee rate drop). Need to collect that data, but it into a database and substantiate it, so the market can turn that data into literal cost-benefit
1/ Travelling from Colorado to New York City for #ICFUST conference with low-cost air quality sensors.
New: @2b_technologies POM portable ozone monitor.
Semi-outdoors waiting for the bus:
-CO2: 588 (some exhaust)
-PM: 0 (rained yesterday *)
-VOC: 65 (low)
-O3: 15 ppb (**)
New: @2b_technologies POM portable ozone monitor.
Semi-outdoors waiting for the bus:
-CO2: 588 (some exhaust)
-PM: 0 (rained yesterday *)
-VOC: 65 (low)
-O3: 15 ppb (**)
2/ Some expl:
@RideRTD Boulder bus station, like a tunnel open on both sides. Modern diesel buses running
- some CO2 from diesels
- Ultrafine PM, low-cost sensors can't see (too small for their lasers)
- Diesels emits very low VOC
- Emit NO, which destroys O3
All checks
@RideRTD Boulder bus station, like a tunnel open on both sides. Modern diesel buses running
- some CO2 from diesels
- Ultrafine PM, low-cost sensors can't see (too small for their lasers)
- Diesels emits very low VOC
- Emit NO, which destroys O3
All checks
3/ @RideRTD airport bus, at the start of 1:15 h trip
- CO2: 944, poor ventilation as usual (likely go up)
- PM: 7, not sure higher than outdoor?
- VOC: 1789, from people, personal care products, bus materials
- O3: 5. From outside, lower bc it reacts w/ people, materials, gases
- CO2: 944, poor ventilation as usual (likely go up)
- PM: 7, not sure higher than outdoor?
- VOC: 1789, from people, personal care products, bus materials
- O3: 5. From outside, lower bc it reacts w/ people, materials, gases
