Infection Risk Estimation for Airborne Transmission
by
BEESL
&
BEST
Lab @ Syracuse University
Input
Base model
Disease
Disease
COVID-19
Influenza
Rhinovirus
Tuberculosis
SARS
Measles
Emission (quanta/h)
Infectious particle size distribution
0.3-1um
1-3um
3-10um
20%
30%
50%
20
50
Room
Type
Office
Conference room
Classroom
Lobby
Guest room
Bistro
Ballroom
Guest room
Exposure duration (h)
Area (m
2
)
Height (m)
Room configuration
Open space
Semi-open space
Ventilation efficiency
Occupant
Total (#persons)
Infector (#persons)
Activity
Sleeping
Sitting
Light intensity (Walking)
Moderate intensity (Running)
Heavy intensity
Inhalation (m
3
/h)
Mask (infector)
None
Cloth
Surgical
N95
Mask efficiency - infector (%)
Mask (susceptible)
None
Cloth
Surgical
N95
Mask efficiency - susceptible (%)
HVAC System
Total supply air (m
3
/h)
Return air fraction (%)
Filter
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
Operation duration (%)
100
Ventilation mode
Mixing
Displacement
Personal
Displacement+Personal
Ventilation efficiency
Devices
Air cleaner (CADR, m
3
/h)
Operation duration (%)
0
Upper-room UVGI (h
-1
)
Operation duration (%)
0
Parametric analysis
Control parametric analysis
Analyzing the effect of control parameters on risk (3 parameters maximum)
HVAC total supply air (m
3
/h)
100% duration time assumed
a.
b.
c.
d.
HVAC return air fraction (%)
100% duration time assumed
a.
b.
c.
d.
HVAC filter
100% duration time assumed
a.
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
b.
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
c.
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
d.
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
Air cleaner CADR (m
3
/h)
100% duration time assumed
a.
b.
c.
d.
Upper-room UVGI (h
-1
)
100% duration time assumed
a.
b.
c.
d.
Strategies
Strategy 1
Ventilation system
Total supply air (m
3
/h)
Return air fraction (%)
Filter
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
Operation duration (%)
100
Ventilation mode
Mixing
Displacement
Personal
Displacement+Personal
Ventilation efficiency
In-room devices
Air cleaner (CADR, m
3
/h)
Operation duration (%)
0
Upper-room UVGI (h
-1
)
Operation duration (%)
0
Room configuration
Room configuration
Open space
Semi-open space
Ventilation efficiency
Personal protective equipment
Mask (infector)
None
Cloth
Surgical
N95
Mask (susceptible)
None
Cloth
Surgical
N95
Strategy 2
Ventilation system
Total supply air (m
3
/h)
Return air fraction (%)
Filter
None
MERV1
MERV2
MERV3
MERV4
MERV5
MERV6
MERV7
MERV8
MERV9
MERV10
MERV11
MERV12
MERV13
MERV14
MERV15
MERV16
HEPA
Operation duration (%)
100
Ventilation mode
Mixing
Displacement
Personal
Displacement+Personal
Ventilation efficiency
In-room devices
Air cleaner (CADR, m
3
/h)
Operation duration (%)
0
Upper-room UVGI (h
-1
)
Operation duration (%)
0
Room configuration
Room configuration
Open space
Semi-open space
Ventilation efficiency
Personal protective equipment
Mask (infector)
None
Cloth
Surgical
N95
Mask (susceptible)
None
Cloth
Surgical
N95
Add strategy
Delete strategy
More
Output
Base model results
Infection Possibility
Risk cannot be estimated
Steady-state
Unsteady-state
Parametric analysis
Control parametric analysis
Strategy analysis
Strategy analysis
Strategy analysis
Infection Possibility
Risk cannot be estimated
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