ABCDEFGHIJKLMNOPQRSTUVWXYZ
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OccupancyUnits
Calculations
Units
Convert air changes per hour (ACH)
TimeConcentrationDoseRel Risk
7
Number of unmasked people in the room
90Persons
Feet to meters conversion
0.305feet / meter
to cubic feet per minute (CFM):
0000
8
Background infection rate per 100,000
560
#infections/100,000
Room volume1075.261
cubic meters (V)
ACHCFM11.4589567520.024315945870.000002294664968
9
Maximum particle emission rate per minute
7674#Prtcls/minute
Low rate emissions per hour
19188.000#Prtcls/hour7.114499.7412522.6969245750.069264688770.000006536420821
10
Minutes per hour at max rate
10.8
Playing minutes
High rate emissions per hour
82879.200#Prtcls/hour33.7473767740.13172096830.0000124303407
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Low emission rate, particles per minute
390#Prtcls/minute
Particle emissions per hour
102067.200
#Prtcls/hour (Ep)
44.638716440.2090329090.00001972617048
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Number of infectious individuals
1Persons
Emission rate per unit volume
94.923
#Prtcls/cubic meter (Ep/V)
55.3950444270.29895031610.00002821156213
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Virus attack rate
1%
Particle removal rate
9.855
#Prtcls/(cubic meter * hours) (λ)
66.0368110260.39956383320.00003770633212
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Occupancy time
2.667hours
Steady state concentration
9.632
#Prtcls/cubic meter (c∞)
76.5813689080.5092533150.00004805758938
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Room Dimensions
Probability of at least one infectious
0.397
Probability someone in the room is infectious (P1)
87.0434423270.62664402050.00005913560135
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Length (feet)83feet
Relative risk (per hour of exposure)
0.001
Relative risk to all susceptible individuals (Hr)
97.4355252480.75056944130.00007083028611
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Width30feet
Transmission probability (per hour)
0.088
Probability that virus is transmitted to a susceptible person per hour of exposure
107.7682191670.88003976070.00008304823593
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Ceiling height15.25feetRelative risk 0.002
Total relative risk to all susceptible individuals
118.0505197681.014215090.00009571019158
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Transmission probability
0.235
Probability that virus is transmitted to a susceptible person
128.2900601511.1523827590.0001087488993
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Airflow Rates
Community background infection rate (per 100,000 people)
138.4933172291.2939380470.0001221072922
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HVAC airflow (CFM)
4500
Cubic feet/minute
COVIDState pop.10701022
Total population of your state
148.6657868531.4383678270.0001357369474
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HVAC percent outside air
100%InfluenzaCases
Number of cases reported in the state
158.8121324151.5852367010.0001495967767
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Other fresh air sources (CFM)
1737
Cubic feet/minute
PneumoniaRate0
Calculated rate per 100,000 residents
168.9363109391.7341752170.0001636519155
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179.0416800781.8848698850.0001778727801
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Charts189.1310888992.03705470.0001922342681
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199.206954922.1905039480.0002067150791
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209.2713294762.3450261060.0002212971391
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219.3259531852.5004586590.000235965112
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229.3723030132.6566637090.0002507059844
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239.4116322082.8135242460.0002655087143
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249.445004192.9709409830.0002803639321
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259.4733213013.1288296710.0002952636873
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269.4973492043.2871188250.0003102012339
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279.5177375893.4457477840.0003251708477
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289.5350377343.604665080.0003401676713
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299.5497174183.7638270370.0003551875833
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309.5621735623.9231965960.0003702270864
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319.5727429684.0827423120.0003852832133
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329.581711424.2424375030.0004003534458
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339.5893214174.4022595260.0004154356475
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349.5957787234.5621891720.0004305280052
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359.6012579384.7222101370.0004456289808
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369.6059072134.8823085910.0004607372688
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379.609852265.0424727950.0004758517616
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389.6131997495.2026927910.0004909715193
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399.6160401925.3629601280.0005060957446
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409.6184503915.5232676340.0005212237607
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419.6204955175.6836092260.0005363549933
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429.6222308665.8439797410.0005514889553
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439.6237033616.0043747970.0005666252333
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449.6249528176.1647906770.0005817634765
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459.6260130166.3252242270.0005969033871
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469.6269126276.4856727710.0006120447126
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479.6276759736.6461340370.0006271872388
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489.6283236956.8066060990.0006423307837
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499.6288733066.967087320.000657475193
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509.6293396677.1275763150.0006726203359
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519.6297353897.2880719050.0006877661011
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529.630071177.4485730910.0007029123945
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539.630356097.6090790260.0007180591359
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549.6305978537.769588990.0007332062577
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559.6308029967.9301023730.000748353702
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569.6309770668.0906186580.0007635014202
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579.631124778.2511374040.0007786493707
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589.6312501018.4116582390.0007937975182
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599.6313564488.5721808460.0008089458331
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609.6314466868.7327049580.0008240942899
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