Manual

1. The HTRAM’s preset PPM measurements for each Activity Level are subjective standards
based on Honeywell’s assessment of U.S. state statutory limits and scientific studies,
including the “2020 COVID-19 Aerosol Transmission Estimator” and the “Exhaled CO2 as
a COVID-19 Infection Risk Proxy for Different Indoor Environments and Activities”
article from the University of Colorado-Boulder (see
https://docs.google.com/spreadsheets/d/16K1OQkLD4BjgB
dO8ePj6ytf-RpPMlJ6aXFg3PrIQBbQ/edit#gid=519189277 and https://
pubs.acs.org/doi/10.1021/acs.estlett.1c00183, respectively) . The user must verify
applicable standards or regulations and adapt the product’s thresholds to such
standards and regulations as required for its usage intended by the user.
2. Please note: A Green designation does not mean no risk for transmission. An increase
from Green to Yellow, Yellow to Red or Green to Red does not indicate a linear increase
in potential transmission risk within one Activity Setting. Any increase in potential
transmission risk across multiple Activity Settings is also not linear. Numerous
factors, including without limitation, interaction among individuals in a room, the
number of infected individuals present, and the wearing of Personal Protective
Equipment (PPE) such as masks and gloves, will affect the potential transmission
risk. Users should not rely solely on this device to make a determination of safety.
3. Percent of infection risk calculation is based on the following assumptions and is
only intended as guidance: Total number of people: 20, Infected: 1; Time duration: 30
mins and room size: 900sqft.
4. Percent of infection risk calculation is based on the following assumptions and is only
intended as guidance: Total number of people: 20, Infected: 1; Time duration: 45
mins and room size: 900sqft.
5. Percent of infection risk calculation is based on the following assumptions and is
only intended as guidance: Total number of people: 20, Infected: 1; Time duration: 60
mins and room size: 900sqft.
The device has three pre-programmed scenario settings
based on activity levels.
• Low activity: Reading, quietly talking, Breathing rate
(susceptibles): 0.252 m3/h, CO2 emission rate/person:
0.0052 (@ 273 K and 1 atm), Quanta exhalation rate
(infected): 9.4 quanta/h, activity duration for 30 minutes
• Medium activity: Eating, talking loudly, Breathing rate
(susceptibles): 1.2 m3/h, CO2 emission rate/person:
0.012 (@ 273 K and 1 atm), Quanta exhalation rate
(infected): 170 quanta/h, activity duration for 45 minutes
• High activity: Running, jumping, exercising, Breathing
rate (susceptibles): 3 m3/h, CO2 emission rate/person:
0.016 (@ 273 K and 1 atm), Quanta exhalation rate
(infected): 408 quanta/h, activity duration for 60 minutes
SCENARIO SELECTION
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