ASHRAE: Mitigating Airborne Infection Transmission with HVAC Systems
“The airflow path matters because air is the primary carrier of heat, moisture, contaminant, and airborne particulates in buildings”
Kishor Khankari, Ph.D., Fellow ASHRAE, ASHRAE Distinguished Lecturer and president at AnSight LLC in Ann Arbor, Mich.
Watch the airflow path as Coronavirus spreads through the indoor air
Computational Fluid Dynamics
documents why viruses must be mitigated in the indoor occupied spaces, not through the HVAC / Ventilation system
CFD Simulation Videos & Photos from HOLT Architects in Ithaca, NY
The 1st Cough
The 2nd Cough, 5.5 minutes later
Click on the pictures above and below for a closer view or watch the videos below.
What happens after the 1st cough & after the 2nd cough? What happens in between?
Transmission occurs between people within the Occupied Spaces.
Viral Droplets & Bioaerosols are Airborne & Travel Significant Distances Quickly in the Indoor Environment. The problem of transmission needs to be addressed first in the occupied spaces (immediately, directly and continuously) where the people are . . . NOT in the HVAC system.
Key Questions:
1) Do you know how safe the air is within your facility?
2) How the air travels between the supply and the return?
3) How do you identify and document your Indoor Air Quality?
4) Do you disinfect the indoor air? if so, how? And how effective is it?
5) Are your mitigation strategies working? How do you know?
6) Can you assure your occupants that they are safe? How?
We can help, give us a call for more information.
#1 How Coronavirus Spreads Indoors | 3 Coughs | No Mask | 10 Minutes | Part 1 | View 1 | 2:09 mins
#2 How Coronavirus Spreads Indoors | 3 Coughs | With Mask | 10 Minutes| Part 1 | View 2 | 2:18 mins
#3 How Coronavirus Spreads Indoors | 3 Coughs | No Mask | 10 Minutes | Part 1 | View 3 | 1:00 mins
#4 How Coronavirus Spreads Indoors | 3 Coughs | No Mask | 10 Minutes | Part 1 | View 4 | 1:00 mins
ePlus provides IAQ solutions that purify, disinfect, filter & clean the air:
- SafeTraces veriDART uses DNA-tagged liquid tracer aerosols to simulate the emission, transport, and management of respiratory aerosols in buildings
- IAQ Sensors & Continuous Monitoring in the breathing zone
- Fan-Powered UVC Air Disinfection in the Breathing Zone: Highly effective layer that increases the equivalent ACH without increasing the OA while disinfecting the air
- In the Floor Zone: Air Cleaning for Particles & Disinfection of Airborne Viruses
- UVC 245nm Air & Surface Disinfection in the HVAC unit & ventilation system
- TriDim & HEPA Corp Air Filtration Systems