Coalition for Community & Healthcare Acquired Infection Reduction
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CHAIR believes UV technology is key to cost effective transformation of community and healthcare spaces including schools, hospitals and long term care.

Biologically Clean Air

CHAIR recommends a Target Contamination Level (TCL) of <5 CFU / m³ in healthcare spaces. 

To achieve this, CHAIR recommends:

 

  • MERV 13 to HEPA grade filters
  • 6 ACH 
  • 1 of: 
    • Displacement ventilation
    • Extraction ventilation
    • Upper Air GUV (UV 254) 
    • Far GUV (UV 222) 

 

                               

 

 


Germicidal UV (GUV)

Upper air GUV is the most effective protection against airborne transmission of disease for healthcare and community spaces. 

 

GUV can provide equivalent Air Changes per Hour(eACH) in the order of 10 to 100 to 1000 - fold greater then ventilation alone. 

 

CERN / WHO / ARIA Airborne Risk Calculator links:

https://partnersplatform.who.int/aria

https://partnersplatform.who.int/tools/aria/calculator

CAiMIRA | CERN Airborne Model for Indoor Risk Assessment

 

CERN Cost-Benefit Analysis of FarUV

Cost-Benefit Analysis of Far-UVC Lamps for Reducing Indoor Infection Transmission in Switzerland and Germany: Insights from the CERN Airborne Model for Indoor Risk Assessment (CAiMIRA) | medRxiv

 

Eadie 2022 FarUV Study showing Effective Reduction to “Biologically Clean” level

Far-UVC (222 nm) efficiently inactivates an airborne pathogen in a room-sized chamber | Scientific Reports

 

 

GUV systems should be installed, commissioned, and serviced only by trained professionals. 

 

For healthcare applications in Canada, see CSA Z8000: 24, Healthcare facilities and CSA Z317.12: 25, Cleaning and disinfecting of healthcare facilities. 

 

In Canada, GUV devices are registered by Health Canada PMRA. 

 


Supporting Members

 


Do you want to learn more about contributing to safe spaces? Take a look at our resources.