Effectiveness of UV-C Light to Mitigate Coronavirus (COVID-19)

What are Coronaviruses?
Coronaviruses (CoV) are a family of enveloped viruses that were first discovered in the 1960s. Coronaviruses are most commonly found in animals, including camels and bats, and are not typically transmitted between animals and humans. However, six strains of coronavirus were previously known to be capable of transmission from animals to humans, the most well-known being SARS-CoV (Severe Acute Respiratory Syndrome Coronavirus), responsible for a large outbreak in 2003, and MERS-CoV (Middle East Respiratory Syndrome Coronavirus), responsible for an outbreak in 2012. COVID-19 is caused by a coronavirus, which was initially named 2019-novel Coronavirus, or 2019-nCoV. On February 12, 2020, International Committee on Taxonomy of Viruses named the virus SARS-CoV-2, or Severe Acute Respiratory Syndrome Coronavirus-2. The Committee determined that this coronavirus was the same species as SARS-CoV, the virus that caused a global outbreak of a respiratory illness in 2003, but a different strain, hence the designation “2”.

Source: https://www.cdc.gov/coronavirus/2019-ncov/faq.html

 

How Does UV Surface Disinfection Combat Coronaviruses?
The efficacy of its UVDI-360 Room Sanitizer to inactivate Coronavirus on surfaces has been validated by independent 3rd party laboratory testing.  UVDI-360 has been evaluated by 3M’s Fit & Filtration Testing of Repeatedly Decontaminated Protective Gear. Read the 3M Bulletin

Human Coronavirus Study Results

Test results showed a greater than 4 log (99.99%) reduction of coronavirus when exposed to the UVDI-360 Room Sanitizer for 5 minutes at a distance of 8 feet (2.4 meters).

3rd party lab results

MERS-CoV Study Results

Test results showed a greater than 5 log (99.999%) reduction of MERS-CoV when exposed to the UVDI-360 Room Sanitizer for 5 minutes at a distance of 8 feet (2.4 meters).

MERs-CoV Study

Recognized by 3M for Use Against Coronavirus on N95 Respirators

UVDI-360 Room Sanitizer is the first UV-C disinfecting robot to be recognized by global Healthcare leader 3M as a coronavirus contamination method that will not damage its respirators.  Testing validating use for up to 10 cycles on N95 respirators was conducted at M Health Fairview Hospital in Minneapolis, Minnesota in May 2020. Read the 3M Bulletin

UVDI-360 Room Sanitizer for Surface Disinfection

uvdi-360-usa-canada

How Does UV Air Disinfection Help Combat Coronaviruses?

Coronavirus is highly susceptible to germicidal UV irradiation. The table below shows that the susceptibility of coronavirus to UV is greater than 3 times compared to the influenza (common cold) virus.

airstream chart

Delivering the Correct UV Dose for Coronavirus

The application challenge is to ensure the targeted organism is exposed to sufficient UV dose in the available space and time of UV exposure.

To ensure the proper dose is applied, our proprietary software is used to model the lamp quantity and system arrangement needed for the specific application. The output of this modeling produces a very detailed report showing intensity distribution and kill rates. Factors impacting dose include: spatial constraints, airflow volume, speed, temperature, and UV device geometry and intensity.

Output Example of the Engineering Modeling Software
KILL-RATE

Third-Party Validation of UVC Effectiveness

UVDI has also conducted independent third party validation of UV efficacy against airborne bacteria and viruses, where MS2 macrophage was used as a surrogate for all viruses.

test organism chart

UVDI V-MAX™ Air Disinfection for HVAC Systems

v-max-for-web_covid-19

In-Duct Air Disinfection System

  • Designed for duct-mounting parallel to the airstream providing optimum UV exposure
  • Fixtures can be mounted internally or externally on the duct
  • Configurable to meet airstream kill rates up to 99% - backed by computational models to ensure performance
  • Prewired lamp connection reduces installation time
  • Low power consumption with universal voltage input
  • Available in 21", 33", 48" and 61" lamp lengths
v-max-grid-for-web_covid-19

AHU Air Disinfection System

  • Easy to install in both existing and new equipment
  • Scalable design to fit any plenum size
  • Lamps can be easily mounted on vertical supports
  • Configurable to meet airstream kill rates up to 99% - backed by computational models to ensure performance
  • Minimal space required for installation
  • Negligible pressure drop
  • Low power consumption with universal voltage input
  • Available in 21", 33", 48" and 61" lamp lengths

Government / Industry Recommendations for Airborne Infection Control

CDC

Interim Infection Prevention and Control Recommendations for Patients with Confirmed Coronavirus Disease 2019 (COVID-19) or Persons Under Investigation for COVID-19 in Healthcare Settings.

Source: https://www.cdc.gov/coronavirus/2019-ncov/infection-control/control-recommendations.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fcoronavirus%2F2019-ncov%2Fhcp%2Finfection-control.html

CDC recommends the use of Ultraviolet Germicidal Irradiation (UVGI) as one of the effective technologies to minimize the spread of airborne microorganisms.

7. Implement Environmental Infection Control

 

uvgi

ASHRAE Guidance

ASHRAE has developed proactive guidance ashrae.org/COVID19 to help address coronavirus concerns with respect to the operation and maintenance of HVAC systems. These include ASHRAE’s recently approved position document on airborne infectious diseases and links to the latest practical standards and guidelines.

ASHRAE recommends the following strategies of interest to address disease transmission: dilution ventilation, laminar and other in-room flow regimes, differential room pressurization, personalized ventilation, source capture ventilation, filtration (central or unitary), and UVGI (upper room, in-room, and in the airstream).