Kepri UVC Upper-Air Disinfection System

Kepri UVC Upper-Air Disinfection System

The Excelitas LED-based Kepri™ UVC Upper-Air Disinfection System provides safe, effective, real-time disinfection of upper-level room air regardless of room occupancy. Kepri’s potent UVC energy is effective against a wide range of pathogens including bacteria, mold and viruses such as those that cause COVID-19. With a truly unique design, our Kepri UVC Upper-Air Disinfection System allows for safe and effective room air disinfection without emitting any harmful or environmentally unfriendly ozone gas.

Kepri Upper Air UVC Disinfection SystemDownload our latest white paper on "UVC LED Upper-Air Disinfection: A Cornerstone in the Fight against Coronavirus".


The Upper-Air Concept

As pathogens pass through the active UVC disinfection zone, the UVC light damages the pathogens’ DNA/RNA, preventing its ability to replicate and effectively inactivating its ability to infect and spread.  This continuous disinfection offers higher levels of effectiveness when compared to other traditional UV lamp-based air germicidal treatments at lower power.

The compact Kepri UVC Upper Air-Disinfection System is easy to install in a wide variety of spaces. Featuring low noise operation and a dust free optical chamber, this low-profile design minimizes maintenance requirements and ensures maximum UVC emission.
 

Occupant-Safe Operation

As safety is critical in UVC disinfection, Excelitas sets the industry standard with a three-tiered sensor monitoring system to ensure safe operation, even in fully occupied rooms:

  • Tilt Sensor: a safety feature to ensure no harmful UVC energy is emitted into the lower part of the room.
  • Presence Sensor: detects anyone in the UVC central emission field (i.e. changing a lightbulb on a ladder) and immediately turns off the UVC emission until the emission field is clear.
  • Motion-Activated Occupancy Sensor and Switch: detects movement in the room and allows the user to select their individual operating preference using a three position selectable switch.

Excelitas meets a stringent UL-8802 standard which limits the amount of UVC energy into the lower part of the room, assuring safe operation.
 

Effective Pathogen Elimination

Third-party testing shows that Kepri reduces the airborne viral load by 99% in as little as 20 minutes. No matter if it is bacteria, mold, or virus, Kepri effectively reduces airborne pathogens. Click here to view our Efficacy Test Report.

Kepri Effective Air Exchanges Per Hour
Notes:

1.Effective air exchanges per hour (ACH) for a room with a 10ft (3.0m) ceiling.
2.Values are extrapolated from Intertek test data dated Dec 17, 2021- available on our website. Original single point test measured a 99.9% reduction of Coliphage φX174 (typical single stranded virus) in 20 minutes. Effective air exchanges for other pathogens will differ.
3.The times given assume perfect air mixing within the space (i.e. mixing factor = 1). Disinfection rates are dependent on air mixing. The following effective air exchange (ACH) data should only be used as a best-case guideline.
4.For more information please refer to the CDC guidelines for Environmental Infection Control in Health-Care Facilities (2003) Appendix B and the CDC Upper-Room Ultraviolet Germicidal Irradiation (UVGI) web page.


Interested in learning more on the effectiveness of upper room disinfection for cleaning our indoor air? Read this latest article:  

Dr. Edward Nardell, a Professor in the Departments of Environmental Health and Immunology and Infectious Diseases from Harvard Medical School, has written a detailed article on the best ways to clean indoor properly to avoid spreading viruses. As he states in the article, viruses like SARS-CoV-2 (COVID-19) and their variants will certainly cause future problems and pandemics over time.  As a society, we need to plan scientifically how to reduce virus spread when masks are not as common. Dr. Nardell states, there are “three established and proven air disinfection technologies: mechanical ventilation, upper room GUV, and portable room air cleaners. Of these, upper room UV is the most cost-effective and is demonstrably safe and readily available to deploy today to reduce COVID-19 and other respiratory virus transmission.” 

Visit the TIME website to read more: https://time.com/6143799/covid-19-indoor-air-cleaning/
Dr. Edward A, Nardell (Feb 1, 2022).  If We’re Going to Live With COVID-19, It’s Time to Clean Our Indoor Air Properly.  TIME. 

Parameter

Value

Units
Input voltage 90/240 VAC
Input frequency 50/60 Hz
Weight (bracket and device) 5.5 (2.5) lbs (kg)
Minimum mounting height* 90.5 (2.3) in (m)
Power consumption 30 W
Wavelength (typical) 270 nm
*Measured from the bottom of the bracket
Warning: UVC ultraviolet rays are harmful to the eyes and skin. Avoid exposure to direct or reflected UVC rays.

Feature

Benefit
 Motion-activated occupancy sensor & switch offers 3 operating   modes  Safety; flexibility
 Integrated tilt sensor ensures safe upward UVC emission  Safety
 Presence sensor shuts off UVC if someone enters emission field  Safety; longer UVC lifetime; flexibility
 Energy efficient with no mercury (Hg) or ozone emission  Environmentally-friendly and safe
 Low noise operation and a dust free optical chamber  Low maintenance
 Adjustable mounting bracket, compact and light weight - 5 lbs (2.3kg)  Easy to install and small footprint for easy fit
 Replaceable LED light source   Extended product lifetime 
 Meets UL-8802 Issue 4 Standard  Safety

 Common UV Disinfection Light Sources

 Light Source
UV LED
Pulse Xenon
Mercury Vapor
Excimer
 Cost $$$ $$ $ $$$$
 Wavelength ~265nm-280nm 200nm-300nm 254nm 207nm-222nm with filter
 Advantage
• Small size
• Low voltage
• SMD packages easy to mount
• Free of Hg
• Broadband source
• Lower cost
• High efficiency
Potentially “safer” than other UV sources (w/filter) 
 Disadvantage   High cost per unit of energy Supporting electronics are expensive
• Contains Hg
• Less robust than other sources
• Limited suppliers
• Benefits unproven
• Limited sizes
Less common light sources include metal hailde and deuterium

Why use Kepri?

Kepri™ utilizes the Upper-Air disinfection concept.  With Upper-Air disinfection, pathogens pass through the active UVC disinfection zone due to natural and HVAC induced room convection.  As pathogens pass through the active UVC disinfection zone, the UVC light damages the pathogens’ DNA/RNA, preventing its ability to replicate and thus, effectively inactivating its ability to infect and spread.  This continuous disinfection offers higher levels of efficiencies when compared to other traditional UV lamp-based air germicidal treatments while offering a lower power.

Can UVC be used to inactivate viruses like SARS-CoV-2?

Yes, UVC energy can inactivate viruses’ harmful pathogens such as SARS-CoV-2, the virus that causes Covid-19. Generally speaking, UV disinfection is widely used to inactivate harmful microorganisms in the healthcare industry, in food processing, and wherever people may congregate.

Is there any microbial disinfection test data available?

Yes, we have conducted tests on hospital-acquired pathogens; please see our efficacy report available on our website. 

What is UV energy?

UV energy is found on the electromagnetic spectrum from 100 nm – 400 nm and is divided into fourparts:

  • 100nm – 200nm UVV
    • Light rays can only travel in a vacuum; if emitted in non-vacuum space in the presence of oxygen, ozone (O3) will be produced
  • 200nm – 280nm UVC
    • Light rays most harmful to DNA
  • 280nm – 320nm UVB
    • Typically used in curing and other applications
  • 320nm – 400nm UVA
    • Typically used in most LED curing applications

Do all UVC light sources contain mercury (Hg)?

No. Of the four common UVC light sources, only low-pressure and medium pressure mercury lamps contain mercury. If your design requires a mercury-free solution, LED, xenon, or excimer lighting technologies can be utilized.  The Excelitas Kepri Upper Air Disinfection System is LED based and does not contain mercury.

Does UVC disinfection happen only at 253.7 nm?

UVC disinfection happens over the entire UVC range (200 nm - 280 nm). Differences in a pathogen's peak absorption and structure can result in different optimum disinfection wavelengths. Historically, most disinfection tests were conducted at 253.7 nm because it was the peak emission wavelength of the commonly available Hg-vapor lamps.  

Do all UVC sources create ozone?

Ozone production starts below 240 nm and peaks at 185 nm. Therefore, if your light source emits above 240 nm, then there is no ozone produced. The Excelitas Kepri System emits light that does not generate ozone. 

Does Kepri filter the air while disinfecting?

While the Kepri unit effectively disinfects upper room air via UVC light, it does not use any mechanical filtration. This also means there are no filters requiring replacement.

Are there any replaceable parts on the Kepri?

The LED array is replaceable and is designed to be field serviceable.  Replacement LED arrays are available from Excelitas. Please contact us for more information.

What is the lifetime of the Kepri?

The lifetime will depend on the time of operation and the duty cycle used.  If operated continuously, the Kepri has an estimated lifetime of 2 years (ON for 12 hours per day or 8000 hours).

What is the warmup time of the Kepri?

The Kepri uses LED technology, which does not require a warmup period prior to reaching full output.  It is ready to use as soon as it is turned on. 

Does the Kepri comply to any safety and EM regulations?

Yes, the Kepri contains a three-tiered sensor monitoring system along with complying with a variety of safety and EM regulations, including the stringent UL-8802 requirement.  Please see below:

CAN/CSA C22.2 No. 250.0-18_4th Ed.  UL 1598_4th ed.-2018       
Safety standard for L
UL 8802_Issue 4_August-2021

 

IEC 61010-1:2010/A1:2016           Safety requirements for electrical equipment for measurement, control, and laboratory use

EN 61010-1:2010/A1:2018            Safety requirements for electrical equipment for measurement, control, and laboratory use

IEC 62471:2006 (First Edition)      Photobiological Safety of Lamps and Lamp Systems

 

Can Excelitas conduct a Covid-19 disinfection test?

External partners conduct our entire microbiological tests. SARS-CoV-2, the virus that causes Covid-19, is pathogenic and can be inhaled; this requires a biohazard level 3 facility. Often surrogates (similar pathogens) are used to test the effectiveness of a device; these tests typically happen at biohazard 1 facilities. However, recent studies have shown the effectiveness of UVC in the mitigation of airborne and surface-bound pathogens, particularly SARS-CoV-2.  Refer to: UV Inactivation of SARS-CoV-2 across the UVC Spectrum: KrCl* Excimer, Mercury-Vapor, and Light-Emitting-Diode (LED) Sources (nih.gov) 


Parameter

Value

Units
Input voltage 90/240 VAC
Input frequency 50/60 Hz
Weight (bracket and device) 5.5 (2.5) lbs (kg)
Minimum mounting height* 90.5 (2.3) in (m)
Power consumption 30 W
Wavelength (typical) 270 nm
*Measured from the bottom of the bracket
Warning: UVC ultraviolet rays are harmful to the eyes and skin. Avoid exposure to direct or reflected UVC rays.

Feature

Benefit
 Motion-activated occupancy sensor & switch offers 3 operating   modes  Safety; flexibility
 Integrated tilt sensor ensures safe upward UVC emission  Safety
 Presence sensor shuts off UVC if someone enters emission field  Safety; longer UVC lifetime; flexibility
 Energy efficient with no mercury (Hg) or ozone emission  Environmentally-friendly and safe
 Low noise operation and a dust free optical chamber  Low maintenance
 Adjustable mounting bracket, compact and light weight - 5 lbs (2.3kg)  Easy to install and small footprint for easy fit
 Replaceable LED light source   Extended product lifetime 
 Meets UL-8802 Issue 4 Standard  Safety

 Common UV Disinfection Light Sources

 Light Source
UV LED
Pulse Xenon
Mercury Vapor
Excimer
 Cost $$$ $$ $ $$$$
 Wavelength ~265nm-280nm 200nm-300nm 254nm 207nm-222nm with filter
 Advantage
• Small size
• Low voltage
• SMD packages easy to mount
• Free of Hg
• Broadband source
• Lower cost
• High efficiency
Potentially “safer” than other UV sources (w/filter) 
 Disadvantage   High cost per unit of energy Supporting electronics are expensive
• Contains Hg
• Less robust than other sources
• Limited suppliers
• Benefits unproven
• Limited sizes
Less common light sources include metal hailde and deuterium

Why use Kepri?

Kepri™ utilizes the Upper-Air disinfection concept.  With Upper-Air disinfection, pathogens pass through the active UVC disinfection zone due to natural and HVAC induced room convection.  As pathogens pass through the active UVC disinfection zone, the UVC light damages the pathogens’ DNA/RNA, preventing its ability to replicate and thus, effectively inactivating its ability to infect and spread.  This continuous disinfection offers higher levels of efficiencies when compared to other traditional UV lamp-based air germicidal treatments while offering a lower power.

Can UVC be used to inactivate viruses like SARS-CoV-2?

Yes, UVC energy can inactivate viruses’ harmful pathogens such as SARS-CoV-2, the virus that causes Covid-19. Generally speaking, UV disinfection is widely used to inactivate harmful microorganisms in the healthcare industry, in food processing, and wherever people may congregate.

Is there any microbial disinfection test data available?

Yes, we have conducted tests on hospital-acquired pathogens; please see our efficacy report available on our website. 

What is UV energy?

UV energy is found on the electromagnetic spectrum from 100 nm – 400 nm and is divided into fourparts:

  • 100nm – 200nm UVV
    • Light rays can only travel in a vacuum; if emitted in non-vacuum space in the presence of oxygen, ozone (O3) will be produced
  • 200nm – 280nm UVC
    • Light rays most harmful to DNA
  • 280nm – 320nm UVB
    • Typically used in curing and other applications
  • 320nm – 400nm UVA
    • Typically used in most LED curing applications

Do all UVC light sources contain mercury (Hg)?

No. Of the four common UVC light sources, only low-pressure and medium pressure mercury lamps contain mercury. If your design requires a mercury-free solution, LED, xenon, or excimer lighting technologies can be utilized.  The Excelitas Kepri Upper Air Disinfection System is LED based and does not contain mercury.

Does UVC disinfection happen only at 253.7 nm?

UVC disinfection happens over the entire UVC range (200 nm - 280 nm). Differences in a pathogen's peak absorption and structure can result in different optimum disinfection wavelengths. Historically, most disinfection tests were conducted at 253.7 nm because it was the peak emission wavelength of the commonly available Hg-vapor lamps.  

Do all UVC sources create ozone?

Ozone production starts below 240 nm and peaks at 185 nm. Therefore, if your light source emits above 240 nm, then there is no ozone produced. The Excelitas Kepri System emits light that does not generate ozone. 

Does Kepri filter the air while disinfecting?

While the Kepri unit effectively disinfects upper room air via UVC light, it does not use any mechanical filtration. This also means there are no filters requiring replacement.

Are there any replaceable parts on the Kepri?

The LED array is replaceable and is designed to be field serviceable.  Replacement LED arrays are available from Excelitas. Please contact us for more information.

What is the lifetime of the Kepri?

The lifetime will depend on the time of operation and the duty cycle used.  If operated continuously, the Kepri has an estimated lifetime of 2 years (ON for 12 hours per day or 8000 hours).

What is the warmup time of the Kepri?

The Kepri uses LED technology, which does not require a warmup period prior to reaching full output.  It is ready to use as soon as it is turned on. 

Does the Kepri comply to any safety and EM regulations?

Yes, the Kepri contains a three-tiered sensor monitoring system along with complying with a variety of safety and EM regulations, including the stringent UL-8802 requirement.  Please see below:

CAN/CSA C22.2 No. 250.0-18_4th Ed.  UL 1598_4th ed.-2018       
Safety standard for L
UL 8802_Issue 4_August-2021

 

IEC 61010-1:2010/A1:2016           Safety requirements for electrical equipment for measurement, control, and laboratory use

EN 61010-1:2010/A1:2018            Safety requirements for electrical equipment for measurement, control, and laboratory use

IEC 62471:2006 (First Edition)      Photobiological Safety of Lamps and Lamp Systems

 

Can Excelitas conduct a Covid-19 disinfection test?

External partners conduct our entire microbiological tests. SARS-CoV-2, the virus that causes Covid-19, is pathogenic and can be inhaled; this requires a biohazard level 3 facility. Often surrogates (similar pathogens) are used to test the effectiveness of a device; these tests typically happen at biohazard 1 facilities. However, recent studies have shown the effectiveness of UVC in the mitigation of airborne and surface-bound pathogens, particularly SARS-CoV-2.  Refer to: UV Inactivation of SARS-CoV-2 across the UVC Spectrum: KrCl* Excimer, Mercury-Vapor, and Light-Emitting-Diode (LED) Sources (nih.gov) 

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