UV-C CABINET! This cabinet is not certified by any regulatory body and use must beapproved by national, regional or facility authorities, according to the local
context. No warranties are implied and workflows are used at your own risk.

N95DECON UV-CTECHNICALREPORTUV-C BASICS

UV-C CABINETDESIGN
PRINCIPLESHEALTH & SAFETY GUIDELINES

1 UV-C inactivates pathogens byaltering DNA and RNA

1

AVOID UV-C EXPOSURE

2

AVOID OZONE3WEAR PPE

Exposure to UV-C can cause
damage to skin & eyes.
Confirm doors are closed andsealed. Utilize interlocks toprevent doors openings during
cycle

2 Wavelength for antimicrobialactivity (254nm)

3 Surface decontamination withUV-C common in healthcare
settings - to kill C. Diff, MRSA,VRE and Ebola

SARS-CoV-2 & similar viruseson N95 & surgical mask material

DECONTAMINATION PRINCIPLES
Preserve mask* fit & filtration

Avoid self-contamination andexposure of UV-C to eyes andskin by wearing the right PPE(gown, gloves, eye protection,surgical mask)

2 Reduce bioburden (3-logreduction in SARS-CoV-2 fordecontamination)

3 Avoid harmful residues$~10 MINSPER CYCLE**~5,000

MASKS/ DAY* Mask denotes an N95 respirator. Surgical masks
may be substituted but supporting evidence issparse or unpublished= dependent on bulb irradiance to ensure<$1,500 ** Cycle time
2PER CABINET

1MEASURE DOSE
ROUTINELY
With photodiode orphotochromic strips thatare specific to UV-C andcan measure >1 J/cm22

IRRADIATE BOTH SIDES

3IRRADIATE UNIFORMLY

Avoid using bulbs intended toproduce ozone. Keep cabinet
doors closed to prevent escapeof ozone (UV-C light will
breakdown ozone withincabinet)

4 At least 1J/cm2 to inactivate

1DESIGN PRINCIPLES FOR
CORRECT DOSE APPLICATION≥1J/cm dose is applied to masks

N95
RESPIRATORMINIMALGERMICIDAL
UV-B(280-320NM)NOTGERMICIDAL
UV-B(320-380NM)

AVOID SHADOWING

5SECONDARY STRAPDECONTAMINATIONCITATIONS:● https://www.n95decon.org/uvc● https://www.covidppeguide.com/uvc-decon● Image adapted from ‘http://www.tecnowattsnc.com/eng/egermlamp.htm’

100
NM

200
NM

254 NM

300NM400NM

UV-C LAMP PEAK (DNA, RNA max uv absorption at 260 nm)

720
NM

Avoid shadowing fromother masks, straps, or
any objects betweenbulbs and mask

SURGICAL
MASK

N95 respirators can be decontaminated in the UV-C cabinet and requireat least 1J/cm2 UV-C irradiation. This method may possibly be used for
surgical masks, however data on surgical mask decontamination via
UV-C and impact on surgical mask performance are sparse - resultson bioburden reduction are preliminary, internal, and unpublished as of12/1/20. Confirm surfaces are hydrophobic with water drop test prior todecontamination.

VISIBLE(380-720NM)

Distance between bulbs= distance from bulb tomask, to apply >1J/cm2 toall surfaces

4

DECONTAMINATION WAVELENGTHSOZONE GENERATING UV GERMICIDAL UV-C
(100-220NM)(200-280NM)

Bulb array facing front& back of masks. Insideof cabinet lined withreflective material

Ultraviolet Disinfection Guidance Manual for the Final Long Term 2
Enhanced Surface Water Treatment Rule (2006)● Kowalski, W. (2010). Ultraviolet germicidal irradiation handbook: UVGI for
air and surface disinfection. Springer science & business media

Straps are resistant toUV-C decontaminationand must be wiped withcompatible disinfectantsolution. Do not wipe
facepiece.