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DLX-N High Output, Dual UV-C Fixture Disinfects Moving Airstreams; Can Inactivate the SARS-CoV-2 Virus

The DLX-N™ high output NEMA-4 ultraviolet fixture from UV Resources efficiently and affordably inactivates pathogens – including the SARS-CoV-2 virus – on surfaces and in airstreams.

The dual, high-output UV-C fixture delivers the necessary germicidal dose to inactivate pathogens in virtually any airstream and its NEMA-4 outdoor rating makes installation possible on any exterior return, supply or exhaust duct.

The DLX-N™high output, dual lampultraviolet NEMA-4 fixture from UV Resources efficiently disinfects HVAC/R airstreams, cooling coils.
The DLX-N™high output, dual lampultraviolet NEMA-4 fixture from UV Resources efficiently disinfects HVAC/R airstreams, cooling coils.

The antimicrobial fixture can inactivate disease-causing agents, including the virus responsible for the COVID-19 pandemic.

Mitigate SARS-CoV-2 Virus Transmission

Research has shown the 254 nm germicidal wavelength can inactivate the genetic material in the SARS-CoV-2 virus.1 Moreover, when aerosolized, the COVID-19-causing virus is likely more susceptible to ultraviolet germicidal irradiation (UV-C or UVGI) damage than other coronaviruses such as SARS-CoV-1 (that led to the 2003 severe acute respiratory syndrome) or MERS-CoV (that caused the 2012 Middle East respiratory syndrome).2

The Centers for Disease Control and Prevention recommends UV-C among a handful of ventilation interventions to mitigate the spread of the SARS-CoV-2 virus. “Upper-room UVGI systems can be used to provide air cleaning within occupied spaces, and in-duct UVGI systems can help enhance air cleaning inside central ventilation systems.”3

Inactivate Airborne Pathogens

The new exterior-duct-mount dual lamp fixture doubles the germ-killing power of its SLX single lamp cousin designed to disinfect airstreams in return, supply or exhaust plenums or ducts. Lamps from both products are inserted into the duct “spear-style” through a 3/4-inch hole(s) so they protrude into the airstream. The fixture is installed and serviced outside the air handler, or duct, and offers facility managers and HVAC contractors a versatile means of inactivating airborne pathogens in hard-to-access areas.

Chemical and Ozone-Free Antimicrobial

Ultraviolet light scrambles the genetic material in pathogens—DNA in bacteria and fungi, RNA in viruses—so they cannot replicate. Viruses and bacteria cannot develop a resistance to germicidal UV because it uses electromagnetic energy to inactivate, rather than synthetic or hazardous chemical elements such as ozone.

The DLX-N fixture, which stands for Dual Lamp eXterior-mounted NEMA-4 fixture, gives facility managers and building owners additional benefits beyond airstream disinfection.

Like most germicidal fixtures installed near HVAC cooling coils, the DLX-N can improve heat transfer efficiency, reduce energy use and lower maintenance costs. With lamp sizes ranging from 12- to 31-inches, the DLX-N lamps provide 360-degrees of high UV-C intensity.

New/Retrofit Applications

Designed for a full range of new or retrofit infection prevention applications, the DLX-N can be easily installed indoors or outdoors in most light-commercial, commercial, industrial and healthcare HVAC systems, as well as return or supply duct runs.

DLX-N lamps come standard with the exclusive EncapsuLamp™ (FEP lamp coating) technology option, which protects installers, plenums and airstreams from lamp residues such as glass, should an accidental lamp-break occur. In addition, it provides insulation to lamps for temperature changes that can negatively affect lamp output and performance.

The DLX-N fixture features premium materials with heavy gauge powder coated steel, mounting and lid gaskets, as well as a waterproof, type 1 outdoor, rapid-start power supply and a CU2™ for lamp/ballast monitoring for BMS systems.

“Because of its high output and installation flexibility, the DLX-N can be used inside or out, which make s it especially popular with contractors working in hospitals and nursing homes, commercial offices, as well as food and pharmaceutical processing plants,” says Dan Jones, President of UV Resources, based in Santa Clarita, Calif. “Besides disinfecting airstreams, UV-C offers significant operational benefits, that include keeping HVAC coils, drain pans and other internal surfaces free of microbes, organic matter, dirt and grime —materials that produce odor, reduce airflow and limit cooling capacity.”

Product Summary

The DLX-N™ high output, dual lamp ultraviolet NEMA-4 fixture from UV Resources efficiently disinfects HVAC/R airstreams, cooling coils and drain pans halting infectious diseases such as the SARS-CoV-2 virus. UV lamps are inserted inside the duct “spear-style” through two 3/4-inch holes, while the fixture is installed and serviced from an exterior supply, return or exhaust plenum or duct. The new UV-C fixture offers facility managers and HVAC contractors a versatile means of inactivating airborne pathogens on almost any inside or outside duct.For more information, call 877.884.4822; or visit UVResources.com.

About UV Resources

UV Resources helps facility managers disinfect moving airstreams, interrupt the transmission of airborne infectious diseases, and kill microbial contaminants that impede HVAC efficiency. The founders of UV Resources pioneered the application of UV-C energy in HVAC equipment nearly 25 years ago. Today, the company operates a comprehensive manufacturing and distribution network to supply market-leading UV-C solutions around the world. For more information, call 877.884.4822; or visit UVResources.com.

EncapsuLamp™ and CU2™ are trademarks of UV Resources.


1 National Academies of Sciences, Engineering and Medicine. Does ultraviolet light kill the coronavirus? October 2020. Retrieved from https://sites.nationalacademies.org/BasedOnScience/covid-19-does-ultraviolet-light-kill-the-coronavirus/index.htm

2 Beggs CB, Avital EJ. 2020. Upper-room ultraviolet air disinfection might help to reduce COVID-19 transmission in buildings: a feasibility study. PeerJ 8:e10196 DOI 10.7717/peerj.10196 Retrieved from https://pubmed.ncbi.nlm.nih.gov/33083158/

3 CDC. COVID-19 Information for Community, Work and School; Ventilation in Buildings for Workplaces and Businesses (December 21, 2020). Retrieved from https://www.cdc.gov/coronavirus/2019-ncov/community/ventilation.html