Purge Virus = Safe and Cost-Effective Germicidal UV Light and HVAC Filter/ Coil Protocol Technologies for Air Disinfection

Ultraviolet and advanced Filter/Coil treatments have the potential to reduce the spread of COVID-19 and prevent future pandemics if successfully integrated into HVAC ducts and systems.

We source and develop a range of advanced germicidal UV light and other disinfectant solutions that work independently and cooperatively to address airborne pathogens.

Independence LED Lighting is pleased to serve as a Sales Channel partner for Purge Virus LLC (https://purgevirus.com). Purge Virus has developed the patent pending technology for ultraviolet (UV-C) solutions that utilize Germicidal UV Light, which disinfects the air in heating and cooling ducts at hospitals, schools, and other facilities. We have a licensing agreement with Purge Virus to produce the technology based on the intellectual property of Purge Virus for these devices.

We are also working with Purge Virus to attract the resources to expand on our R&D for COVID-19 LED Phototherapy which is another example of our initiative to help mitigate the spread of COVID-19 and future pandemics. Given the high volume of requests for Personal Protection Equipment (PPE) such as Nitrile Gloves, we are also pleased to provide a diverse range of Personal Protection Equipment (PPE), and the In-Stock PPE from Purge Virus is provided through their strategic partnership with PPE Source International, LLC.

Specialized Needs: Dentists cannot work with patients from home, and they have acute needs to disinfect indoor air in their operatory rooms to safely reopen. See the dental care solutions with Germicidal UVC Light. The devices are also appropriate for healthcare providers ranging from dermatologists to family doctors.

COVID-19 NEWS: April 20, 2020 – The New York Times, “In January, at a restaurant in Guangzhou, China, one diner infected with the novel coronavirus but not yet feeling sick appeared to have spread the disease to nine other people. One of the restaurant’s air-conditioners apparently blew the virus particles around the dining room.” Full article

In addition to our currently available HVAC sterilization technology, we are fast-tracking the launch of the free Purge Virus mobile app to help people quickly and easily identify restaurants, hotels, and other businesses that are proactively taking preventive measures to disinfect airborne pathogens. See the bottom of this page for previews of the app. To receive notification of the release Contact Us

Germicidal UV Light OVERVIEW:  To help prevent the future spread of viruses such as COVID-19 at restaurants, hospitals, schools, offices, and other commercial facilities, ultraviolet (UV) light has the proven capability to kill airborne pathogens. Purge Virus focuses on the integration of UV light into HVAC ducts to sterilize the air and create safer environments for Americans as well as people around the world. The market challenge to date has been the upfront expense of the equipment and the ongoing labor and equipment costs to maintain the systems. Ultraviolet C (UV-C) refers to ultraviolet light with wavelengths between 200 – 280 nanometers (nm). Light in the UV-C wavelength can be used for disinfecting water, sterilizing surfaces, destroying harmful micro-organisms in food products and in air. Purge Virus is developing a range of solutions that include UV-C LED Strip Kits for HVAC ducts to sanitize whole buildings continuously and concurrently with air handling systems. We also offer germicidal UV light devices that are AVAILABLE TODAY (see below) and other technologies for air disinfection that are available upon request. Purge Virus is pleased to help facilities create safe indoor air environments.


germicidal UV light

WHY HVAC DUCT INTEGRATION?: Given than UV-C is harmful to humans with direct exposure, UV-C has been used, to date, in devices that are often carried or rolled into rooms to sterilize the air or surfaces after humans have left the area. Heating, Ventilation, and Air Conditioning (HVAC) ducts are ubiquitous in many different form factors across commercial and residential buildings around the world. HVAC ducts serve as an excellent means to sterilize air using UV-C if the technology is cost-effectively mounted inside the ducts. HVAC ducts are also ideal, because most buildings require multiple air changes per hour according to building code standards. Typical HVAC design includes a “trunk” duct that has multiple “branches” to supply air to individual rooms. This Germicidal UV Light System is intended for installation within the respective trunk ducts. With the current status quo, if an infected person coughs in one room, the contaminated air is drawn out to the room and distributed to multiple other rooms that are supplied by the same trunk duct. With this invention, the contaminated air is sterilized before it is supplied back to the source room and the associated room on that section of the trunk duct. For this Germicidal UV Light System to be effective across a whole facility, design considerations are required to place the technology in the right places on a case-by-case basis.

germicidal UV light

A “NEW NORMAL”: Countries around the world face pandemics with costly economic implications, the cost of healthcare has increased, and buildings without operable exterior windows escalate concerns over sick building syndrome. The investment into this technology may become a “new normal” where building codes start to require some form of HVAC air sterilization to mitigate infections, just as many building codes require smoke detectors and sprinkler systems to mitigate fire damage. The labor cost of integrating this technology into the ducts in advance of construction will be less expense than the retrofit cost of installation. This Germicidal UV Light System may also have a positive economic impact through the creation of new manufacturing and installation jobs in this healthy building category.

CHALLENGES: The challenges to date for UV-C HVAC duct implementations include the high cost of UV-C hardware, installation, and maintenance as well as the costly impact on air flow requirements for HVAC systems. Germicidal fluorescent tubes, produced to achieve the adequate sterilization, typically have a life span of less than 10,000 hours. Given 8,760 hours in each year, changing the lights approximately every year for facilities like hospitals and hotels that run 24 hours per day, is often cost prohibitive, especially when the lights are hard to easily access inside of HVAC duct systems. Fluorescent tubes are typically ¾” to 1” in diameter, and for this type of sterilization they have been be mounted in pilot projects at the interior of ducts parallel to the air flow. The size of the fluorescent tubes creates resistance and increases the static pressure, in some cases by 20%. The resulting slower speed of the air moving through the ducts changes the effectiveness of the HVAC air handlers relative to the original design at any given property. The change in the air flow can create costly alterations or upgrades to the HVAC system. This image below is of the UV-C Strip Kit, which is a low profile solution to maximize sterilization while minimizing the impact on air flow.

germicidal UV light


Light-emitting diode (LED) technology presents a solution to reduce the maintenance challenge, because LEDs typically last significantly longer than fluorescent tubes. The longevity of LEDs also increases as market demand pushes manufacturers to compete and improve the performance of efficacy and longevity.

LOW PROFILE – Germicidal UV Light SOLUTION 2:

LEDs can be configured to reduce the adverse impact of air flow from tubes. If LEDs were included on tubes mounted inside of ducts, they would create similar challenges as fluorescent tubes relative to the static pressure that slows the air flow. A typical 48” long fluorescent or LED tube has a typical diameter of ¾” and a radius of .375”. The cross section surface area is πR²: 3.14 x  .375² = .44 square inches.  This Germicidal UV Light System addresses the air flow, by eliminating the need for a “tube” and dramatically reducing the size of the UV-C hardware. The PATENT PENDING solution is to mount the LED UV-C diodes on a printed circuit board that is approximately 1/4” wide by approximately 1/8” thick in varying lengths most likely 48” for production and shipping logistical convenience. See Figure 1 and 2. The cross section is about .25” x .125” = .03125”. This is a dramatically smaller profile than the tubes, and it is a 92.8% reduction in the surface area that slows the air flow in HVAC ducts. If fluorescent or LED tubes impact the air flow by 20%, this LED strip solution would only impact the air flow by 1.4%.

Germicidal UV Light Figure 1: Cross Section of UV-C LED Strip Kit (avg 1/4” wide)

Germicidal UV Light Figure 2: Elevation of UV-C LED Strip Kit (avg 48” long) shown here with LED Driver and terminal mounted on printed circuit board (PCB). Note that this system also runs with optional remote, low-voltage, power hub driver(s) to reduce the need for drivers powering each individual strip kit or pair of kits.

germicidal UV light

Germicidal UV Light SOLUTION 3: LEDs typically need some form of a heat sink to transfer the heat away from the diodes to foster longevity. This Germicidal UV Light System uses conductive aluminum for the printed circuit board as well as a conductive magnet backing to increase the speed of the installation. Many LED printed circuit boards for linear modules are made of FR4, fiberglass-reinforced epoxy-laminates, given that it is less expensive than aluminum. The disadvantage of FR4 is that it is less conductive than aluminum. Most HVAC ducts are made of galvanized sheet metal to prevent rust and corrosion. Galvanized steel is covered with a thin layer of zinc, and this process does not interfere with the magnetic strength of the steel. For this Germicidal UV Light System adhesives can be used as well as mounting support from self-taping screws, but the advantage of a magnet backing is that it helps to evenly transfer the heat from the diodes through the printed circuit board out of the ducts along the length of the printed circuit board.


Air moves at different speeds within different HVAC systems, the size of ducts vary from building to building, and the size of ducts vary within buildings.  Given these variables, the number of diodes on the UV-C strips may vary as may the size of the printed circuit board and the length of the UV-C LED strips.  The placement of the UV-C strips within the ducts will most certainly vary based on the needs of the facility. This Germicidal UV Light System is modular to adapt to the different needs at any given location. See Figures 3 through 5 for sample configurations. The power supplies may also vary based on the building, and this technology will work with LED drivers powering each LED strip “kit” as well as configurations of more than one strip, or remote low voltage power hub drivers. We have worked with Nextek Power Systems on multiple project over multiple years, and their PhD is our recommended power supply and controller for the Germicidal UV Light System. The PhD helps reduce installation cost. The status quo of wiring via Alternating Current (AC) to each LED Driver requires a licensed electrician to run either conduit or armored cable and make multiple junction box connections. By contact, with the PhD, the AC powers the unit, and the Low Voltage Direct Current (LVDC) Class 2 wiring runs to each UV-C Strip Kit without the need for junction boxes or individual drivers at each strip.

Germicidal UV Light Figure 3: Elevation of UV-C “Purge Zone” within HVAC Duct (avg 12’ to 16’ long) shown here with 4 pairs of UV-C LED Strip Kits. Contaminated air enters on the left (black arrow) and the sanitized air leaves the zone on the right (white arrow)

germicidal uv light

Germicidal UV Light Figure set 4/5: Cross Section of UV-C “Purge Zone” in HVAC Duct (multiple sizes) shown here to illustrate the UV-C Strip Kits filling the Purge Zone with germicidal light. This system is designed for all of the UV-C Strip Kits to run concurrently. These figures illustrate power supply setups with the LED drivers on the outside of the ducts, where each one powers two strips per driver.  Where appropriate, we alternatively recommend using a remote power hub driver to streamline the installation and operation.

germicidal uv light


This Germicidal UV Light System will also work with energy saving measures such as relays or wiring connections that activate the LEDs to turn on when the fans for the air flow are running.  One of the reasons that we recommend the Nextek Power Systems Power hub Driver (PhD) is that it includes the controls to synchronize the UV-C Strip Kits to run when the air handling units are running as well as shut off, upon the direction of property management in the evening or on weekends, when certain facilities like schools and offices are often unoccupied. This is more cost effective than having controls on each of the more traditional individual LED Drivers. Think of the PhD as the “brain” that powers and controls the UV-C lighting.


We have been manufacturing the LED strip kits for multiple years. See the Spec Sheets for building illumination. With the Coronavirus COVID-19 crisis, now is the time to start preparing for the post-pandemic recovery and set systems in motion to mitigate air borne pathogens and future pandemics.  The integration of UV-C Germicidal LEDs into HVAC Ducts is a key spoke on the wheel of solutions. To learn more Contact Us.

Charlie Szoradi – CEO, Independence LED Lighting  610-551-5224   Charlie@IndependenceLED.com


BACKGROUND: Purge Virus is a collaboration started by two Pennsylvania companies that each bring expertise to solve the pressing issue of life safety in a pandemic landscape, following the outbreak of COVID-19. The key for the R&D is to determine the most appropriate form factor and the UV density levels needed to secure virus free environments based on different type of air handling and duct systems. Successful deployments will involve a combination of HVAC air flow and analytics services at each location as well as the UV hardware and software to monitor air quality and the impact of germicidal UV light.

germicidal uv light

Independence LED Lighting (https://independenceled.com/) is a leading US manufacturer of light-emitting diode (LED) technology with ten years of experience in producing the industry leading 10 year warranty technology. Independence will adapt and scale its proven linear module system to incorporate germicidal UV light diodes and reduce costs for facility owners and managers relative to other technology that is currently on the market.

OptikW (https://energyintelligencecenter.com/optikw/) is the software platform of the Energy Intelligence Center, which specializes in HVAC system optimization. The OptikW team will play a key role in the design process as well as the ongoing services and training of installation channel partners for each implementation of the germicidal UV light systems. Since OptikW provides performance-based energy savings on HVAC systems, property owners and managers can choose to bundle solutions with $0 or low upfront cost options to benefit from energy savings and safety.

Purge Virus (https://purgevirus.com/) is the “One-Stop-Shop” for disinfection across a diverse range of properties and personal protection equipment in the US and around the world.

AVAILABLE NOW: Germicidal UVC Lights

To learn more about these and other germicidal technology, beyond the information on this page see: 

We are fast-tracking the development of our custom LED strip system and also offering the currently available technology highlighted below. The devices are produced through our strategic distribution relationship with a seasoned US manufacturer, that has multiple decades of proven production and implementation results from these devices. For commercial and industrial properties, we offer three primary use case applications for deployment independently or in conjunction with each other:

#1: Germicidal UV Light in HVAC Ducts

#2: Germicidal UV Light at Coils and Pans

#3: Germicidal UV Light with Wall Mounting

HVAC DUCT DISINFECTION with Germicidal UV Light: For HVAC Duct pass-by air disinfection, the multi-module arrays increase the density of UVC light in critical runs of ducts for commercial or industrial applications. Following an easy installation process, reduction rates of bacteria, viruses, fungi and other contaminants can be over 99 percent, depending on the microbe, with most applications to date documenting well over 90 percent. The currently available standard size technology is sized at 16”, 24”, 33”, and 45”, and we offer the assemblies in either two (2) or four (4) module configurations. The longer the straight run of a trunk duct the better. As an example, for 10’ length ducts, we recommend placing the assembly at the center point, so that the UV light irradiates pathogens 5’ to either side creating a 10’ “Purge Zone”. Each module is cylindrical at just 5/8” diameter to keep static pressure loss on air flow to a minimum.

COIL & PAN DISINFECTION with Germicidal UV Light: The coil is the heat exchange (heating) or (cooling) coil of the HVAC system, the heating and cooling of the coil creates condensation, which collects in the drain or drip pan. The coil and drain pan treatment works by directly irradiating the surfaces of the coil and drain pan with UVC light. Due to blow off that can occur from dirty coils, it is incredibly important to use a moisture proof fixture in the retrofit. These ready to install framed structures can be easily mounted on coils, to provide the desired air stream and on-coil disinfection to protect personnel from unwanted bacteria, mold, viruses or fungi travelling in the air stream. These devices can be mounted easily to plenum walls, or to frame assemblies that span supply ducts and/or cooling coils. Five different standard widths include 18”, 24”, 36”, 48”, and 60.”  Frames can be mounted side by side or stacked vertically to cover the entire plenum or coil.

WALL MOUNT DISINFECTION with Germicidal UV Light The Wall Mount in-room devices can acutely treat vulnerable or high traffic rooms, such as healthcare waiting rooms, and they are also well suited for K-12 and university classrooms. For this solution, the self-contained and louvered “shoe box” device is mounted on the wall approximately 7’ from the floor. The natural conductive flow of air in the room circulates the sanitized air, from the existing HVAC system as well as the opening and closing of doors and human movement. The UVC devices come in three sizes that are increasingly larger relative to the respective coverage area. For each coverage area, the dimensions are listed here by Width x Height x Depth. Please note that multiple devices can be used in rooms or areas larger than 300 sq ft. 300 sq ft coverage (37.5” x 5.2” x 6.6”); 200 sq ft (27.7” x 5.2” x 6.6”); 100 sq ft (10.8” x 9.2” x 9.1”). Plus, corner devises are also available.


If you are considering a germicidal UV light system with duct and/or coil applications vs the in-room wall mounted devices, it is most beneficial to combine the HVAC Duct with the Coil & Pan devices, for maximum disinfection. This approach provides intensive ultraviolet treatment with the added advantage of maintaining the performance of the coil and drain pan system for added longevity.  The HVAC Duct devices can easily go anywhere in the ducts, while the Coil & Pan treatments typically need more planning for retrofits based on certain space confinements. Since the Wall Mount in-room devices can acutely treat vulnerable or high traffic rooms, such as healthcare waiting rooms, at quicker rates, consider a “Triple-Purge-Virus” approach. All of the solutions have similar overall results reducing airborne contaminants by over 99 percent, depending on the microbes.

FIVE PAGE OVERVIEW: Download – Note that this file is in PPT format and editable for Sales Channel Representatives to add their contact information.

CONTACT US: Given the increased volume of calls and emails regarding this technology line, during the ongoing COVID-19 pandemic, please take a few minutes to include key information on the PURGE VIRUS DATA SHEET to help expedite the response. The file is also available as a PDF Data Sheet for quick mobile phone access. Please email it to us for follow up on Product Details, Pricing, and Customer Testimonials: Contact Us.

germicidal UV light

Since the second half of the 20th century, our US production partner has manufactured more than 50,000 germicidal UV light devices. Customers are consistently satisfied with the American Made technology, and more testimonials like this one are available upon request,

“We have installed three custom units for our air handlers and have two more ready to install. I will be releasing an order for the next ten shortly.”

The client list is extensive, and here are just a few examples of major accounts:

Institutions: Infectious Disease Research Institute

Healthcare: New York State Department of Health, Albert Einstein Medical Center, Burbank Hospital, Children′s Hospital Medical Center of Boston, Methodist Healthcare of San Antonio

Food/Beverage: Safeway Stores, Anheuser-Busch, Campbell Soup, Coca-Cola, Pepsi Cola, Del Monte, Dr. Pepper/7-Up, General Foods, Gerber Products, Guinness, Heinz, Hershey’s, Kraft, M&M/Mars, Minute Maid, Ralston Purina, Pepperidge Farms

Education: Princeton University, Cornell University, Johns Hopkins University, Ohio State University

Pharma: Merck, Bristol-Myers Squibb, Eli Lilly

US Government: US Army, Air Force and Naval Hospitals, US Veterans Administration Hospitals, US Department of Agriculture, US Food & Drug Administration

Other customers you may recognize: IBM, 3-M, Dupont, Union Carbide, Proctor & Gamble

COVID-19 Disinfectant

HVAC – Solutions Beyond Ultraviolet – CLEAN FILTERS and COILS

One of our strategic partners provides advanced DISINFECTION at Filters and Coils, as well as Air Handlers, Fan Coils, Ceiling Units and Packaged Terminal Air Conditioners (PTACS). Their COVID-19 Disinfection Protocol includes technicians that treat filters with a powerful disinfectant that provides a thin film, ensuring that any microbes that are captured in the filters are actually killed. The same process is applied to the coils with a complete enzyme treatment in order to remove biofilm formations, followed with a thick Chlorine Dioxide foam injected into the coils that ensures disinfection. The patented process delivers near-perfect surface area coverage of any type of heat transfer coil. This protocol also saves energy and there is no disruption to the system or the building’s occupants. This one of the weapons to fight COVID-19, and we welcome the opportunity to share more details: Contact Us

Germicidal UV Light RESEARCH

Ultraviolet lights were shown to KILL MOLD, VIRUSES and BACTERIA more than 100 years ago. In 1903, Niels Finsen was given the Noble Prize in Medicine for using UV to effectively treat patients with skin infections.

Today, UV lights are used for germicidal use in hospitals, restaurants and grocery stores. Germicidal UV light has been shown effective in killing sterilizing an HVAC system. Here are two examples:

1). Germicidal UV light study: In 2012, a study at Duke University Medical Center showed that UV lights killed 97% of bacteria that were resistant to antibiotics, the so-called superbug bacteria that are the toughest to kill.

2). Germicidal UV light study: The Journal of Applied and Environmental Biology reported in 2001 that germicidal UV radiation significantly reduces airborne fungi in air handling units.

More Germicidal UV Light RESEARCH – See:UV Light Disinfection


Ultraviolet LEDs prove effective in eliminating coronavirus from surfaces and, potentially, air and water

Date: April 14, 2020   Source: University of California – Santa Barbara.  As COVID-19 continues to ravage global populations, the world is singularly focused on finding ways to battle the novel coronavirus. “One major application is in medical situations — the disinfection of personal protective equipment, surfaces, floors, within the HVAC systems, et cetera,” said materials doctoral researcher Christian Zollner, whose work centers on advancing deep ultraviolet light LED technology for sanitation and purification purposes. Full Article in SCIENCE DAILY