Product Description: VidaShield is continuous UV-C air purification system designed as a light fixture. Ultraviolet lights are used throughout healthcare and other facilities to neutralize microorganisms on surfaces, in water and air. Unlike other devices, the VidaShield system may be operated in occupied rooms allowing for 24 hour per day shielded ultraviolet germicidal irradiation (UVGI). This patented device draws room air in through an array of fans and filters to an unseen UV-C radiation chamber mounted above a traditional two by four light fixture and then returns treated air back to the room.
Differential Pressure: The fan array in the VidaShield creates differential pressure to draw an average of 50 cubic feet per minute through the system. VidaShield does not affect the existing HVAC operation in the room. It simply recirculates air within a space, having no impact on positive or negative room pressure. For optimum efficiency, the VidaShield unit shouldn’t be placed too closely to the outtake vent of the HVAC system. Ideally it should be 2-3 feet away.
Cycle Times: VidaShield works 24/7, regardless of the size of the room, constantly circulating the air. Because the fans move the air at 50 cubic feet per minute (cfm), a 10’ x 10’ room with an 8-foot ceiling would equate to 4 air changes per hour (i.e., 800 cf. of air every 16 minutes). This equation holds for larger rooms, so a 10’ X 15’ room with the same ceiling height of 8 feet (i.e., 1,200 cf.) will take 24 minutes instead of 16.
Suitable Applications: VidaShield is suitable for healthcare facilities or other locations where cleaner air is desired, such as: hospitals, urgent care centers, outpatient surgery centers, physicians’ offices, dental clinics, plastic surgery centers, long-term care facilities, cancer centers, dialysis centers, daycare centers, schools, prisons, food processing plants, animal research facilities, commercial buildings, airport isolation rooms, border quarantine stations, and compounding pharmacies.
Airborne Pathogens: Pathogens may become aerosolized a number of ways, including coughing, sneezing, or shaking the bed linens. A number of medical procedures are prone to generate aerosols. Most airborne microorganisms eventually settle on surfaces, creating the possibility of touch transmission. Paul Baron’s, Division of Applied Technology, NIOSH, CDC, “Generation and Behavior of Airborne Particles (Aerosols)” presentation lists the settling time for particles by various unit density spheres. Most infection causing bacteria and viruses take between 1.5 to +41 hours to settle five feet in still air. Any fan driven HVAC system circulates air like stirring a beverage; circulation keeps pathogens airborne, increasing settling times. Re-suspension of surface microorganisms may occur through activity, such as walking or surface cleaning.
Grille Angles: VidaShield draws the circulating air into the radiation chamber to neutralize the pathogens. The fixture has intake and exhaust vents with grilles set at a 30-degree angle, to pull the air in and push it out in a pattern that avoids recirculating the same air repeatedly.
HVAC Comparison: Due to the very high volume and velocity of air in most commercial HVAC systems (e.g., 400 to 1,000 cfm), it is often economically impractical, if not physically impossible, to design UV systems in air handlers to treat the air-stream and produce very high elimination rates against airborne bacteria and fungi. As such, UV in air handlers is generally not an effective method for eliminating microorganisms shed by infectious patients or from environmental reservoirs that are in commercial building air streams. Most contamination of the air handler system occurs in and around the coil and drain pans. Organic contaminants grow and spread from there through the ductwork and into occupied spaces. Properly installed UV light systems, along with a strict filter change regimen, reduce the potential of growth occurring in the air handler.
HEPA Filtration Comparison: HEPA filters are used in conjunction with the HVAC system; therefore, to be effective the air must pass through the filter, either through the supply or return ductwork. Filtration is one of the four hierarchies of defense recommended by the CDC. Bacteria and fungi are introduced to a space in two primary ways: 1) through outside air, or 2) by humans shedding microorganisms through breathing and contact. VidaShield treats the air within the space and is independent of the HVAC system; therefore, can neutralize these microorganisms before they enter the air filtration system, in addition to reducing the number that escape the filtration system.
Surface Recontamination from the Air: Surface cleaning is an excellent tool in the infection preventionist’s arsenal. However, according to a 2012 study by the University of Leeds, coughing, sneezing or simply shaking the bedclothes can send superbugs into flight, allowing them to contaminate recently cleaned surfaces. VidaShield treats the air and reduces bacteria and fungi from treated air at room level, thereby reducing the bacteria and fungi that settle on surfaces from treated air. In the FAQ section of the Clorox® website, dealing with its no-touch portable UV device (Clorox Healthcare Optimum-UV System), the following question is asked and answered, “How long does the reduction in pathogens last? As with any surface bioburden reduction technique, the log reduction on the treated surface will be at its maximum at the completion of the cleaning process. Soon after, surfaces will begin to become re-contaminated with microorganisms that may be transported by air currents or through healthcare worker or patient touches.”
Installation: VidaShield replaces 2’ x 4’ fluorescent fixtures, with any of its three room light options: fluorescent or LED tubes, LED panel, or no-down light (i.e., matching ceiling tile in lieu of room light). For 24-hour operation of the radiation chamber, a second circuit, independent of the room light switch, should be run from the nearest junction box.
Maintenance: In hospitals and nursing homes that are 24/7 operations, it is recommended that you change the MERV 6 filter quarterly. The lumen output on the UV lamp will start to diminish after approximately 9000 hours (375 days) so it is recommend that you change the UV lamp once per year to maintain maximum efficacy on the unit.
MERV 6 Filter: The MERV 6 filter (Minimum Efficiency Reporting Value) is a high airflow filter and is designed to trap dust and large air particulates, not spores, bacteria or viruses. The VidaShield fixture uses a MERV 6 filter to capture dust ahead of the radiation chamber. The dust-free air maintains the efficiency and intensity of the radiation lamp. The MERV 6 filters dust but allows most microorganisms to pass through to the UV-C chamber to be neutralized.
Filter Disposal: Most microorganisms like bacteria and viruses have much smaller micron sizes and flow through the filter. There is always the possibility that some of these pathogens may cling to the filter material. This filter should be disposed of with the same protocol that facilities use for disposal of any other high airflow filter currently in use. This filter is similar to the filters that are currently used in the HVAC system.
UV-C Lamp: The ultraviolet lamp produces 15 Watts of High Output UV-C energy at a wavelength of 253.7 nanometers, the ideal wavelength to kill microorganisms by inactivating their DNA. Microorganisms are neutralized based on the time and intensity of exposure to UV-C radiation. VidaShield generates a UV-C dose of 198 J/m2.
Energy Usage: The VidaShield VS01 comes standard in a two lamp fluorescent configuration, and consumes 44 watts. The UV chamber and fans consume 52 watts. Total system wattage is about 97 watts for the VidaShield VS01. By comparison, a standard four lamp T8 fluorescent lighting fixture consumes around 114 watts. The VidaShield VS02 (LED version) uses about 125 watts but generates over 7,200 lumens.
Kelvin Temperature: The standard Kelvin temperature for the VidaShield VS01 and VidaShield VS02 is 4100K. Custom orders are available for both models of either 3500K or 5000K. TheVidaShield VS03 has no room light. The UV lamp is not designed as a lumen-producing lamp and is not visible during operation.
Decibels: The fans are rated at 30 decibels, which is the World Health Organization (WHO) recommended decibel level for hospitals. However, the fans are above the ceiling line and enclosed within the system, behind a door frame and filter. The realized decibel level in the space would be less than the 30-decibel rating of the fans. The WHO recommends that average patient room noise levels remain around 30 decibels. According to Medscape Medical News, the recommended maximum noise level is 40 decibels. A recent study found the average sound level at hospitals to be 48 decibels.
Material Safety Data Sheets: Primary focus is to help businesses of all sizes improve the management of chemical products. A material safety data sheet is a required document that contains information for the safe handling, use, storage and disposal of potentially hazardous chemicals. Global agencies like the UN, OSHA, EPA, EU and Health Canada, require that all potentially hazardous chemicals have information on file to ensure the safety of all personnel that are involved in manufacturing, distributing, transporting and using these materials in their day-to-day operations. According to OSHA CFR 1910.1200 (better known in EH&S circles as the Hazard Communication Standard or HCS), manufacturers and distributors are required to deliver a safety data sheet to each buyer of these materials. In turn, buyers, or employers, are required to make this information readily accessible to their employees who may come in contact with chemicals in the workplace. VidaShield does not utilize chemicals of any kind in the manufacture or use of the VidaShield. A Material Safety Data Sheet is not required for this product and does not apply in any way.
Fluorescent Lamps: The fluorescent lamps are 36 inches in length. The UV lamp is 22.36 inches from end of lamp to end of pins, and 22.047 inches from end of lamp to end of mounting base in length. Like every other fluorescent lamp, it contains a very small quantity of mercury. States that require fluorescent lamps to be disposed of as hazardous material typically state that quantities of less than 20 lamps may be disposed of normally. With a bulk disposal of 20 or more lamps, procedures are established on a state-by-state basis as to the proper method of disposal. Hospitals that currently use fluorescent lamps, as a means of illumination, will already have protocols in place for lamp disposal provided their state has these requirements. These procedures would also apply to the disposal of the fluorescent and UV lamps removed from the VidaShield fixture.
Power Options: The entire system is universal voltage and can operate on line voltage ranging from 120-277 volts. The fixture can be operated from a single power source that currently operates the existing lighting system. However, to achieve 24/7 operation of the UV system it is recommended that a separate power input be connected to the UV input. We recommend the VidaShield system be always powered to operate 24/7.
Electrical Requirements: The lamps combined consume less than 100 watts. The low voltage system, which includes the low voltage converter, fans, photocell and failure indicator lamp consume less than 10 watts. The system will never consume all of these watts at the same time (e.g., when the failure indicator lamp is lit, there has been a system failure on either the UV lamp or the UV ballast).
120-277 V – Amp draw is dependent upon voltage.
· At 120 Volts the entire system will draw .917 amps
· At 277 Volts the entire system will draw .397 amps
Foot Candles: Foot-candle output of the fixture is dependent upon numerous factors: ceiling height, wall reflectance, ceiling reflectance, floor reflectance, furnishings, obstructions, and spacing ratio of fixture installation. Foot-candles cannot be determined; however, the fluorescent portion of the VidaShield is fitted with high efficiency Micro Matte reflectors to maximize light distribution and fixture efficiency. The base fixture efficiency is 82%.
Listing: All versions of VidaShield are ETL listed. VidaShield has been tested and certified under UL507, UL1598 and UL8750.
Patent & EPA Certification: American Green Technology is the exclusive manufacturer of theVidaShield and is an EPA registered company. EPA Establishment No. 092165-MS-001. This product is protected by US Patent Numbers: 8,350,228; 7,922,351; and 8,439,517 as well as, protected by the corresponding foreign protection.
Warranty: VidaShield has a 5-Year limited warranty, with the following terms:
· Warranted for a full year; UV lamp
· Warranted for two years; low voltage converter and fluorescent lamps
· Warranted for five years; fixture construction, including ballasts, photocell, fans and failure indicator lamp.