Hospitals have been on the leading edge of disinfection for decades as they have worked to overcome the challenges of Healthcare Acquired Infections. Many of the technologies profiled on this website are already in hospitals across the US.
In addition to disinfection needs at hospitals, dental centers, and other doctors offices, germicidal technology will become key for the increasing number of urgent-care centers, retail clinics and privately run emergency rooms. Many of these types of facilities are located in shopping malls and strip retail centers across the US. To date they may not have had the budgets to implement comprehensive germicidal protocols for airborne pathogens. Given their relatively small size in comparison to major hospitals, these types of facilities are excellent candidates for HVAC and In Room disinfection technology. They also typically have one or two entrances so they can effectively control the germicidal boundary.
For air disinfection, healthcare facilities often warrant the combination of ultraviolet systems HVAC In Duct and Coil & Pan. Plus, In Room devices where appropriate for the acute needs. The acute need areas may include:
For device options to consider see the TECHNOLOGIES page.
For surface disinfection, ceiling fixtures work well to reduce the time needed to wipe down surfaces.
Surface cleaning with UVC requires clearing the room of occupants during the disinfection for about 10 minutes.
Combination Wall & Ceiling Mount Devices: Surgical Operating Rooms have set the precedent for disinfection. Some Dentists and Doctors are following the lead and using ceiling mounted fixtures in conjunction with the wall mounted devices to enhance disinfection of surfaces in addition to cleaning the air. Since the ceiling mounted fixtures require clearing the room of occupants and setting a timer for about 10 minutes, the application is only appropriate for rooms that have a door to prevent people from entering during the ceiling fixture surface disinfection.
Since the second half of the 20th century, one of our US production partners 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:
Market Traction to Date:
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, Air Force and Naval Hospitals, US Veterans Administration Hospitals, as well as the Infectious Disease Research Institute
Pharma: Merck, Bristol-Myers Squibb, Eli Lilly
SAMPLE HOSPITAL SOLUTION
Hospitals increasingly seek clean disinfected air, and one of the most cost-effective solutions is integrating an array of linear Ultraviolet-C (UVC) lamps to both clean the Coil and clean the Air on the Duct supply side. The sample solution below is for a large size Air Handling Unit (AHU) with the Coil, Plenum, primary Duct, and air flow illustrated in the figures.
Status Quo System: (Pathogens pass through the Coil into the Plenum and Ducts.)
Elevation of Coil (left) Cross Section of Plenum (right) feeding into Ducts
Upgraded System with (24) high power UVC lamps installed downstream from the Coil (This cleans the COIL for energy savings and cleans the AIR by maximizing pathogen irradiation in the DUCTS.)
This example above is for a property with multiple air handling units. This particular AHU-1 has three rows of two coils that are each 8’ wide x 3.5’ tall. The six coils are stacked three high in the plenum that is 16’ wide x 11.5’ tall. The CFM is 73,600 and the approximate square footage of the conditioned area for this ACH-1 is 60,000 SF.
Coil + Air Disinfection UVC System:
The PV-AUV-CK Series is a modular system (like an Erector Set – known perhaps to many of you who grew up before online games). The modular system is assembled on-site and includes the following:
(3) PV-AUV-CK-8 – $4,200 (Electrical Enclosures with 8 ballasts @ $1,400 each)
(24) PV-AUV-GSL-48 lamps – $3,480 ($145 each)
(24) 30 ft lamp cables – $1,800 ($75 each with SureSeal connections)
(48) lamp clamps – $480 (2 per lamp @ $10 each)
(2) switches – $170 ($85 each)
(2) warning signs $20 ($10 each)
Equipment Cost: $10,150
Highlights: For this air handler each of the (24) UVC lamps are 48” linear “tube” modules. Given the 73,600 CFM and the plenum size of (16′ x 11.5′ = 184 SF), the air velocity is 400 feet per minute in the plenum (73,600 CFM / 184 SF).
24 lamps effectively clean the coil and provide the adequate dose of ultraviolet irradiation to also clean the air. Dose is based on time, intensity, and distance. Each of the (24) 48″ high powered UVC lamps is 119 watts, for a total of 2,856 watts. The resulting dosage is 88,250 μW·s/cm2 (micro-Watt seconds per square centimeter), which is also expressed as microjoules per square centimeter or 88.25 joules per square centimeter. The key with this system is to set the lamps on the downstream supply side far enough away from the coils so that they can clean the air on both sides of the lamps. The ideal distance from the coil is 18″ (in this case with the plenum length of 6′ along the path of air flow). The longer the pass through “purge zone” the better, since the air is moving fast, and time is a factor of dosage.
Equipment + Installation Costs: The cost of the equipment $10,150 / 60,000 SF of conditioned space = $0.17 per SF. Installation labor for a system this size could involve two technicians for two days, including commissioning, measurement and verification. Adding an allowance of about $4,000 for installation brings the installed cost to about $14,000 / 60,000 SF = $.023 / SF.
Annual Electricity Costs: For a 24/7 facility, 2,856 watts / 1,000 x 8,760 annual hours = 25,018kWh. At the US average of $0.11/kWh, the annual operating cost = $2,752. With 60,000 square feet of conditioned space, this translates to 4.5 cents per SF per year to have disinfected air.
Lamp Replacement Costs: The UVC lamps last for 17,000 hours, which is just over 2 years at 24/7. The cost to replace the (24) lamps is $3,480, which is $1,740 / yr. With 60,000 square feet of conditioned space, this translates to an added 3 cents per SF. The combination of electricity and lamp replacements adds up to 7.5 cents per SF per year to have disinfected air.
Operating less than 24/7: For facilities that do not operate around the clock, turning the system off for 12 hours per day cuts the electricity cost in half and extends the life of the lamps. Given the strike voltage factor on the UVC lamps, each time they are turned off or on, they lose an average of 4 hours of life. Turning off/on twice a day is 730 switches per year and a loss of 2,920 hours per year. So, it is definitely not recommended to synchronize the UVC with the fan motor, but a facility only running a single shift for about 3,200 hours per year, will save money on the energy and extend the life of the UVC lamps by turning them of at the end of each shift. 3,200h of use + the switching penalty of 2,920h = 6,120h per year, which translate to 2.7 years of use over the 17,000 hours of the lamp life. With this single shift model, the energy cost per year drops from $2,752 down to (2,856 watts / 1,000 x 3,200 annual hours) 9,139kWh x $0.11 = $1,005, for savings of $1,746 relative to 24/7 operation.
Energy Savings from Coil Cleaning: The energy savings is typically a function of the age and condition of the Coils. Older systems (e.g. 6 to 10 years old) may generate return on investment (ROI) in under 2 years, and newer and cleaner systems my generate less annual savings extending the ROI up to 5 years or longer. The ultraviolet ROI also takes into account the reduction in maintenance time and materials needed to clean the coils. At a US average of $1.34 / SF for commercial electricity and 10% for cooling, $0.134 is a placeholder for cooling costs per SF. Clean coils can save between 5% – 15%. An average of 10% savings on $0.134 = $0.013 (one and a third cents) / SF per year. For a 24/7 facility this number could go up by more than a factor of two, yielding 2.6 cents / SF / yr. The energy savings almost covers the annualized cost of UVC lamp replacements.
Utility Rebates, Incentives, and $0 Upfront Cost Programs: Many utility companies offer Commercial and Industrial (C&I) incentives for energy savings based on annual kWh saved. Given that COVID-19 has cost the US taxpayers multiple trillions of dollars, we expect to see incentives to disinfect air from federal or state agencies to help reduce the risk of another pandemic. Purge Virus works with each account to identify the most relevant incentives and also provide $0 upfront cost programs through strategic financing partners. Our partners have approved the UVC technology for monthly payment plans, subject to credit review on 3, 4, and 5 year terms.
KEY SPECIFICATION and PRICING INFORMATION – See the Technologies page.
We welcome the opportunity to provide a technology recommendation and budget proposal based on the size of your AHU plenum(s), trunk duct(s) and CFM. The “GET STARTED” link to the data sheet is a fast and easy way to let us help show you different disinfection options.