We understand from working with Dentists that they need help ASAP!
Many businesses need help, but some of our first and most urgent calls came from dentists who face dire economic challenges from the inability to service their patients.
Focus Area: Dental Office and Operatory Rooms
Needs: Acute Air Disinfection
Standards: American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) – Health Care Facilities: Chapter 9 Section 9.17
ACH Average: 8 to 12 Air Changes per Hour (ACH). For code compliant Operatories, the existing HVAC system delivers air changes every 5 to 7.5 minutes.
Solutions: HVAC devices for Coil and Duct disinfection, Wall Mounted Upper Air Treatment with Germicidal UVC Light devices in each Operatory, or a combination of both for maximum disinfection.
This solution allows Dentist and Patients to BE IN THE ROOMS DURING DISINFECTION
SAFE and CONTINUOUS Disinfection DURING OCCUPANCY
This device series comes in three different sizes to match the approximate size of the rooms, and multiple devices are recommended for areas larger than 300 sq ft.
Samples and full orders are currently backlogged given production demand. Delivery time as of 05/01/2020 is three (3) weeks.
Note: This device allows Dentists to work with patients at any time during office hours. There are a broad range of other types of UVC devices, many of which require clearing the room and setting timers during the sterilization.
How it works: Direct exposure to UVC is harmful for humans, so this device is mounted 7 feet from the finished floor and includes louvers, horizontal to the floor plane. This Germicidal UVC Light is 27.7” wide x 5.2” high x 6.6” deep. It is a gold standard for Dental Operatories, because it delivers a high dose of UVC and takes advantage of the high frequency of air changes. To learn more about options for integration with HVAC ducts, see Germicidal UV Light.
Advantages over other Devices: For Dental Operatories, the upper air solution is more effective at irradiating pathogens than floor or table devices, containing internal fans, because this technology treats the air across the full width and length of the Operatory room for continuous disinfection during occupancy. The devices come in widths of 18.5” (12 watts), 27.7” (24 watts), and 37.5” (36 watts) for coverage of 100 sq ft, 200 sq ft, and 300 sq ft respectively. The TB series are the most popular with Dentists, given that Operatories average between 100 and 180 sq ft. Ultraviolet germicidal irradiation (UVGI) is a proven disinfection method to kill or inactivate microorganisms by destroying nucleic acids and disrupting their DNA. This leaves them unable to perform vital cellular functions.
BUDGET BREAKDOWNS by Dental Practice Size
(See the SUPPORT NOTES at the end of this page for added information)
KEY SPECIFICATION and PRICING INFORMATION – See the Technologies page.
Combination Wall & Ceiling Mount Devices: Surgical Operating Rooms have set the precedent for disinfection. Some Dentists 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 Dental Operatories that have a door to prevent people from entering during the ceiling fixture surface disinfection.
Market Traction to Date:
Since the second half of the 20th century, one of our US production partners has manufactured more than 50,000 germicidal UV light devices. The client list is extensive, and here are just a few examples of major accounts:
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
Production Availability: As of April 28, 2020, the manufacturing of these upper air devices for Dental Operatories are backlogged with a 3 to 4 week production time. The US manufacturer has over 50 years of experience and over 50,000 ultraviolet devices installed to date across the line of devices that also include ceiling mounted fixtures, in-duct and coil & fan sanitization technology for properties that are typically larger than Dental Care Facilities.
To Learn More: Please Contact Us. We will provide complete specifications, testing reports, and support information. Note: Please make sure to let us know the approximate sq ft of one or all of the Operatories, and we will let you know the appropriate size device for each.
For business owners and operators of other types of facilities, we welcome the opportunity to help guide you along the path to sanitized air.
$0 Upfront Cost Options
We understand that dentists and other types of doctors and business owners have been stretched thin with working capital given COVID-19. We have strategic relationship with multiple financing companies that have over $300 million available to spread the cost of disinfection technology over 3, 4, or 5 years. This provides business owners with $0 upfront cost options and monthly payment plans for both the germicidal UVC light and/or the installation. The rates are typically a few points over the prime rate, and the credit applications for under $250,000 of installed equipment are just one page, without requirements for financial statements. Please let us know if you would like to receive the credit application, and there is no charge to submit it. This allows you to review the monthly cost structure relative to the upfront costs.
The Science Precedes COVID-19
(Read before purchasing any equipment)
1. Scientific Highlights: The Sun generates Ultraviolet (UV) light across the wavelength range in nanometers from 100-400 nm. UV is divided into three bands: UVA (315-400 nm), UVB (280-315 nm), and UVC (100-280 nm). The ozone layer in the stratosphere absorbs UVC. Life on Earth has evolved without exposure to UVC, which makes a broad range of life forms vulnerable if exposed to it. The UVC photons are energetic enough to damage the DNA and RNA of microorganisms, destroying their ability to replicate. Different microorganisms respond differently to UVC. Viruses are very susceptible to it, bacteria are less susceptible, and fungal spores are the least susceptible. This means that applying the right dose of UVC is the key to killing the pathogens.
2. Technology Highlights: The lamps used in the devices described above are similar to typical fluorescent tubes in offices around the world, but they do not have the phosphorescent coating which delivers the soft white light. Many commercial UVC lamps are low pressure mercury lamps that emit UV energy at 253.7 nm, which is an ideal wavelength for disrupting the DNA of microorganisms such as viruses. The wavelength of the devices described on this page is 253.7 nm. The Center for Disease Control and Prevention (CDC) and The National Institute for Occupational Safety and Health NIOSH have recommended permissible exposure limits for different UV wavelengths. For UVC, at 253.7 nm wavelength, the recommended exposure limit (REL) is 6,000 joules per centimeter squared (6 mJ/cm2) for a daily 8 hour work shift. UVC devices are being used at increasing levels all over the world in various form factors and applications to disinfect water, air and surfaces.
3. Safety and Disinfection Dosage: When people enter the room, they see a blue glow coming from the wall mounted UVC device, described above. Time, intensity, and distance = dose. At the device intensity, an occupant would have to stand on a chair and stare straight into the light for a while to achieve the harmful levels of dose. At 10 ft away from this device, the intensity factor is .115. The intensity at 1 meter is 120 uW/cm2 (Micro-Watts per square centimeter) and at 10 feet away the intensity is 13.8 uW/cm2. This is key, because effective germicidal impact is over 10 uW/cm2. (chart below). In joules per second, this equates to 0.0138. This device has been engineered and installed over many years at many facilities to provide the key combination of both safety and disinfection. See: Reducing Infectious disease transmission with ultraviolet germicidal irradiation (UVGI) – ASHRAE Report 2020-2017
4. Pros and Cons of Direct Dosage vs Fan Based Systems: Irradiating pathogens does not happen instantly. Disrupting the DNA of microorganisms such as viruses can take up to 100 seconds, subject to germicidal UVC dosage levels. Fan based devices come in many shapes, sizes, and price points. Some of them are designed to be placed on the floor or a counter, while others are designed for ceiling installation. Regardless of the form factor and location, fan based devices typically draw air into the equipment, partially treat it, and exhaust it without fully irradiating the pathogens. The cycle then continues. With these types of devices, the air speed passing the UV or UVC luminaire is a key factor in addition to the wattage of the luminaire relative to the number of pass-by air intervals needed to fully kill the pathogens. For a 10’ x 12’ room with a 9’ ceiling (approx 1,000 cubic feet), it may take 15 minutes or more to clean the air in the room. Plus, the sides and corners of the room farthest from the fan device is treated less acutely than the air near the device. By contrast, direct dosage devices, such as the upper air wall mounted technology described on this page, can irradiate all of the air in the same size room within 5 to 7.5 minutes. This is due to the fact that code compliant HVAC systems in rooms, such as dental operatories, have 8 to 12 Air Changes per Hour (ACH). The air moves slowly around the room and across the ceiling giving the UV time to kill the pathogens rather than rushing it by the UV elements inside of a fan based device. The result is faster and more thorough air disinfection with direct dosage. There is a place for fan based devices or in-duct devices for properties such as office buildings that do not need acute disinfection. Dental operatories and other healthcare facilities warrant the most aggressive form of pathogen irradiation, as do certain quick serve restaurants and other facilities with high traffic of different people moving though the space.
5. UVC and UV: Not all ultraviolet wavelengths are created equal when it comes to irradiating pathogens. Ultraviolet-C (UV-C) is between 100 and 280 nanometers (nm). UVC has been proven to have an incredibly high capacity to kill pathogens, including viruses. UV is a broader range 100-400nm, and 405nm is just outside of UV and is used by some manufacturers. The 405nm wavelength has demonstrated capacity to reduce the mitigation of some viruses, but it is not as potent as UVC. Remember that time, intensity, and distance = dose. While the number 405 is higher than 100-280, the intensity is inverted. The devices described here use 253.7nm, which is the peak performance for germicidal effectiveness. (See chart below and ASHRAE Report 2020-2017). When considering a UV or UVC device, ask your potential service or technology provide about the nanometers used in the equipment. Facilities with acute needs such as dental operatories and other healthcare facilities warrant germicidal UVC light, as do certain quick serve restaurants and other facilities with high traffic of different people moving though the space.
- ASHRAE Handbook (2020). Position Document on Airborne Infectious Diseases – Reaffirmed by Technology Council February 5, 2020.
- ASHRAE Handbook (2016). HVAC Systems and Equipment, Ultraviolet Lamp Systems. Ch. 17 Section 5 Safety – Exposure Limits. Recommended exposure limit (REL) 8 hour work shift for UVC.
- ACGIH (2015). Theoretical Limit Values and Biological Exposure Indices, Cincinnati Ohio.
- Kauffman R (2011). Study the degradation of typical HVAC materials, filters and components irradiated by UVC energy. ASHRAE Research Report RP-1509.
- IESNA (2000). Lighting Handbook: Reference & Application IESNA HB-9-2000, New York.
- Harm W (1980). Biological Effects of Ultraviolet Radiation, New York. Cambridge University Press.
- NIOSH (1972). Criteria for a recommended standard: Occupational exposure to ultraviolet radiation. Publication 73-11009, Washington D.C.
Note 1: Focus on Coils. In some cases, the Coil system is sufficient without the added HVAC Duct Devices. The added advantage of the Coil system (with or without the duct devices) is the annual energy savings that comes by keeping the Coils clean. 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 ROI in under 2 years and newer and cleaner systems my generate less annual savings extending the ROI up to 5 years.
Note 2: Hidden from view. The Coil and Duct solution is the most cost effective, and it is “invisible” to the occupants. It is often overlooked as an option, because of the perception that it is more complicated to install than plugging in floor devices or hanging wall mounted devices. The installation cost is definitely higher per device than other options, but there are far fewer devices to install at the Coil and in the trunk duct than in each room.
Note 3: Technology matching. The plugin floor or wall mounted devices are typically more widely used in areas with “acute” disinfection needs, such as dental operatories more so than in general use office environments.
Note 4: Transition to clean. The reception area is one “acute” transition area in an office, that may warrant a floor or wall mounted UVC device to accelerate the disinfection from the hallway to the interior of the office.
Note 5: Calculation factors. The estimates in the tables above are based on some rules of thumb calculations: Each ton of cooling typically correlates to 400 cubic feet per minute (CFM) of air flow. The average static pressure in the HVAC system is .08. The plenum size at the Coil is based on 1.25 sq ft per ton of cooling. The optimal ratio of the plenum is 1:2 (height to width)
Note 6: Electricity cost to operate. The power consumption of these solutions is less than 500 watts. Running during office hours, for 3,200 hours per year, the annual electricity consumption is 1,560 kWh. At the US average of $.11/kWh, the operating cost is $171.60 for the 5,000 sq ft office. This averages to $.034 (three and half cents) per sq ft per year. For information on the operational maintenance cost see the FAQs page.
To help us size the UVC Coil system for you and provide a free estimate, please LET US KNOW the following. Click for Data Sheet in excel
Portable Device Options for Dentists:
Each of these ultraviolet disinfection devices are portable. They come with cords and plugs to easily power up with standard wall outlets. The advantage of the portability is that business owners, homeowners, or apartment tenants can move them when needed to rooms that may have more acute needs for disinfection than other areas.
This portable device below is ideal to plug in the wall and sit on the floor, a shelf, or a counter:
Input Voltage: 100-240 V AC
Input Frequency: 50/60 Hz
Power Supply Output Voltage: 12 V DC
Amperage: 0.800 A
Electric Consumption: 9.6 W
Power Supply Capacity: 2.08 A
4 different model #s are available with varying degrees of plasma/ionization output. The key is to balance the size of the room with the Air Changes per hour (ACH). As an example, a room like a dental operatory that is 10′ x 11.5′ (115 sq ft) with 8 ACH, the PR20 is the best choice. See the the chart below:
Each of the different models is the same size. Length: 10.6” Width: 4.0” Height: 8.6” Weight: 3.85 lbs Power Cord Length: 8’
Plug in Wall, Counter, or Shelf Device:
VIDEO: Ultraviolet Wall Mount Device with Photoplasma and Portability Video (2.5 minutes long)
Universal Power Supply
Adjustable Output Remote Control
Optional Wall Mount Kit
Portable, Space Saving Design
Eliminate odors, smoke, and chemicals
Reduce bacteria, viruses, mold, and other micro-contaminants
Improve the hygiene in the air and on surfaces Certified to be safe, proven to be effective
Portable or fixed installations – take it wherever you go
Completely automated and chemical-free Maintenance free – requires simple annual UV lamp replacement
How does the PR series work?
Ultraviolet light, ozone, photoplasma, and negatively-charged ions exists in Nature as powerful and effective disinfectants, perfectly designed to destroy odors, bacteria, viruses, mold, and mildew, and to break down unwanted chemicals and compounds.
- UV light is powerful enough to penetrate the cell walls of bacteria and viruses, shattering their DNA, making it impossible for them to grow and reproduce.
- Negatively-charged ions attract and bind with contaminants in the air, weighing them down.
- Photoplasma oxidizes and sanitizes
- Photo-catalytic oxidation break down pollutants (including nicotine, urea, and ammonia)
This portable device below is ideal to plug in the wall and sit on the floor, a shelf, or a counter:
Plug in Floor Device up to 1,000 sq ft of coverage area:
VIDEO: Ultraviolet Floor Device with 1,000 sq ft max coverage (1.5 minutes long)
Self-Contained multi-stage air purifier that is easily transportable for on-demand use with settings for rooms that are 160 to 1,000 sq ft.
Stage 1 — Prefilter: 5 Micron Rating Gas Adsorption Layer: Activated Carbon
Stage 2 — High Efficiency Filter: 0.3 Micron Rating Gas Adsorption Layer: Activated Carbon
Catalyst: TiO2 Anatase Dimensions: 21.5″ W x 18.5″ H x 8″ D
(55 cm W x 47 cm H x 20 cm D)
Weight: 23 lbs (11 kg)
Sound Level: 48-68 dBA
Maximum Air Volume: 265 CFM (8 m3/minute)
UV-C Lamp: 254 nanometers (germicidal)
Two Options Available:
Option #1: Line Voltage: 115 V/60 Hz, Max 92 watts, Max Amperes: .77 ampere
Option #2: 220 V/50 Hz, Max 59 watts, Max Amperes: .26 ampere
CARB Certification Pending – Currently Unavailable in California