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Do Air Purifiers Help You Sleep Better?

We often underestimate just how vital a good night’s sleep is for our bodies to function optimally. In fact, sleep affects everything from heart health to concentration and productivity.

Did you know that air purifiers can significantly improve your sleep? From reducing airborne allergens to producing soothing white noise, air purifiers have a variety of functions that promote deep, restorative sleep and better health in general.

Find out how air purifiers help you sleep in this article from the experts at Sanuvox.

Types of airborne pollutants that affect health and sleep

There are a great many types of airborne pollutants found in our homes that affect our health and sleep. Common allergens such as dust mites and pet dander accumulate very easily in the house. These irritants can be mitigated with regular, thorough cleaning, but never truly eradicated. Sanuvox air purifiers, on the other hand, have been shown to trap 99.97% of these types of particles, making them an extraordinarily effective solution for those who suffer from allergies.

Particles from the local environment can also make their way into the house. Smog, seasonal pollen and harmful chemicals such as dioxide and carbon monoxide from vehicle traffic infiltrate through cracks, vents and windows. Sanuvox air purifiers is very effective at cleaning these types of contaminants.

If left to circulate unimpeded, these allergens and chemical contaminants can cause irritation and inflammation that disrupts our sleep and can lead to other health problems.

Last but certainly not least, Sanuvox S100 air purifiers is able to reduce the circulation of airborne viruses and diseases. In a world that has been shaken by COVID-19, air purifiers are an excellent way to reduce the propagation of the virus and help create safer spaces.

Types of air purifiers that improve sleep

There are a variety of residential air purifiers that can help improve your sleep. Different types of air purifiers specialize in trapping different kinds of contaminants that disrupt sleep.

Air purifiers with HEPA filters

Most air purifiers have HEPA filters (high-efficiency particulate air filters) that are designed essentially to trap dust. HEPA filters are multiple layers of mesh made out of fine fibreglass threads. Air purifiers with HEPA filters are able to capture 99.97% of all particles over 0.3 microns in size. Because viruses such as SARS-CoV-2 are smaller than that, air purifiers bought for the purpose of reducing virus circulation should have other purifying methods, such as UV light.

UV light air purifiers

SANUVOX UV light can be used to attack micro-organisms, making it an ideal purification method for viruses. UV light can also degrade chemicals and odours, making it quite a versatile air purification system.

Activated carbon air purifiers

Activated carbon is a purification method that is often used in conjunction with other methods such as HEPA filters. Air purifiers with activated carbon are particularly good at trapping harmful chemicals from vehicle traffic and household cleaning agents and neutralizing unpleasant odours.

Air purifiers for conditions that affect sleep

Allergies and asthma

People who suffer from allergies and asthma are particularly affected by airborne particles. Bio-allergens such as dust mites, pet dander and pollen can cause congestion, sneezing, sinus headaches and difficulty breathing, symptoms that make it difficult to get a good night’s sleep. Air purifiers have been known to alleviate symptoms of asthma and allergies, as they reduce the particles responsible for these reactions.

Sleep apnea

A study published in the Annals of the American Thoracic Society has found that air pollution significantly increases the risk of sleep apnea. The researchers found that just a 5 microgram increase in particulates leads to a 60% greater risk of sleep apnea, even when controlled for other factors. The study suggests that inhaling pollutants like nitrogen dioxide and fine particulates results in upper airway irritation and swelling, causing restricted breathing that can lead to sleep apnea.

How air purifiers help you get a good night’s sleep

Airborne particles can cause irritation that disrupts your sleep, particularly if you suffer from allergies and/or asthma. As mentioned above, they can also lead to a higher risk of sleep apnea, a condition that results in restless, interrupted, poor-quality sleep.

Poor sleep can exacerbate underlying health conditions, weight issues, gastrointestinal disorders and mental health problems. In the short term, it causes fatigue, drowsiness, irritability and reduced productivity.

Sanuvox air purifiers remove particulates from the air, reducing irritation and inflammation and improving sleep.

You can also try these tips for a better night’s sleep:

Stick to a regular bedtime
Try not to nap during the day
Exercise regularly
Try to avoid caffeine and eating near bedtime
Keep your bedroom cool, dark and quiet
Keep your bedroom clean and use your air purified!

Sleep better with a Sanuvox air purifier

Sleeping well is a vital part of staying healthy and being able to function properly. Air purifiers have been proven to improve sleep, along with a host of other health benefits. It’s clear that when it comes to health, an air purifier is an indispensable tool to have in the house!

Sanuvox is a global leader in UV air purifiers, offering a variety of cost-effective purification systems for residential, commercial, institutional and medical use. If you would like more information about our products or have decided that an air purifier is right for you, contact us!

Using Advanced Air Purification Technology in a Healthcare Facility

Summary of the effects of using advanced air purification technology (AAPT/UVGI) on post-surgery outcomes in a healthcare facility

The impact of comprehensive air purification on patient duration of stay, discharge outcomes, and health care economics: A retrospective cohort study¹.

Figure 1

Figure 1. Environmental metrics associated with ambient air and surface purity. Study results by Stawicki et al.² for St. Luke’s University Health Network (Bethlehem, PA). Three “zones” of the same healthcare facility were delimited and evaluated; Zone C is the control floor, which is equipped with hospital standard ventilation and high efficiency particulate air (HEPA) filtration. Zone B is also equipped with standard hospital ventilation and HEPA filtration, but also receives return air from Zone A upon recirculation. Zone A is equipped with ventilation, HEPA filtration and an advanced air purification technology (AAPT), which consists of UV germicidal systems (UVGI) from LifeAire™. This figure shows the results of environmental (air and surface) sampling in different zones (A-B-C) of the hospital. Staffing and standard operating procedures (SOP) were similar for all 3 zones.

Figure 2

Figure 2. Discharge destination of hospital patients post-surgery. Non-bariatric surgical inpatients admitted to the St. Luke’s University Health Network (Bethlehem, PA), with a case mix index (CMI) included in their medical record, were evaluated according to the zones they were admitted to (N = 1002 patients). Zones are as described previously; Zone A is fitted with AAPT/UVGI systems, along with HEPA filtration, Zone B is fitted with HEPA and return air from Zone A, and Zone C is fitted only with HEPA filtration. Patient populations in different zones were well balanced, with no noticeable differences in distribution.

Figure 3

Figure 3. Patient metrics and outcomes by study zone. Inpatients from zones A, B and C, (St. Luke’s University Health Network, Bethlehem, PA) were compared for their hospital length-of-stay (HLOS) and hospital charges (HC). Data was provided by the hospital and analyzed by an independent third-party epidemiologist. Data is presented as a normalized ratio of control zone (Zone C) .

¹ Stawicki SP, Wolfe S, Brisendine C, Eid S, Zangari M, Ford F, Snyder B, Moyer W, Levicoff L, Burfeind WR. The impact of comprehensive air purification on patient duration of stay, discharge outcomes, and health care economics: A retrospective cohort study. Surgery. 2020 Nov;168(5):968-974. doi: 10.1016/j.surg.2020.07.021. Epub 2020 Sep 2. PMID: 32888714.

² Stanislaw P. Stawicki, Chad Brisendine, Lee Levicoff, Frank Ford, Beverly Snyder, Sherrine Eid and Kathryn C. Worrilow (March 20th 2019). Comprehensive and Live Air Purification as a Key Environmental, Clinical, and Patient Safety Factor: A Prospective Evaluation, Vignettes in Patient Safety – Volume 4, Stanislaw P. Stawicki and Michael S. Firstenberg, IntechOpen, DOI: 10.5772/intechopen.84530. Available from: https://www.intechopen.com/books/vignettes-in-patient-safety-volume-4/comprehensive-and-live-air-purification-as-a-key-environmental-clinical-and-patient-safety-factor-a-

air disinfection hospital medical purification

How to Test Air Quality in an Office Space

Indoor air quality is becoming more and more of an issue in modern times. Buildings are being made more airtight, the use of synthetic materials is increasing, and energy conservation measures that reduce the supply of outside air are popular—all factors that negatively affect air quality.

Canadian occupational health and safety legislation states that employers must provide a safe and healthy workplace, and that includes clean, good quality air. Furthermore, improving air quality can boost employee productivity and well-being. It is in employers’ best interests to test the air quality in the office and take steps to ensure that their work environment is safe and clean for all occupants.

Office Air Pollutants

The following pollutants have a wide variety of sources commonly found in the office:

Formaldehyde from particleboard, foam insulation, fabrics, glue, carpets and furnishings
VOCs (volatile organic compounds) from copying and printing machines, computers, carpets, furnishings, cleaning materials, paints, adhesives, caulking, perfume, hairspray and solvents
Ozone from photocopiers
Carbon dioxide from the occupants of the building and fossil fuel combustion
Carbon monoxide from vehicle exhaust
Allergens such as dust mites, animal dander and pollen
Fungi and mould caused by humidity or water damage
Bacteria and viruses

These pollutants can cause people in the office to experience dryness and irritation of the eyes, nose, throat and skin, headaches, fatigue, shortness of breath, allergies, congestion, coughing and sneezing, dizziness and nausea, among other things. The term “sick building syndrome” has been coined for symptoms that appear related to time spent in the office.

How to Test Indoor Air Quality

To assess your office’s air quality, you must first conduct a visual inspection of the building. Look for possible sources of contamination or water damage, and make sure chemicals and cleaning products are properly sealed and stored. Check outside the building for any pollutants that may be drawn in through the ventilation system. The HVAC system should be inspected by a professional to make sure it is working properly.

Then, the building’s occupants should be questioned, particularly any who are experiencing symptoms. Air sampling to test for pollutants should only be done after these measures have been taken, and the sampling strategy used should be based on the information gleaned.

Equipment Used to Test Indoor Air Quality

Air sampling can be used to compare indoor and outdoor air quality, identify problem areas, and test hypotheses about the source of the problem. There are many different types of equipment that can be used to test the air, such as samplers, analyzers, and direct-reading devices. Some measure the air quality continuously, while others take one sample at a time. Some require lab analysis and specialized training, while others are simple to employ.

Simple, preliminary measurements such as temperature, humidity, air movement and CO₂ levels may be done by anyone using portable devices, but these are limited in terms of their accuracy and ability to analyze the data. It’s best to have a qualified professional test the air quality in your office to identify the problem and work on a solution.

For more information on how to test air quality in the office, consult Health Canada’s guide to indoor air quality in office buildings.

How to Improve Indoor Air Quality

Control Pollutants at the Source

It’s important to control the causes of airborne pollutants in the building wherever possible. Too much humidity can lead to the proliferation of mould and other biological contaminants, so spills and leaks should be addressed promptly. The building should be cleaned frequently with non-toxic cleaning products. Consider investing in low-VOC carpets and have them vacuumed on a regular basis. You may also want to add plants to mitigate CO₂ levels.

Improve Ventilation

Most office buildings rely on a ventilation system that pulls air in from the outside to improve the air quality indoors. However, if the ventilation system is clogged, faulty or has been hampered in order to cut heating and cooling costs, the air quality will inevitably suffer.

Purify the Air

Commercial air purification systems and UV air disinfection products make all the difference when it comes to office air quality. SANUVOX commercial air purification system can help you to eliminate or purify airborne pollutants, protect your employees and even help decrease HVAC energy consumption by keeping your coils clean !

Improve Office Air Quality with Sanuvox

Sanuvox is a North American leader in air purification and disinfection in the workplace. Our patented UV technology destroys contaminants and degrades chemicals and odours, significantly improving the air quality indoors.

If you would like to provide a safe work environment and boost your employees’ productivity and well-being, contact Sanuvox today! We’re a breath of fresh air.

air office purification

10 Air Purifier Myths Debunked

Rumours about air purifiers circulate almost as much as the particles they catch! If you’ve ever wondered whether air purifiers can do everything they advertise, you’re not alone. People have a lot of questions about the effectiveness of air purifiers and whether they’re safe for use or not.
Luckily, the experts at Sanuvox are here to separate fact from fiction! In this article, find out the truth behind 10 common air purifier myths.

Myth 1: Air purifiers don’t do anything

Air purifiers are often misconstrued as a waste of money with no significant benefits. This couldn’t be further from the truth. Air purifiers are extremely effective at trapping all kinds of harmful airborne particles and pollutants commonly found in the home, from dust mites, pollen and mould spores to carbon monoxide, hydrocarbons, and viruses.

Just because air purifiers are quiet doesn’t mean they aren’t doing their job. If you need convincing, just pull out the filter and see for yourself how much debris the device is trapping!

Myth 2: Air purifiers are bad for you

Air purifiers are good for you! By removing particles from the air, air purifiers alleviate symptoms of allergies and asthma, reducing irritation and inflammation and improving sleep Air purifiers can also trap harmful pollutants that would otherwise lead to an increased risk of cancer, Alzheimer’s, heart, and lung disease.

Myth 3: Air purifiers emit ozone

If you’re worried that air purifiers are bad for you, it may be because you have heard that they emit ozone. This used to be true, but it’s not the case anymore. Before 2005, the most popular air purifiers were ionizers that were essentially ozone generators. In 2005, Consumers reports showing that these types of air purifiers not only did a poor job of cleaning the air, but also exposed users to potentially harmful ozone levels.

Technology has come a long way since then, and most ionizers now produce negligible amounts of ozone. Of course, if you are still concerned, you can simply select an air purifier that does not include an ionizer. Air purification systems that rely on filtration or UV light do not generate ozone.

Myth 4: Air purifiers give off dangerous radiation

In fact, just like every other electronic device in your home, air purifiers do emit small amounts of electromagnetic radiation. Microwaves, cell phones, TVs and air purifiers all irradiate some level of EMF (Electro Magnetic Frequencies) radiation. The important thing to note is that these levels are extremely small and not remotely dangerous for your health.

Myth 5: If you have AC, you don’t need an air purifier

Air conditioners and air purifiers have completely different functions. Air purifiers clean the air by filtering out 99.97% of airborne particles. Air conditioners cool the air but have no effect whatsoever on harmful particulates and pollutants. While some air conditioners are equipped with filters, these are not nearly fine enough to trap the harmful particles targeted by air purifiers.

Myth 6: Air purifiers lower humidity and dry the air

You may be thinking of dehumidifiers! It’s easy to confuse the two because dehumidifiers can also lessen allergens and mould, but they go about it differently. Warm, humid air creates a breeding ground for mould growth and makes it easier for allergens to circulate. Dehumidifiers help prevent this by removing the moisture from the air, while air purifiers have no effect on humidity but trap the particles that are already circulating. Dehumidifiers and residential air purifiers are being used together to optimize the air quality in your home!

Myth 7: If you clean your house, you don’t need an air purifier, and vice versa

Household cleaning focuses on surfaces, while air purifiers clean the air. No matter how much you dust, and vacuum, dander, pollen, and mould spores can still permeate the air in your house. On the flip side, if you neglect cleaning, the most powerful air purifier in the world won’t be able to keep up with the settling dust. Cleaning and home air purifiers should be used together for best results.

Myth 8: HEPA filters trap odours, gases and VOCs

While HEPA filters are the gold standard for air purification systems, they are designed to trap solid particulates larger than 0.3 microns. Gases, all VOCs (volatile organic compounds) and many viruses are small enough to pass right through. Activated carbon filters and UV lights are the only ones that show some effectiveness for these types of pollutants.

Myth 9: UV air purifiers don’t work

While HEPA filters are designed to trap particulates, UV air purifiers use high-intensity germicidal UV light to break down micro-organisms and any DNA or RNA bio-contaminants like viruses. Some argue that the contaminated air doesn’t pass through the UV light for long enough to be properly purified, but scientifically conducted testing has confirmed that processes such as Sanuvox’s patented high-intensity J-lamps deliver a high enough dosage of UV light to effectively break down the contaminants.

Myth 10: All air purifiers are created equal

Just like any other device, think about computers or cars for example, there are a wide variety of air purifiers on the market. They differ in terms of the amount of space they cover, how much noise they make, and what kind of purification technology they use. When looking for an air purifier, it’s important to consider your needs and do your research to find one that suits you.

Fact: Air purifiers are safe, effective, and available at Sanuvox!

Air purifiers are safe and effective. They are not rendered unnecessary by air conditioning or thorough cleaning. Different varieties of air purifiers are effective at purifying different types of contaminants, so it’s important to consider that when choosing which one to buy.

If you have more questions about UV air purifiers or would like to talk to a Sanuvox representative about our products, contact us today!
Learn more about available products, markets, and applications and access our company’s blog and whitepapers on this website.
Follow Sanuvox Technologies on Facebook (@SanuvoxTechnologies) and on LinkedIn (@sanuvox-technologies).

*Full laboratory test report available upon demand.

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Understanding air filtration and UV disinfection in a medical environment

Health Europa reports on why UV purification is the most effective air disinfection method for medical, commercial and residential environments.

Evidence has accumulated over the years that following the standard guidelines and codes for designing healthcare facility ventilation systems is far from sufficient to ensure a sterile environment. Sterility is generally defined as 6 log (99.9999%) reduction of a population of microorganisms. This means that as little as one microorganism in a million is expected to survive after disinfection.

Traditional air filtration with high-efficiency particulate air (HEPA) filters or ultra-low penetration air (ULPA) filters have been widely adopted in the ventilation systems of hospitals, labs, and clinics, to control airborne pathogens. However, multiple studies have demonstrated that despite the use of such high-end filters, viral and bacterial airborne contamination are still ubiquitous in these ventilation systems.

The most common explanation for underperforming filters often points to the filter rack seal joint’s bypass, filter puncture leakage, and poor general installation or maintenance. Although all these points remain valid and can always be improved, the physical cause is rooted in the fundamental fact that all filters show a significant drop in their capture efficiency for a certain range of particulate sizes – these can include both particles which are too small to be captured by interception and impaction and those which are too large to be removed via electrostatic and diffusion. This is simply a straightforward consequence of the fundamental principles of filtration physics. […]

Using Sanuvox UVC technology to reduce the propagation of SARS-CoV-2 virus

UVC irradiation (254 nm) is known for its germicidal properties. By disrupting their nucleic acids (DNA/RNA), it inactivates the reproductive capability of biological pathogens (molds, viruses, bacteria).^{1, 2}

Sanuvox in-duct units have been demonstrated to be up to 99,97% effective at inactivating viruses and bacteria in the air in a study conducted by the EPA and Homeland Security³. Bacteria and virus tested in the study (B.atrophaeus, S.marescens, MS2) are known to be more resistant to UVC than SARS-CoV-2 virus. ^4,5

Many engineering and health agencies (ASHRAE, REHVA, CDC) now recognize that airborne transmission plays a major role in the propagation of SARS-CoV-2, the virus responsible for COVID-19. These agencies also recommend using UVGI as an effective method to mitigate the spread of the virus in indoor spaces. ^{6, 7, 8, 9}

Because Sanuvox units are specified according to HVAC systems parameters, adequate UV output power is calculated using our proprietary software. As such, patented Biowall units can achieve the recommended 99% disinfection per pass regardless of air velocity.

¹ https://www.fda.gov/medical-devices/coronavirus-covid-19-and-medical-devices/uv-lights-and-lamps-ultraviolet-c-radiation-disinfection-and-coronavirus

²https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2789813/

³https://cfpub.epa.gov/si/si_public_record_report.cfm?Lab=NHSRC&address=nhsrc/&dirEntryId=154947

⁴https://www.springer.com/gp/book/9783642019982

⁵https://www.researchgate.net/publication/339887436_2020_COVID-19_Coronavirus_Ultraviolet_Susceptibility

⁶https://www.ashrae.org/about/news/2021/ashrae-epidemic-task-force-releases-updated-airborne-transmission-guidance

⁷ https://www.cdc.gov/coronavirus/2019-ncov/science/science-briefs/scientific-brief-sars-cov-2.html

⁸https://www.rehva.eu/fileadmin/user_upload/REHVA_COVID-19_guidance_document_V4_09122020.pdf

⁹ https://www.ashrae.org/technical-resources/filtration-disinfection

Other articles that might interest you:

air contaminants disinfection germicidal infection virus

Sanuvox UV air purifiers capabilities against viruses

Sanuvox corporation, a North American leader in UV disinfection of air and surfaces, would like to warn people tempted to purchase air purifiers or other devices against potential claims that would find themselves misleading.

UV air purifiers installed in the HVAC system, with an adequate germicidal dosage sized for the air flow, will destroy airborne viruses, but cannot guarantee anyone from becoming infected.

Air purifiers inside HVAC cannot disinfect frequently touched surfaces such as door handles and light switches, which are common disease transmission path. So good hygiene practice and frequent wash of hands continue to be the safest way to protect ourselves against any airborne or surface contaminants that can be introduced by other occupants and dispersed by the HVAC system in the house.

In other words, a powerful UVC air purifier can reduce the possibility of spreading the contaminants through the HVAC system, but it does not eliminate the necessity of safe hygiene practices.

Because the susceptibility to germicidal UV of any microorganism is determined by its genome sequence, the germicidal UV dose required to kill the CoVid-19 is practically the same as for the SARS-CoV (2003) within less than 1.6% variance.

For additional technical information regarding Covid-19, please visit https://bit.ly/38t12Mo.

Other articles that might interest you:

air contaminants coronavirus disinfection germicidal infection surface virus

New York Hutterite Colony, February 2020

The case

In a Hutterite Colony in New York, Southern Alberta, black mould contamination was happening in a walk-in cooler.

The Problem

Aspergillus Niger (black mould) spores were reproducing at a high rate, which required a complete washdown and sterilization of
the cooler every week, to prevent individual health issues. Mould would form on the shelves and the necks of the preservative jars.

Hutterite Colony Walk-In Cooler Coil Sanuvox Installation at Hutterite Colony

Sanuvox Customized Solution

The cooling unit was cleaned by a refrigeration technician and a Sanuvox IL40-G was installed to destroy the spores early July 2017.

Conclusion

There has not been any reoccurrence of mould in the cooler. Two months after install, the Colony bought two crates of pears, same harvest and variety. They stored the crates in two different walk-in coolers. The pears in the cooler without Sanuvox UV treatment started turning brown and rot within 5 days.

The pears in the cooler with Sanuvox UV showed no signs of degrade. The increase of shelf life of produce impressed the Colony and since then, they equipped the 2nd cooler, along with a root vegetable cold storage room. The Colony is very pleased with the Sanuvox equipment and appreciate having clean cooler with food that is not contaminated with black mould.

air food IL mold

Food Distribution Center, June 2018

The case

Controlling odors in the onion storage room at a food distribution center for a national grocery store chain.

The Problem

To prevent onion odors from contaminating fruits and vegetables stored in adjoining rooms, the onion storage room is kept at a negative pressure using a 3,000 cfm exhaust fans. The customer had two main objectives:

1.To control the onion odors

2.To reduce the amount of exhaust air to lower the associated cost of conditioning makeup air

Sanuvox Customized Solution

Sanuvox provided two IL30-X units that were installed upstream of the cooling coil in a 27,000 cfm air handler to photo-oxidize the onion odors.

Conclusion

Onion odors were dramatically reduced, and exhaust air lowered by 40% to 1,800 cfm. Energy savings from the reduction in exhaust air is equivalent to 3 tons of cooling.

air food IL odors

Prominent Houston Hospital, 2015

The case

A prominent Houston, Texas hospital’s air handler units were covered in Aspergillus due to poor filtration and internally lined insulation. Sanuvox IL Coilclean was able to reverse clean the air handler units preventing any contamination in the hospital and saving the hospital thousands of dollars in energy due to reverse cleaning the cooling coils.

The Problem

Our distributor, The Filterman LLC, received a phone call from a prominent Houston, Texas hospital with a severe microbial problem. Aspergillus was growing on the evaporator coil, the transition ducting and the HEPA filters. The hospital was using substandard filters and were not sealing the filters to prevent air bypass. Houston summers routinely get above 100 degrees F and range up to 90% humidity. Biofilm growth in the fins of the cooling coil was preventing proper dehumidification and reducing the air handlers cooling capacity, resulting in thousands of dollars in wasted energy.

After 4 years of poor filtration, the air handler units were covered in Aspergillus. The black internally lined insulation was completely white with mold growth. The HEPA filters began accumulating moisture due to the fouled evaporator coils further promoting mold growth and reducing the filters life.

Before: Pan is full may need to unclog drain of the biofilm accumulating

Sanuvox Customized Solution

Together with The Filterman, Sanuvox sized each evaporator coil, measured airflow, duct dimensions and recommended the Biowall 60” fixture per transition ducting and specific sizes of the IL CoilClean product based on coil dimensions for each of the air handler units throughout the hospital.

Conclusion

Within 4 months of Sanuvox Biowall and IL CoilClean installation, the evaporator coils began releasing biofilm that had accumulated through the fins of the coils. This biofilm reduced the efficiency of the cooling coil and restricted dehumidification of the air, which became the source of contamination. The internally lined insulation began turning black again as the mold growth was disinfected. The HEPA filters were changed and 5 years later, have still not grown mold.

Installation of a BioWall in the ducts

4 days incubation time

air Aspergillus Biowall coil filters HEPA hospital HVAC IL medical UV