UV Lights and Ozone Generators Do Not Filter The Air

Covid-19 has reignited the air filtration market with new ( old technology ) being offered to the public as the panacea for removing viruses from the air. Unfortunately, these old technologies are being regurgitated as the panacea for keeping you safe from airborne viruses such as Covid-19, et al.  UV lights are good for illuminating finger prints on glass if you are a forensic scientist searching for a perpetrator but this light does very little to destroy airborne bacteria and viruses. For UV light to have any affect on airborne contaminants, the particles need to be exposed for a long period of time ( from 1 to 10 minutes). Since most UV lights are installed in HVAC systems the speed of the air passing by the UV light somewhat defeats the purpose of using the light in the first place.

Ozone Generators have been around for more than 40 years and were used originally to reduce odors in commercial applications. Ozone is made up of 3 Oxygen molecules and will easily give up one of its molecules when it comes in contact with another gaseous molecule and changes the chemical nature of that molecule. This is how it reduces odors by simply changing the chemical nature of the odor producing molecule. Ozone also attacks carbon based objects and humans are basically carbon based forms. For airborne particulate, Ozone is not effective as it does not have any capture mechanisms to reduce the level of the particulate. Again, particulte would have to be in contact with the Ozone for long periods of time to have any affect at all.

Mechanical air filters, which include all media air filters including HEPA filters, are the only mechanism available to remove and capture airborne bacteria and viruses. This is why all Hospitals, clinics, laboratories and other medical facilities use HEPA or HEPA type filters to protect the occupants from viruses such as Covid-19. Even the lesser efficient air filters that are used in homes and offices that  have some minimal effect on removing viruses are better that using UV lights and Ozone generators. 

For more information on these types of air purifiers and air filters, please go to our website at:   https://www.pureairsystems.com    or callus on our toll-free number at: 800-869-8025. 

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Pure Air Systems Is Major Supplier Of Filtration Systems To Fight Covid-19

Created in 1985, Pure Air Systems was one of the first US companies to offer commercial grade, fan powered, HEPA air filtration systems for the general publc. These systems are designed to be used as both stand-alone units as well as attaching them to existing HVAC systems to provide central and whole house filtration. Over the next 10 years Pure Air Systems developed seven different sizes and configurations varying in air volume capacity from 50 CFM to 2,000 CFM. In addition the systems had the capacity to add carbon media and prefiltration in conjunction with the HEPA filters providing systems that could handle almost any air filtration or odor challenge in the market.

When Covid-19 entered the globe in eary 2020, many of the hospitals, clinics, laboratories and municipal facilities across Norht America started lookng for HEPA based air filtration systems as HEPA filters are the only type of air filter that can remove a subtantial amounty of airborne viruses. Standard air filters are, for the most part, not very effective in removing these sub-micron particulate from the air. 

The Pure Air Systems units use very powerful, variable speed drive motors ranging from 1/3 HP to 1 HP, they can move a lot of air through the HEPA filters which are extremely dense. In additon, the units can move air through ductwork that is connected to the filtration systems so they can be used to provide clean air in a large space. The systems can also be used to create either a positive or negative room area for patient isolation as is the common practice in most Hospitals.

Today, Pure Air Systems is one of only three companies around the world that produces a metal framed, commercial grade, fan powered true HEPA air filtration that can be used in a very wide range of applications in the residential, commercial, institutional, industrial and medical markets.

For more informaion on the complete line of HEPA and Carbon based air filtration systems please go to our website at:  https://www.pureairsystems.com   or call us on our toll free number at: 800-869-8025.

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Mechanical VS Electronic Air Filtration Systems

Most people are familiar with the air filters that go into your HVAC system that look like folded or pleated paper media. These are normally refered to as mechanical filters because they use the mechanics of air velocity to impinge the airborne particulater onto the surface of the filter. Electronic air filters use positive – negative charging as their method of collecting these same particles. These electronic air cleaners use plates for wire grids to trap the particles but unlike mechanical filters, are less efficient than mechanical air filters as they allow for much of the particulate to pass by the collection grids without capture. For this reason mechancial air filters are the preferred method of dust collection.

Air filters perform two major functions in HVAC systems. One is to keep the dust from accumulating on the cooling coils in your air handler to ensure proper performance of you air conditioning system. The second is the removal of airborne particulate in the air to keep the indoor environment cleaner. These mechanical air filters come in different efficiencies from general duty up the high efficiency HEPA air filters.

The use of very high efficiency mechanical filters including HEPA sysems is now extremely important due to the need to remove airborne bacteria and viruses during this pandemic. Schools, office buildings, and all medical faciities are using mechanical air filters with higher efficiency ratings to contain the airbone contaminents as much as possible.

For more information on the complete line of HEPA and Carbon based air filtration systems please go to our website at:   https://www.pureairsystems.com     or call us on our toll-free number at: 800-869-8025.

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Do UV Lights Really Kill Covid 19 ?

Ultra Violet lights (germicidal lamps) or UV systems come in both a hot (8,000 hours life) and cold plasma (rate 36,000 hours life) lamp systems. They produce a specific wavelength of 253 nanometers and produce UV C. This wavelength has the ability to affect microbiological contaminants like mold and bacteria. The UV C light can destroy the DNA of the microbiological and keep it from replicating. UV C has no effect on solid particles and it does NOT remove anything from the air stream. UV C lights are normally placed in the return air stream, although the speed of the air past the lights can minimize the effectiveness of the UV lights. We suggest that placing a UV light at or near the cooling coils works better as the light can irradiate this moist area all the time and help in minimizing the growth of mold or bacteria. UV lights are an ancillary piece of equipment and should always be used in conjunction with an air filter or air filtration system.

The Use of UV lights to reduce or kill Covid 19 viruses is somewhat limited to the distance to and the duration of time it sees the virus. That is why UV lights are more effective placed in the return air duct of the HVAC system and the fan has to be running all the time. Further more, you need really good filtration in front of the UV lights otherwise they will become coated with dirt and dust and thus significantly reduce their effectiveness.

If you look at the miriad of photos and TV footage of Hospital wards treating Covid 19 patients, you never see any UV lights in and around the patient beds. Sterilaztion with chemicals and the use of PPE are much more effective in that area of the hospital. The real danger in using UV lights is the thought that this technology is a primary method of eliminating the Covid virus when in truth it is  only a terciary device at best.

Pure Air Systems has been making HEPA based air filtration systems for over 35 years and today the use of HEPA filters has become the primary method of maintaining surgery room cleanliness in Hosptials, Clinics and laboratories all working with Covid. 19. 

For more information on the complete line of HEPA and Carbon based air filtration systems please go to our website at:  https://www.pureairsystems.com    or call us on our toll-free number at: 800-869-8025. 

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Science Is Our DNA

SInce man first walked on the earth he has been finding ways to make life easier, safer and more productive. His inate drive to explore and learn are bult into his DNA. It is a survival of the fitest condition. Everything we use and have at our disposal was invented by man ( or woman ). The balance is deliverd by Mother Nature, which is, in many ways, more powerful and more important. . Some of those things Mother Nature delivers include diseases that are benign to animals but cause significant challenges to man. In some cases man’s own drive creates the conditions by which these diseases become deadly. 

Covid-19 is science. It is biological science and it plays with our DNA. As a virus it follows the same drive as man..survival of the fitest. It will do whatever it takes to keep growing and moving as it jumps from human host to human host.It really doesn’t have a conscience or any political aspirations and is not threatened by any medicine was currently have at our disposal. It will command our attention for a very long time. It is a variant of science so obviously it will require science to tame it. Man has the ability to resolve this issue if it is taken seriously. If not, then perhaps we should paraphrase the words in Matthew 5 where he says ‘ and the meek shall inherit the earth.”

Pure Air Systems has been making HEPA based air filtration systems since 1985 and is now working around the clock to supply a wide variety of medical and commercial operations with HEPA filtration systems to help deal with the Covid-19 pandemic. For more information please go to our website at: http://pureairsystems. com  or contact us on our toll-free number at: 800-869-8025.

 

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Using HEPA Fan Powered Systems For Virus Protection

Keeping employees and customers safe in buildings, stores and other enclosed spaces will be a major part of returning to the new normal. Aside from making desks and work spaces at least 6 feet apart the ability to maintain some form of control over the ventilation systems would be the next major hurdle. The standard HAVC system in residential and commercial building is designed to move the air through return air and supply air ductwork and keep the room cool or warm. The types of filters normally used in these systems are what we call “general duty” air filters. Meaning they will remove large particles, dust and some smoke, but are not really capable of removing anything close to the size of viruese which are down to .005 microns in size. Basically a billionth of an inch.

Pure Air Systems has been making fan powered, commercial grade, HEPA air filtration systems since 1985 and has seven different configurations and air volume sizes to meet most needs in the commercial, institutional and industrial markets. Since its inception, PAS has provided a unique adaptation of their systems so they can be used in a partial by-pass configuration. This allows the HEPA systems to be connected to the main return air duct in a partial-connection taking a portion of the return air and putting in through a 3-stage filter system including a prefilter, carbon media pack and a scanned 99.99% HEPA filter. Using this concept allows for partical cleaning of the air continuously without affecting the performance of the main air handler. In most cases all the air in the room would be filtered once every 30 minutes to an hour. In addition, it is possible to add small amounts of outside air into and through the PAS unit prior to entering the main air handler which helps to pressurize the room area and also dilute the inside air. The small amount of air that is added from the outside does not really affect the temperature since the percentage is usually around 3% to 5 % of the total volume of air being cooled and or heated.

The systems offered by Pure Air Systems range in CFM volume from 50 CFM to 2,000 CFM. These systems all use variable speed motors and are digitially controlled. They are made from components all made in the USA and assembled in Indianapolis, IN. 

For more information on all of our systems please go to our website at:  https://www.pureairsystems.com       or call us on our toll-free number at: 800-869-8025.

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Ebola Is A Virus

With all the concern about Ebola one must remember the reason that Ebola, like many other dangerous pathogens, is a virus and in terms of size it is very, very tiny. Less than .012 microns in size. It requires the most efficient HEPA type filters to trap these tiny microorganisms, usually requiring a SULPA filter ( Super Ultra Low Penetrating Absolute ) HEPA filter.  This is one of the main reasons for concern when treating or being near someone who has the virus. It is easily dispersed and so tiny that many of the normal preventative gowns, masks and gloves may not be sufficient to protect everyone from coming in contact with the virus.

The use of HEPA filters for clean rooms and chip manufacturers has been around for years and hospitals require them for their surgery rooms and isolation patient care rooms. In the field, however, it is very difficult to establish truly isolated rooms or areas where those  infected with the disease can be effectively isolated from health care workers.

Pure Air Systems has been manufacturing HEPA based, fan powered  air filtration systems since 1985 and over the years more of their larger HEPA units have been shipped to the third world countries to establish some form of controlled isolation rooms and facilities to at  least try to  maintain some form of sterile  environment for treating the sick.

Now the military is establishing small isolation “tent style” portable facilities in Liberia and other near by locations to attempt  to isolate those infected with Ebola to both treat and contain the spread of the virus. These tents use HEPA filtered air and try to mimic the same type of isolation room style used in the US hospital facilities. Difficult to do but better than the alternative.

We need to remember that the most harmful of viruses and bacteria can not be seen with the naked eye so we tend to forget that being around people that are sick or infected can be problematic especially for those  individuals with weakened immune systems. Exposure doesn’t always have to be physical, it can very often be airborne so just being in the same general area with those infected can be an issue.

Pure Air Systems sells a wide variety of HEPA filtration systems ranging from 50 CFM to 2000 CFM using variable speed  controllers to allow for finite volume control to fit the specific application. While all the systems are designed as commercial units they are used by home owners and the general public on a regular basis. PAS is considered a leader in the field of HEPA  filtration and learning more about their  systems and capabilities can be a healthy choice.

For more information on the complete line of  HEPA systems please go to our website at: https://www.pureairsystems.com or call us on our toll-free number at: 800-869-8025.

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Designing On The Fly

Since March of 2013, I have been working on a re-design of a unit I built for PAS in 2006. The  portable HPS series HEPA filter  units I designed in 2006 were  used in small laboratory applications, homes and institutional operations. Like many new products I built, this one used the same commercial grade components and was not aesthetically pleasing from a consumer point of view…but it out performed everything else on the market in its size and capacity range. These units are still head and  shoulders above whatever new small commercial HEPA units are currently in the market.

The new APPAIS unit, as it will be called, is a variation on the HPS series theme and is designed as a Class II Medical Device. It will also be patented. The APPAIS unit and HPS unit used the same identical components, with one exception, and operate in the same basic manner. The major differences are in the housing design and final exit filter. The APPAIS unit is fabricated from aluminum and powder coated painted white. It also has two slots in the top housing where the prefilter ( inlet filter ahead of blower/motor) and exit filter ( after HEPA ) are located. Unlike the HPS unit, access to the prefitler and the new exit filter require no tools. They just slide out from the top where they are held in place with new slot covers.

Locating the prefilter and exit filter through slots was an idea that came to me as I was looking at the overall use of this system in the Pharmacy, Walmart, etc. market place along with typical medical facilities. Since the unit was a reverse blower/motor/HEPA filter design from the HPS, meaning the blower/motor was now on the negative side of the HEPA, replacement of the prefilter, the only filter protecting the blower/motor and electricals, would have to be changed much more frequently than in the HPS unit. This idea had some merit and actually made sense from a practical/performance point of view. There was one problem.

The fabricator of the new prototype housings was challenged to find a suitable slot cover so I worked with a local High School engineering class to design the slot covers using their Solid Works software and then produce the units on their 3-D Printer. This was the best and fastest solution to the problem and has allowed for rapid development of a part that is necessary to complete the project. Designing on the fly will create some unique challenges but also some creative solutions. Moving forward is always better than staying still or worse yet, moving backwards.

The first five pre-production units are now in the works and should be completed by the end of January 2014. Then they go out for trial testing to the FDA and other operations. Once they pass the final “usage” test the next step is introducing the new systems to the selected market.

For more information on Pure Air Systems please go to our website at: www.pureairsystems.com or follow us on Twitter @pureairsystems or call us at anytime on our toll-free number at: 800-869-8025.

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HEPA Filters As Good As A Flu Shot

This year the flu has hit the US very hard. I was up in Indiana for the Christmas Holidays and the majority of the friends and relatives we visited were either sick or just getting over the flu. This story was played out across the US and as of last report 47 of the 50 states had major out breaks of the flu. Coming back to Florida after the New Year I found that the vast majority of those Floridians that went up north to visit relatives were also suffering from the flu bug. Airborne viruses are very difficult to control.

The recommended medical approach to dealing with the flu is to get a flu shot in the summer or early fall to avoid the flu season which usually runs from October through March. And, for many people this preventative measure works. Although while it is possible to get the flu even if you have the shot, the symptoms are usually less severe and are short lived.

Since the flu virus is airborne, sub-micron in size and easily transferred from any infected surface, it is difficult to be in an enclosed structure that uses a forced air fan heating/cooling unit to not have contact with the virus when half the people in the structure are now infected. So when one person gets it..chances are others will as well. I believe many of us saw this take place over Christmas and New Years. Even wearing a mask may not help as the flu virus can live for short periods of time on many surfaces and then it is easily transferred to your hands and then eventually your face ( as we touch our faces up to 500 times per day).

Commercial grade HEPA filters are designed to remove, at a minimum, 99.97% of all particles 0.3 microns and larger with efficiencies approaching over 95% on particles smaller than 0.3 microns.  Viruses range in size from .006 microns to 0.5 microns in size. HEPA filters are the primary filtration media used by the CDC and other laboratories around the world that work with highly contagious and deadly viruses. They are extremely effective at protecting the technicians who work with these contagions.

Pure Air Systems has been manufacturing commercial grade, certified, HEPA and Carbon based air filtration systems since 1985. They are one of the leaders in offering a wide range of HEPA systems that can be digitally controlled to produce from 50 CFM to 2000 CFM. The PAS line of HEPA systems utilize the ECM variable speed motors that are rate 120/240v 50/60 Hz and can be used anywhere in the world. These units are fabricated from powder coated steel and use state-of-the-art digital control systems.  Since its inception, PAS has sold tens of thousands of its units to the residential, commercial, institutional, industrial, medical and specialty products markets in the North American continent and around the world.

The use of PAS HEPA systems in the residential market has shown over time that those homeowners have experienced fewer colds, allergies and flu symptoms than homeowners that just use standard air filters in their HVAC systems. Of course you can’t carry a HEPA filter around with you to work or the store, but you can significantly reduce the transfer of airborne viruses and allergens in your household or small office area with a very high degree of effectiveness.

For more information on the complete line of HEPA and Carbon based products please go to our website at: www.pureairsystems.com or visit us on Facebook or follow us on Twitter @pureairsystems. Of course you can always call us on our toll-free number at: 800-869-8025.

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Real Dust, Real Filters

There is a visual misconception that happens to most people when it comes to identifying what objects will do them harm. The normal train of thought is…”if I can’t see it, it won’t hurt me.” In essence, nothing could be further from the truth. Tiny, airborne and surface mounted sub-micron sized viruses and bacteria are invisible to the naked eye but can often be deadly to humans. Finely ground dust from any mineral source or pollen, ragweed and grasses range in size from 100 microns down to less than 1 micron in size. You can only see down to about 20 microns with the naked eye.

Ingestion of small amounts of tiny airborne pathogens and allergens over long periods of time can create severe and chronic health issues. And for the under 3 years, over 60 population the ratio of amount inhaled vs time may be shortened dramatically. Of course, for those individuals who are allergy sufferers or have weakened immune systems due to injury or cancer, even small amounts inhaled over a few days can create significant health challenges. While you can’t control the elements of the environment, you can control your personal environment.

Pure Air Systems has been manufacturing commercial grade, certified HEPA and Carbon based air filtration systems since 1985. For over 27 years PAS has provided high performance HEPA systems to reduce and remove these fine, harmful airborne particulate in a wide array of applications. Commercial, institutional, industrial, medical and residential customers around the world have relied on the performance of the PAS HEPA units to help them maintain a clean, healthy environment.

Air filters, the type you put in your heating/cooling air handler system, have been around for over 70 years. Originally made from metal strands they evolved to fiberglass media then cotton and now man made fibers. They became more efficient over time. However, they also became more resistant to air flow and created adverse air flow restriction problems for the heating/cooling systems. In order to actually remove the small, less than 10 micron sized particles with any efficiency ( up to 90% and greater removal) you require a HEPA media filter. The filters used in most HVAC systems today have an efficiency of less than 20% on these smaller, more harmful particles. And, some furnace filters have almost no effectiveness on anything smaller than 20 microns.

There is a reason that hospitals, clean rooms, surgery rooms, optical manufacturers, food processors, micro-chip companies, medical and commercial laboratories and many other environment-critical operations ONLY use HEPA filters or air filtration systems using HEPA filters. General duty air filters, electronic air cleaners and ionizers are basically useless when it comes to actually removing airborne particulate. The only way to deal with real airborne pathogens and allergens is to use HEPA filtration systems. Real Dust, Real Filters.

For more information on the complete line of  PAS HEPA and Carbon based air filtration systems go to our website at: www.pureairsystems.com. You can also follow us on Twitter @pureairsystems or like us on Facebook. Of course you can always call us at: 800-869-8025.

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