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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Pressurizing Your Home To Minimize Infiltraton of Outdoor Particulate

When people purchase a home their primary concern is size, number of bedrooms, baths and back yard size. Concerns about the HVAC system, the heating/cooling unit, are seldom brought into the decisoin, Yet, this unit and associated returns, supplies and duct work, can make your home a dream home or living nightmare. Today, in most areas of the country it is now required to have a blower door test to determine if your home is postitive or negative when the HVAC system is operational. If the test shows the house to be positive, meaning that air is being pushed against the interior of the house and keeps the home from any infilatraion from the outside. Obviously, the opposite occurs when the tests show the house to be negative. Under these conditions the house will actually suck in any fine particles through any passage way between the interior and exterior of the home. This means more dust and allergens as well as bringing in more moist hot air in the summer and cold dry air in the winter which make the HVAC system run longer and work harder and crate higher energy bills.

Sizing of the HVAC system should be done by professionals and higer Seer rated systems are must more efficient over the long haul. You may want to have a blower door test done on your home if it is 10 years or older. if the house is negative is it possible to make some modifications to the returns and supply runs to adjust for this issue. Using the correct size and rated filter for your home and system is also critical. The more efficient air filters may work better at removing airborne particulate but if they are too restrictive they can reduce the air flow through your HVAC unit and crate negative pressure in your home. In any case, keeping your home pressurized is the positive way to go.

For information on the Pure Air Systems line of HEPA and Carbon air filter systems pleae go to our website at:  https://www.pureairsystems.com   or call us anytime 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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Un Masking Covid -19 Size Does Matter

Wearing a mask during the current pandemic has been accepted by and also rejected by large portions of the US population.Some of reasons are political, some are irrational and some are based on science. The latter being the more logical rationale.

It seems that the, “What you don’t see won’t hurt you”, mindset has taken over our ability to feel threatened by the virus. Yet, this virus like all airborne viruses has no concience or cares little about your ability to see it. You can only see particle sizes down to about 20 microns with the naked eye and this virus is about 0.005 microns in size which makes it only visible using an electron microscope. When someone who has Covid-19 talks, coughs, sings or laughs they are expelling millions of sub-micron particles into the air, some as droplets some as fine, invisible mist. The closer you are to that individual and the longer you stay in close proximity to that individual the larger the concentration of the virus you will breathe in. Unless of course you are wearing a mask.

The use of any covering over your mouth and nose is by far much safer than wearing nothing at all. Maks will prevent you from getting high concentrations and also minimize the amount of the virus you may transmit if you are infected. It is, in essence, the human thing to do.Covid -19 will continue to be with us for a long time just like the other Covid viruses for which many of us get inoculated each Fall to reduce our chances of getting the Flu. And, like the Flu this virus is always changing and the longer it stays around the more virulent it becomes and the less exposure you will need to become ill.

Pure Air Systems manufacturing a complete line of HEPA based, fan powered filtration systems for the residential, commercial, institutional and medical markets. We are currently producing a large number of HEPA based air filtration systems for the medical and commercial markets to assit them in removing Covid-19 in many of their operations. PAS is as major supplier of HEPA systems throughout North America.

For more information please contact us via our website at:  https://www.pureairsystems.com    or call us on our toll-free number at: 800-869-8025.

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Covid-19 HEPA Masks

The Corona Virus pandemic has brought out a cry for protective gear, masks, respirators and ventilators not to mention HEPA based air filtration systems to maintain positive pressure rooms in make-shift hospitals. HEPA filters are made from special paper-like materials that are extremely dense and designed to capture a very high percentage ( usually 99.99% or greater ) of sub-micron particulate. These filters are used in surgery suites, laboratories, chip manufacturing, and any place where airborne particles ( bacteria and viruses ) are present. 

With the Covid-19 pandemic there is a race to provide any type of mask for the first responders, medical personnel and now the general public. This demand has brought out a number of individuals and groups making masks ( or printing them ) out of various materials; mostly cloth of some kind. However, some are offering HEPA masks that look like a regular cloth type mask. True HEPA masks worn by first responders are PAPR masks. Positive Air Pressure Respirators.These masks have true HEPA filters in their design and also have fans to assist in pulling the air through the HEPA filters. These masks are battery powered. Without the assistance of the fan you would would have difficulty pulling air through the mask with your own lungs as the HEPA paper has extreme resistance compared to standard surgical masks. 

The N-95 masks are similar to MERV 8 air filters. They are good for 95% of particles in the 3.0 to 10.0 micron range. Certainly much better than cloth but not as good as HEPA media. The reason this is important is that viruses, such as the Covid-19 virus, can be as small as .0005 microns in size. As a comparison, your hair is about 100 microns in diameter. This sub-micron size makes Covid-19 airborne and allows it to pass through standard mask materials. This is why this virus is so deadly. 

For more information on HEPA filters 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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Coronavirus and HEPA Filtration

Viruses are very tiny microbial particles. They are less than .012 microns in size and are easily transmitted by air or touch. The masks that people are wearing to protect themselves from this virus. Unfortunately this is just not the case.

In order to remove viruses from the air you need some very special HEPA type filters. These are called SULPA filters. This stands for Super Ultra Low Particulate AIr or Absolute filters. These are used by the CDC and other medical clinics around the world. Most of the masks now worn by people for protection are not capable of removing any viruses and most bacteria. They are good for removing large dust particles. HEPA masks are available but very expensive and hard to breathe thru as the HEPA paper is very dense and creates a lot of air resistance. 

Pure Air Systems has been making HEPA based, fan powered air filtration systems since 1985 and has a number of HEPA filter systems that are designed for residential, commercial, institutional and medical applications. Their portable unit is certainly one of the best on the market for reduction/removal of harmful airborne particulate including bacteria and some viruses. Their systems can be attached to existing HVAC units or used as stand-alone systems. 

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

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Air Filtration

For those people who live and work in colder climates, the amount of time you spend indoors is proportionally more than those individuals who live in warmer climates. In addition colder air is much drier than warm moist air and as a result dust particles and other airborne contaminants tend to stay suspended in air for much longer periods of time.

As humans we inhale large quantities of air every time we take a breath. All of that air is filtered through our mucus membranes and lung linings and a large portion of the particulate are ( those particles larger than 20 microns ) air filtered out and most often projected out of the body when exhaling.

The smaller particles, those under 20 microns and especially those sub-micron particles, are trapped in the lung linings and not exhaled. They are absorbed by the body and then flushed out of the body. However, some of those particulate may be harmful to the body and these may be airborne viruses or bacteria or perhaps some other type of airborne contaminant. Collecting these particulate is what Pure Air Systems does with their HEPA based air filtration systems.

Started in 1985, Pure Air Systems created a line of Air Filters that specifically used true, commercial grade, scanned HEPA filters in all their systems. HEPA filters are the most effective mechanical device for removing 99.99% of all particles 0.3 microns or lager and approaching 99.98% at particles as small as 0.12 microns in size.

These HEPA systems are all fan powered and use the newer ECM variable speed drive motors so they can be used on 120/240 volt 50/60Hz electrical systems and used any where in the world.

The systems range in capacity from 50 CFM ( Cubic Foot Per Minute) up to 2,000 CFM. They can be used either attached to an existing ducted HVAC system in the by-pass configuration or as stand-alone units. These Air Filtration systems can be used in residential, commercial, institutional, medical and industrial applications.

For more information on the complete line of HEPA 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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Particulate Removal With HEPA Filters

The process of removing airborne contaminants that are small enough to potentially cause respiratory dysfunctions is somewhat challenging. For the most part particulate removal with standard air furnace type filters is effective on larger, visible particles many of which are aspirated in and then expelled out of the lung systems.

Sub-micron sized particles, those that are less than 1 micron in size, are easily aspirated into the lungs and much of this particulate will stay logged in the lung linings or mucus membranes. This is why particulate removal with HEPA filters is so necessary especially in where airborne allergens and harmful bacteria and viruses are present.

Originally designed during the development of the Atomic Bomb in Los Alamos, New Mexico, HEPA filters have progressed to include filter medias that are more effective than the 99.97% at 0.3 microns. Today there are SULPA filters that have an efficiency of 99.99995% at 0.12 microns. These are the types of filters used in Class 10 clean rooms where micro-chips are manufactured.

Pure Air Systems began using HEPA filters for particulate removal in 1985 in their first system, the Model 600H. This fan powered HEPA based air filtration system could move up to 600 CFM of HEPA filtered air. Today, PAS makes 6 other HEPA based models including a portable HEPA unit capable of moving from 10 CFM to 250 CFM using the newer ECM motors. The largest system, Model 2000HS Plus moves up to 2,000 CFM of HEPA filtered air.

Over 70 years ago the HEPA filter was born to protect the technicians from beta particles produced during the design of the bomb. Today, particulate removal with HEPA filters is considered the best method for protecting us from harmful airborne contaminants.

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 contact us on  our toll-free number at: 800-869-8025.

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Isolation Room

Isolation is a word that means to separate from or detach from another area in all aspects. Isolation rooms are used often in the medical market to maintain a safe environment from the general public by isolating a dangerous or highly communicable diseased patient from the the general population.

Isolation is more than just separation by walls and doors. In the realm of airborne viruses you require a special filtration method to ensure that any air that is passed between the isolation room and the outside world is properly filtered. This is always done using HEPA based air filtration systems to remove even the smallest airborne particles to eliminate the possible transmission of deadly diseases.

Pure Air Systems has been providing commercial grade, certified HEPA and ULPA filters for a wide range of applications and markets since 1985. HEPA filters have been the only true mechanical filter type that has the ability to absolutely trap the airborne allergens and pathogens that are associated with creating serious illnesses and health issues since the early 1980’s.

Pure Air Systems also makes HEPA systems that can be used in the residential, institutional, commercial, industrial and military markets. After 32 years of being in business Pure Air Systems has well over 10,000 units in the field in both the US and overseas.

Seven different models are available from fan powered air volumes starting at 50 CFM to 2,000 CFM. All the systems use the new variable speed drive motors and they are all rated at, 120/240 volt, 50/60 Hz so they can be used anywhere in the world.

The all metal housings and commercial grade components ensure that these systems will provide high performance service over very long periods of time.  For more information on the complete line of HEPA and Carbon based 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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