Delta P. The reason you have dust in your house.

With a few exceptions, most homes in the U.S. use some form of ducted heating/cooling system with air returns and registers located throughout the rooms in the house. The central air handler moves air from the returns back to the cooling and heating coils and then moves it back  into the house to either heat or cool the indoor environment.

On the return air side of the air handler where all the returns merge at one point is where the air filter is located. The filter is designed to remove all the airborne dust and dirt that is in the air. Only dust particles in the air that are pulled into the return air grills will be filtered. If the dust particles are too heavy to be airborne they will remain at rest on a surface and never reach the filter.

The HVAC unit in your home is a balanced system. It is designed so that there is slightly more air moving than returning. This helps to keep the house in a positive pressure mode which eliminates in-leakage of cold or hot air. The balance also includes the ability of the blower/motor to move the air throughout the duct work as well as through the air filter. The air ducts and filter all have a resistance known as Delta P or pressure drop. The higher the pressure drop or static pressure the more powerful a blower/ motor will be required.

If the air pressure is balanced with a clean air filter, once the air filter starts to load up the resistance or pressure drop across the filter ( Delta P ) will increase. If the Blower/Motor is not properly sized as the Delta P increases the air flow across the air handler decreases. Once this takes place the amount of air and amount of airborne dust that is in the air will be significantly reduced and you end up with the air handler running more often just to keep the house cool or warm and more dust in the environment.

This is one reason why you need to change your air filter at least once every 6 months and more often if you live in an urban area. For more information on air filtration and how it works please go to our website at: http://www.pureairsystems.com  or call us on our toll-free number at: 800-869-8025.

Cigarette Smoke Removal

I have written over 100 articles and blogs on the subject of removing cigarette smoke and odor from any indoor environment and the resolutions we have today are the same as those proposed 30 years ago.

The best and most effective method of removing smoke from the indoor environment is to eliminate any smoking in indoor environments. It’s just that simple. Removing it using air filtration, air dilution, carbon filters and high volume fans is only a band-aid approach at best.

Once the cigarette smoke sticks to any surface it will re-release that odor for days. It requires a strong solvent based cleaner to remove the brown tar material that is present on the walls of a smoking environment.

Pure Air Systems has been around since 1985 producing high capacity, commercial grade, certified HEPA and Carbon based fan powered air filtration systems for the residential, commercial, institutional, medical and industrial market place. Many of these systems were sold for the exclusive purpose of removing cigarette and cigar smoke from indoor environments.

The degree of effectiveness of the systems was directly proportional to how much smoke we could remove at the source over time. And, the cigarette smoke will clog up a prefilter in two to three weeks and the HEPA filter in less than 3 months. The Carbon media in the units which is designed to remove much of the odor, would last perhaps 4 to 6 weeks at best. In essence, it is very expensive and difficult to remove the cigarette smoke and odor with any degree of effectiveness.

It is for this reason that smoking is prohibited from most buildings, hospitals, schools, airports, planes, trains and ships. Aside from the environmental issues smoking is also extremely harmful to your health.

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

Air Filtration For Your 3D Printer

For five years I have been working with 3D Printers of all types and have printed with over 20 different filaments from PLA to PETG and even Bronze. Some of these filaments when heated to over 205 degrees C to melt them for extrusion give off no noticeable odor Some, like ABS, Polycarbonate and Nylon do emit an odor. Often  a very strong odor.

It is also known that some measure of small sub-micron sized particles are released during the printing process as the extruder moves the heated filament from the nozzle to the build platform. Gases and particulate that are, perhaps,  benign in small quantities but potentially harmful in large quantities or over long terms of exposure.

Pure Air Systems along with its partner, LiteWorld LLC , have developed a plexiglas enclosure with two large access doors that will fit over most large bed 3D printers allowing for two benefits. First, the enclosure has a fan and carbon media filter to capture any odors that might be produced by the materials during the printing process. Second, the unit will significantly minimize the amount of fine airborne particles that are emitted during the printing process.

Air filtration for your 3D printer is perhaps something you don’t think about but it should be on your radar at this point in the evolution of 3D printers. Especially the FDM or FFF printers that use filament in the 1.75 mm or 2.85 mm size range.

The other reason for the use of the enclosure is the safety it provides in keeping little hands out of the moving mechanisms and from the very hot nozzle and build platform. Many schools are now requiring the use of an enclosure to fit over the printer to keep them free from any liability when used in the classroom.

For more information on the complete line of air filtration systems from Pure Air Systems please go to our website at: http://www.pureairsystems.com or call us at 800-869-8025. Or you can go to http://www.liteworldllc.com  for more information on the enclosure.

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: http://www.pureairsystems.com  or call us on our toll-free number at: 800-869-8025.

HEPA For Terrorism

We are constantly reminded that we live in a era where anyone at anytime can create mayhem with simple, exotic or well crafted killing tools. There are no limits as to what device a motivated anarchist can do with any of these style devices. Yet, for all the external damage that can be done with hard technology, the invisible, airborne pathogen still creates the greatest threat.

Tiny viruses and bacteria are invisible to the naked eye but can be a major threat to our bodies if these pathogens are inhaled, absorbed or injected into our systems. The only true method of totally removing these objects is to use a mechanical filter such as HEPA. High Efficiency Particulate Air filters have been around since 1940 but their real push into the market came in the late 70’s and early 80’s with the development of the micro-chip.

As HEPA technology improved the types of HEPA paper and testing methods became more effective especially as organizations like the CDC began to work with some really horrible contagions and had to isolate them in special rooms with multiple levels of HEPA filters including the newer ULPA (Ultra Low Particulate Air ) and the new SULPA (Super Ultra Low Particulate Air) filters.

In 1985, Pure Air Systems came onto the market offering true, commercial grade, fan-powered HEPA air filtration systems. This was the first true entry of commercial grade HEPA units into the residential market place. Over the years a total of 7 HEPA systems were produced by PAS and the incorporation of the new ECM motors allowed them to create models that had variable speed motors and that could be sold anywhere in the world.

These systems are considered some of the best HEPA filtration systems in the world and have been used in applications where the facility is being prepared to protect against biological attacks. There is no better filter for removal of harmful airborne pathogens than HEPA.

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

Stand-Alone Air Filtration Systems

Air filtration systems for both residential and commercial applications come in a variety of types and performance packages. Depending upon the type of particulate or gaseous pollutant that needs to be removed, the filter media used in the air filtration systems can be general duty filters or high efficiency filters such as HEPA media.

Stand-Alone units mean just that. They are units that incorporate a blower/motor system that is capable of pulling air from an area and pushing air out to the environment or other area. These systems can range in volumes of air moved ( as measured in CFM, or cubic feet per minute ) from a low of 50 CFM to 2,000 CFM and higher.

Pure Air Systems has been making HEPA based, fan powered, commercial grade, stand-alone units since 1985. These systems use the newer ECM Variable Speed motors that can be automatically or manually adjusted to produce various ranges of air movement (CFM). This feature makes the units more viable for a multitude of applications using one system.

Pure Air Systems offers 7 different variations of their Hepa Shield Plus units including a small, powerful portable unit for laboratory type applications. Each unit has a dual-layer prefilter, carbon media and true HEPA filter. These are all commercial grade filters and are designed for even the most difficult of pollution control applications.

PAS stand-alone systems can be mounted on a wheeled cart or platform and moved from location to location. The S versions have threaded nuts in the top section so they can be mounted from a ceiling using threaded rod. The units come in 1/3, 3/4 and 1 HP versions and all the motors are rated, 120/240 volt , 50/60 Hz so they can be used anywhere in the world.

For more information on the complete line of HEPA and Carbon based stand-alone 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.

Pollen Season Is Coming – Time For HEPA Filters

Now that February is here, Spring is just around the corner and with the warmer temperatures and rain comes the new production of grass, tree and ragweed pollen. Allergies to airborne pollen and other airborne allergens is actually more challenging in many ways than fighting off a cold or the flu which can last from a few days to a week.

A person suffering from airborne pollen will have to endure the process for many weeks and even months in some cases. And, the allergy medicine primarily helps relieve some of the symptoms but at a very minimal rate. The only true way to remove yourself from the airborne pollen is to…well remove yourself from the airborne pollen.

Pure Air Systems has been making and selling HEPA based, fan powered air filtration systems since 1985 and is now one of the leaders in high performance HEPA air filtration systems.

PAS has a method of attaching any of their HEPA systems to an existing, ducted HVAC system or the systems can be used as stand-alone units. This means you can have commercial grade, certified HEPA filters continuously filtering the air in your home, office or work place and in addition the systems can be used to slightly pressurize the area to totally eliminate the potential for any infiltration of outdoor particulate.

Thousands of these systems have been sold over the past 32 years and for those individuals who have used the 600HS, 1200HS or 2000HS PAS systems their issues with allergies due to pollen and other airborne particulate have been reduced to the point where they have little or few symptoms.

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