Indoor Air Quality Guide

Indoor air related problems are constantly increasing


There is a growing public awareness and knowledge about poor indoor air quality and its alarming health effects.


Hundreds of community health studies have linked daily increases in fine particle pollution to reduced lung function, greater use of asthma medications, and increased rates of school absenteeism, emergency room visits, hospital admissions, and even tens of thousands premature death each year. Fine particle pollution is especially harmful to children, elderly and people suffering from lung and cardio vascular diseases such as asthma, COPD, artery disease and congestive heart failure. In America alone 20 million people suffer from asthma and 50 million from allergies.
In the last couple of years, scientific evidence has indicated that it is actually the indoor air that is a major health threath being seriously more polluted than the outdoor air in even the most industrialized cities. As people are known to spend approximately 90% of their time indoors, the health risk may be severe.



In conjunction with the European Respiratory Society Congress (ERS) in Stockholm in 2007 WHO published a report stating that one billion of the world’s inhabitants now have chronic lung diseases and that by 2020, these will be the world’s greatest cause of death. This applies to pulmonary infections such as tuberculosis as well as lung cancer and chronic obstructive pulmonary disease (COPD), plus a range of respiratory diseases such as asthma and diseases involving defective breathing regulation, like sleep apnea and sudden infant death. Whilst the incidence of many other major disease groups is declining, lung diseases are on the increase! (DN )



It is all about small particles


Small particles, below the size of 2.5 micron (PM2.5) and even more below 1 micron, are inhaled more or less deeply into our lungs and enter our blood stream bringing also other substances into our body. Today this is considered to be a major cause of heart and vascular diseases as well as different forms of cancer.

A number of different lung problems are caused by the same small size particles. During the last couple of years it has been proven that allergic and asthma reactions have become 10 -100 times more aggressive in combination with breathing such small soot particles, mostly from combustion of fossil fuels, which are the great majority of particles in the air today (see enclosed report). And it does not have to be simultaneous.

Fine, ultrafine and nano particles cause almost all the health problems from particles in the air according to scientific evidence during the last years. Not even the allergy organisations seem to be fully aware of this yet. E.g. they still consider pollen and mould spores to be major causes which is both true and false. Air cleaning of pollen is like trying to suck in basket balls into a vacuum cleaner. Pollen are huge particles but they contain allergens which come lose when pollen break apart and become ultrafine particles mostly containing allergens, i.e. proteins/albumins.

Health problems caused by mould are most probably not caused by rather large sized mould spores. It has been proven over the last 4-5 years that different kinds of mould continuously generate large quantities of ultrafine particles containing mycotoxins which are among the most potent poisons in nature. This is the major cause of mould sickness. 

Thus, the smallest particles, which are everywhere in enormous numbers and which are “floating” for very long periods of time in the air, are proven to cause most of the different health problems and even more so in combination with different allergens. Reducing the concentration of such small particles in the air has a positive effect on our health. This can be accomplished by using high performance air purifiers provided however that they are in continuous operation as air quality is extremely volatile.



Why do you need an air purifier?


We breathe 20 000 liters of air every day. The air is full of particles that derive from different sources in our society. The majority of these particles are so small that they can actually enter our blood stream.
An air cleaner is useful in many areas in our society, from households and offices to hospitals, laboratories and industries. Each market has one thing in common; they need to improve the indoor air quality (sometimes even make it sterile). LightAir will in time meet the demand for all air cleaning markets. Below is a comprehensive explanation to why the indoor air is polluted, the effect it has on our health, and what we can do to improve it.


There are four main reasons to why we need an air purifier: 

  • The indoor air quality is worse than the outdoor air, even in the most industrialised cities. We spend approx. 90% of our time indoors. 
  • Polluted air is harmful to your health and can cause symptoms such as asthma, allergy, heart & vascular decease, fatigue, nausea, headache, respiratory decease and more. 
  • The indoor air lack negative ions, the air’s natural vitamins. 
  • Polluted air cost you and the society health, time and money



What pollutes the indoor air?


The outdoor air – through the ventilation system enters exhaust fumes, pollution from industries, mould, allergens, pollen, radon, pesticides, micro/nano particles, etc into the house or premises. 
Construction material – can secrete poisonous gas (radon), raw material, asbestos-containing insulation, wet or damp carpet, and furniture etc. It can also collect particles, bacteria, virus, mould, etc. These are a few of the effects that go under the name “Sick Building Syndrome” (SBS). Other pollutants are products for; central heating and cooling systems and humidification devices. 
The human being – leaves remains from skin, hair, fibre & dust from clothes, dirt from shoes, etc. Furthermore we pollute more by smoking, cooking, lighting fires, keeping pets, household cleaning and maintenance, personal care and hobbies. 
Oxygen ions – human activities and pollution generates positive charged ions, which result in an unnatural imbalance of ions, which has been proven to cause health problems.



Why is indoor air more dangerous than the outdoor air?


Most buildings constructed during the last 60 years have integrated complete ventilation systems (mechanical supply & exhaust air). It has been necessary because of the size of buildings and due to tighter and better insulated construction materials. All such buildings function like large vacuum cleaners whereby we spend most of our time in the filter bag i.e. indoors an absurd situation but unfortunately the truth. The indoor climate also creates a friendly environment for bacteria, fungus and virus to grow in.


The indoor air quality is in general proven to be 4-5 times worse than the outdoor air because most ventilation  can not handle the large amount of fine particles and the systems are often also malfunctioning as a result of:


  • complete isolation (especially in countries with changing climate), which decrease the natural ventilation. 
  • ventilation ductwork systems have been found to be dangerously dirty inside preventing airflow and balance. 
  • only a fraction of the air particles get stuck in the supply air filter system, the rest pass on straight into the building. 
  • the exhaust system is unable to efficiently handle the extraction of particles partially because they have a certain weight.
  • bad situated supply air, for example too close to car exhaust fumes, restaurant exhaust, industry exhaust. 
  • exhaust air is situated to close to the supply air, which means that the air the just went out comes back in again. 
  • temporary turn-off of the ventilation system during the night (to save money) expose the filters and the ventilation systems to evaporation, which creates a living friendly environment for fungus, bacteria, virus, and mould. These microbes are in the morning pushed into the building when the ventilation system is turned on. 
  • the supply filter is changed too seldom, which results in the filter becoming a living environment for microbes that are constantly pushed into the building. 
  • mechanical exhaust have been shown to cause pressure, which makes polluted air to be sucked into natural chinks and holes in the isolation and ground. 
  • there are regulations and standards almost everywhere for minimum fresh air supply, these standards are however in general never met.



Why is the balance of ions important?


In a healthy environment approximately two thirds of the ions should consist of negative ions. Humans and our environment generate positive ions and create an unnatural balance of ions. For example at a waterfall it circulates about 50,000 negative ions/cm3 and at an office it circulates about 20 negative ions/cm3. Common sense tells us that the environment at a waterfall is healthier than the one at an office.

The balance of ions is also connected to the number of particles you find in the air including bacteria, virus, allergens, etc. Since particles generally are charged positive negative ions work as natural air cleaners by attaching themselves to positive charged particles. These will thereafter cluster and become heavy and fall out of the air or get attracted to positive charged spaces.


Learn more about negative ions HERE






Consequences of polluted indoor air


Health problems:

After studies of people who have been exposed to SBS (Sick Building Syndrom) or other polluted environments it has been clear that a polluted environment is the cause of the following symptoms:

  • allergy
  • asthma 
  • irritation in eyes and throat 
  • cardio and vascular decease 
  • respiratory decease 
  • fatigue, concentration difficulties, headache, irritation, depression 
  • virus and bacteria attacks


The consequence of these symptoms is long-term sickness and absence from work and school as well as an enormous cost for the society (the estimated cost on the society in Sweden from only asthma is approx. 4-6 billion Swedish kronor/year). There are urgent problems in the hospital industry where there is a continuous losing battle against resistant bacteria and virus infections.


Industrial problems:

Many industrial procedures have problems with particles in the air. These are directly functional problems causing production and quality problems or storage losses in the hospital industry, the food and pharmaceutical industries, the electronic industry, paper and photo industry and in many other industrial processing situations.


How can I improve my indoor air environment?


It is unfortunately not as simple as open your window and let in some "fresh" air, especially not if you live in a big city. The outdoor air in cities is dangerous and should pass through the ventilation system before entering. A good advice to solve air quality problems in apartments, homes and offices, involve actions like eliminating or controlling the sources of pollution, increasing and maintain ventilation systems, and installing air purification devices.

















About negative Ions



Negative ions are Positive.

Our modern homes and offices seal out negative ions forcing us to live in unhealthy environments. Computer terminals, fluorescent lighting, forced air ventilation systems, and modern building materials generate an over abundance of positive ions. Positive ions make us feel tired, depressed and irritable. Balancing the ionization in your home and workplace may help you live a healthier life. The worlds most tranquil and refreshing regions are loaded with billions of negative ions. Air near waterfalls, mountains, beaches and forests are among those places where ionization levels are the highest and in complete and natural balance.


What are negative ions?


Ions are molecules that have gained or lost an electrical charge. Negative ions are created in nature as air molecules break apart due to sunlight, radiation, and moving air and water. They are odorless, tasteless, and invisible and we inhale them in abundance in certain environments. For example you may have experienced the power of negative ions when you last set foot on the beach or walked beneath a waterfall or immediately after spring thunderstorms. The Niagara Falls are said to be the healthiest place on earth!



How does negative ions interact with the body?


The human body is surrounded by ions, both positive and negative; therefore, the function of electrons inside and outside the cells has significant influence on the human body. We take in negative ions through our skin and lungs transporting it to the entire body through the blood. Negative ions prevent acidification of the blood, which is caused by the loss of electrons. Being in an environment rich of negative ions therefore improves the body’s immunity and resistance to illness. Metabolism is the process of acquiring nutrients from the blood and excreting waste out of the body, which is extremely important to the human cells. The more negative ions there are in the blood, the more efficient the cell's metabolism process. On the contrary, the more positive ions there are in the blood, the slower and less efficient the cell's metabolism. This causes the body's cells to become weak and the body will tend to get sick more easily and aged faster. Generally speaking, negative ions increase the flow of oxygen to the brain; resulting in higher alertness, decreased drowsiness, and more mental energy.

Negative ions are beneficial to human body in four major ways:

(Reprinted from "Economy Daily News" - January 30, 2002)

  • Strengthen the functions of autonomic nerves
  • Reinforces collagen (tissues that are resilient and tension-related)
  • Improves the permeability of the cell's prototype plasma membranes (improves metabolism)
  • Strengthens the body's immune system

Negative ion regeneration for youthfulness and longevity:

(by John Heinerman, Ph.D)

  • Negative ions neutralize pollutants and provide positive effects on health to stimulate the reticulo-endothelial system, a group of defense cells in our bodies that marshal our resistance to disease.
  • Act on our capacity to absorb and utilize oxygen. Negative ions in the bloodstream accelerate the delivery of oxygen to our cells and tissues and
    speed up oxidation of serotonin in the blood. This is well known to have far reaching effects on mood, pain relief and sexual drive.



What are the proven health effects of negative ions?


Scientific studies have shown that atmospheres charged with negative ions relieve hay fever and asthma symptoms, seasonal depression, fatigue and headaches. It's also been shown that negatively ionized atmospheres improve performance of voluntary movement, increase work capacity, sharpen mental functioning, and reduce error rates.

Studies at Columbia University and the New York State Psychiatric Institute have demonstrated that High Density Negative Ionizers appear to act as a specific antidepressant for patients with seasonal affective disorder (SAD), but without the side effects of antidepressants such as Prozac.

Remarkable as it may seem, a room charged with negative ions was shown to stem bacteria growth and precipitate many airborne contaminants including pollen, dust and dust mites, viruses, second-hand cigarette smoke, animal dander, odors and toxic chemical fumes.


Other benefits in short.

  • Asthma, allergies, and other respiratory problems: Many scientific studies have been conducted over the years (mostly in Europe and Russia) showing how exposure to high levels of negative ions drastically or significantly reduce asthma and allergy symptoms, as well as respiratory-related illness.
  • Migraine Headaches: Inhaling negative ions regulate the production of serotonin inside the brain. The overproduction of serotonin inside the brain is the cause of migraine headaches.
  • Depression: A study at Columbia University suggested that negative ion treatment is more effective than anti-depressant drugs such as Prozac and Zolof, and there are no side effects with negative ions.
  • Fatigue: The overproduction of serotonin (chemical produced inside the brain) also causes fatigue, and negative ions regulate the production of serotonin inside the brain.
  • Sleep: A study in France found that negative ionizers helped people to sleep better, by regulating the production of the chemical serotonin in the brain.
  • Mental Performance and Concentration: Several tests have shown people exposed to negative ion treatment perform much better in mentally-oriented activities than those who are not.
  • Physical Performance: Due to test results performed by Russian scientists, negative ionizers were always installed in the locker rooms and resting places for the Russian athletes.
  • Burns: Studies performed in one hospital found that burn patients were far more likely to recover more quickly and thoroughly



Negative ions and beauty

According to a study conducted by Dr. Arudoman of Germany negative ions helps to reinforce collagen. Collagen is tissue that is resilient and tension related. In his study he noticed that the pores and the sweat glands of the skin expanded, which demonstrate good metabolism of the cell membranes. This phenomenon is called Prototype plasma membranes of dermal reflectivity. More and more health and beauty related products include negative ions in their treatment. Today you will find facial massagers, facial and hair moisturizers, blow dryers, etc all equipped with negative ions. It is foremost the increased blood circulation and the above explained reinforcement of collagen that are said to diminish wrinkles and make skin supple that makes these products popular.



Negative ions and Lightair IonFlow 50 air purifier.


Lightair IonFlow 50 air purifier differentiate itself from other ionizers on the market by being able to generate an extremely high amount of negative ions without producing ozone as a bi-product. Ozone has always been a side effect of ionization meaning he higher ion generation the higher the ozone level. This has resulted in inefficient ionizers in order to respect the threshold value of ozone.

Another vital difference is that the IonFlow 50 uses a positively charged collector that efficiently collects the negatively charged particles in the air, essentially acting as a large magnet for particles. Most other ionizers let the particles drop to the floor.

The amazing thing with the IonFlow 50 is that thanks to its capability to generate an high amount of negative ions it attain the same efficiency as the best HEPA filter based air purifier, but without the noise, high energy consumption and expensive filter change. Add all the amazing benefits of negative ions and you have the ultimate health product! Lightair IonFlow 50 offers an unbeatable combination of efficient, silent, filter-free, ozone free, energy saving and easy to use, economical operation that is at home in any environment.





Studies Proving the Effectiveness of Negative Ions


Negative ions help prevent respiratory-related illnesses.

In a study conducted in a Swiss textile mill, negative ionizers were placed in two, 60' by 60' rooms, each containing 22 employees. In one room, the negative ion electronic air cleaner was turned on during the course of the study. In the other room, the negative ion air purifier was permanently turned off, although the employees in this room were led to believe they were working in a room enriched by negative ions. During this six-month study, a total of 22 sick days were lost by employees working in the room in which the negative ionizer was operating. In the room where the machine
was not operating, a total of 64 days were lost to sickness. During a month-long flu epidemic, the first group lost a total of 3 days to sickness, while the second group lost a total of 40 days to sickness (Stark, 1971).

In a test involving a Swiss bank office, one group of 309 worked in a negative iontreated environment. A second group of 362 worked in an untreated environment. Over the next several months, for every day lost to respiratory illness (cold, flu, laryngitis, etc.) in group one, 16 days were lost to respiratory illness in group two (Soyka, 1991).

In a Surrey University study at the Norwich Union Insurance Group headquarters, eight negative ion generators were placed in the computer and data preparation section. Before the test, the research team spent a month compiling incident rates for complaints of sickness and headaches. During the test in which the negative ion air purification systems were in operation, incidents of sickness and headaches were reduced by 78%. After testing was completed, the Norwich Union opted to keep the negative ion electronic air cleaners (Soyka, 1991).


Negative ions counteract the effects of smoking.

High levels of negative ions neutralize the effect that tobacco smoke has on the cilia. Cilia are the microscopic hairs located in the trachea that move rapidly back and forth to prevent pollutants and toxins from traveling into the vulnerable areas of the respiratory tract. The faster the cilia move, the more effective they are. However, tobacco smoke slows down the ciliary beat, diminishing the body's ability to keepcancer-causing pollutants from entering the depths of the respiratory tract. Tests have shown though, that adding high levels of negative ions to the air accelerates the ciliary beat to normal levels (Soyka, 1991).


Negative ions are a natural anti-depressant without the side effects!

In a study conducted by Columbia University, 25 people with SAD (Seasonal Affective Depression) sat in front of a negative ion air purifier for a half hour every morning for a month. Half the subjects were given a low level of negative ions, and the other half a high level. The higher level of negative ion treatment proved to be as effective against SAD as antidepressants, such as Prozac and Zolof, and without the side effects of these drugs (Finley, 1996).

Negative ions for a positive attitude.

Positive ions, which are found in abundance in most indoor environments, cause an overproduction of serotonin. Serotonin is a neurotransmitter that helps the body deal with mental, emotional, and physiological stress. An overproduction initially causes hyperactivity, which rapidly leads to anxiety, and in some cases depression. Negative ion treatment has proven to be successful in reducing the overproduction of serotonin, and therefore successful in alleviating depression in some cases (Kreuger, 1957).

Negative Ions help us to sleep better.

In 1969, French researcher found that the overproduction of the neurohormone serotonin caused sleeplessness and nightmares. In using a negative ion electronic air cleaner to treat a group of people experiencing sleeping problems as a result of serotonin overproduction, he found that most of them were able to sleep better (Soyka, 1991).

U.S. Dept. of Agriculture

A recent study by the U.S. Dept. of Agriculture found that ionizing a room led to 52% less dust in the air, and 95% less bacteria in the air (since many of the pollutants found in the air reside on floating dust particles).

The U.S.D.A. also performed another study to test the effectiveness of negative ionization at removing airborne Salmonella Enteritidis. The negative ions drastically reduced the airborne salmonella particles, prompting the following statement from the USDA: "These results indicate that negative air ionization can have a significant impact on the airborne microbial load in a poultry house and at least a portion of this effect is through direct killing of the organisms."

Good Housekeeping Magazine

In March of 1999, Good Housekeeping Magazine had its engineers test an ionizer by using a smoke test, and found that it cleared out the smoke in a tank.

Agriculture Research Service (of USDA)

The Agriculture Research Service of the U.S. Dept. of Agriculture tested the effectiveness of ionizers for removing dust in a poultry hatchery. The dust level is very high in such an environment. In this study, the use of an ionizer resulted in dust removal efficiencies that averaged between 81.1 and 92.2%. The airborne transmission of salmonella (to the eggs) was also significantly reduced as a result.

Journal of Hygiene

Scientists showed that ionization reduced bacterial levels in burns and plastic surgery units by over 96% after a two week period, which results in much better and more rapid healing of patients.

Journal of Applied Microbiology

The use of negative ions was even found by scientists to reduce the presence of airborne viruses by about 40%. A study featured in the 1987 issue also showed the negative ions are free from any adverse side effects.


A 1976 study featured in this publication provided evidence that negative ions can have a biologically lethal effect on airborne microorganisms.

Journal of Hygiene

A 1979 study found that using negative ionization in the air protected chickens from airborne infection of the deadly Newcastle Disease Virus.

Journal of Food Protection

A 2001 study found that airborne negative ionization was highly effective at destroying airborne and surface salmonella.

University of Medicine and Pharmacy (Romania)

A test on male rats showed that just moderate levels of negative ions increased the resistance of the rats, reducing or eliminating the effect of some chemicals.

Effect of Negative Ions on Drivers

A study by Toyota Central R & D Labs, Inc. found that negative ions can improve fatigue and cognition of drivers.

Negative Charged Ions are Effective in Treating Cancer

(Cited from High-Voltage Treatment published by Youth Publishing) In 1950, Dr. Haskell applied Negatively Charged Ions to patients of Hypertension. Amazingly, Negative Ions were proven to have a positive effect in lowering one's blood pressure, while no beneficial effects were observed with Positive Ions. Negative Ions are also effective against influenza, asthma and especially bronchial disease. Another study done by the University of Frankfurt involved a "Cancer Team" in order to further study the physical effects of Negative Ions to cancer cells. Different types of cancer cells were transfused into the bodies of mice. In order to have a base of comparison, one group of mice were put into a negative ion environment each day while the other group remained untouched. As a result, the mice in the negative ion environment lived, on average, for 59 days, while the mice that were untreated lived no longer than 34 days. The mice from the experimental team lived 25 days longer; some even lived as long as 80 days! The experiment's result confirm the effectiveness of

Negative Ions in treating cancer.

"Negative Air Ions Stimulate Mitochondria" Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, Russia.



Articles & Fact sheets

Facts & Figures



Facts & Figures

  • In the WHO European Region alone, exposure to particulate matter (PM) decreases the life expectancy of every person by an average of almost 1 year, mostly due to increased risk of cardiovascular and respiratory diseases, and lung cancer.
  • Some 40 million people in the 115 largest cities in the European Union (EU) are exposed to air exceeding WHO air quality guideline values for at least one pollutant. Children living near roads with heavy-duty vehicle traffic have twice the risk of respiratory problems as those living near less congested streets.
  • Indirect effects of air pollution, such as climate change, are becoming increasingly evident. Transport is the fastest growing source of fossil-fuel emissions of carbon dioxide (CO2), the largest contributor to climate change.
  • Ozone pollution causes breathing difficulties, triggers asthma symptoms, causes lung and heart diseases, and is associated with about 21 000 premature deaths per year in the Region.
  • Indoor air pollution from biological agents in indoor air related to damp and mould increases the risk of respiratory disease in children and adults by 50%.
  • Second-hand smoke causes severe respiratory health problems in children such as asthma and reduced lung function. It also causes lung disease, cardiovascular diseases, cancer and premature death in adults



Source: World Health Organization (WHO)





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