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Frequently Asked Questions

Negative Ions
1. What are negative ions?
2. What are the benefits of negative ions?
3. Negative Ion Facts
4. How do negative ions remove pollutants from the air?
5. Why negative ions and low-level ozone?

6. What is Ozone?
7. Is Ozone Safe?
8. What are the benefits of Ozone?
9. How does ozone work?
10. Ozone Levels and their Effects
11. Typical Applications of Ozone include:
12. Is excessive Ozone harmful to your health?
13 .Does Heaven Fresh air purifier generates excessive Ozone?
More information and research articles about negative ions and ozone..........
 HEPA Filter
14. What is HEPA filter?
. How can Heaven Fresh air purifier purify the room without a filter?

Other Questions
16.  How much is the electricity cost for Heaven Fresh air purifier?
17. Are there any negative effects using Heaven Fresh air purifier?
How does Heaven Fresh air purifier compare in cost to the other air purifier?
What is Black Wall or Gray Wall Effect?
Does Heaven Fresh air purifier have Black Wall effect?
Does Heaven Fresh air purifier produce noise?
How much is the maintenance cost for Heaven Fresh air purifier?
23.  How do I choose the right air purifier for my room?
24. Pollutants Removed

1.What are negative ions?
There are positive and negative charges in the air. Integration of positive charge and ion form positive ions and that of negative charge and ions form negative ions. Too many positive ions will leave you feeling depressed, lethargic, headache and more. Discharge of a high-voltage-exerted pin electrode is able to produce voluminous negative ions. And these negative ions are able to attach themselves to airborne toxins and remove the pollutant from the air.

2.What are the benefits of negative ions?
Remove bacteria, vitalize our cells, increase the oxygen holding capacity of blood, improve metabolism, improve alertnerss, remove fatigue, boost resistance to disease, have a substantial healing effect on headache, insomnia, constipation, allergy, asthma and more.

3. Negative Ion Facts
  • Approved by the U.S. FDA (Food & Drug Admin.) as an approved allergy treatment.
  • Ionization is mandatory in many European and Russian Hospitals.
  • 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.
  • 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).

4. How do negative ions remove pollutants from the air?

How negative ions workHow negative ions work

Negatively-charged negative ions attach themselves to contaminates and allergens, which are positively-charged. The newly-formed larger particles are then able to fall to the ground, and out of the air we breathe.

Most floating contaminates and allergens are positively charged, and of course, negative ions are negatively charged. In environments where high densities of negative ions exist, they are able to reverse the charge of floating contaminates to a negative charge.

This results in a magnetic attraction among the floating pollutants in the air, causing them to aggregate, or clump together.
As a result, they become too heavy to remain floating in the air, and fall harmlessly to the ground, where they cannot find their way into your respiratory tract.
At this point, even if they are inhaled before falling out of the air, these now larger particles are able to be intercepted by the "filters" of the upper respiratory tract, due to their increased size.
Of course, without a continual generation of negative ions, some of these enlargened pollutants can find their way back into the air. Heaven Fresh air purification systems are designed for continual use, ensuring pollutants stay out of the air you breathe.
Some studies suggest that negative ions also have a biological effect on bacteria and viruses, killing them on contact in many cases.

5. Why negative ions and low-level ozone?
Negative ions and ozone are natures most powerful air-cleansing agents. There is nothing in the world more effective in taking allergens and contaminates out of the air we breathe. Unfortunately, due to the tight construction of todays homes and buildings, they are unable to take effect within indoor environments.
Negative ions and ozone are created by nature, and found at their most optimal levels where the air is most pure and healthy. These places typically include up in the mountains, near waterfalls, where lightning has just occurred, in open meadows away from "the city", and the ocean shore by the crashing waves.

6. What is Ozone?
An ozone is formulated by combination of an oxygen molecule (O2) with an oxygen atom (O), which is freed by ultraviolet radiation in sunshine or produced by high voltage of lighting. Most ozone exists in the woods and on seashore. Ozone is an inflammable and easily water-soluble gas, with no color and no poison. In thin concentration, it has a specific grassy smell of the refreshing air near a forestry or beach. In high concentration, it has an irritating pungent odor. When Ozone (O3) reduces into Oxygen (O2), an oxygen atom (O) becomes free. And this oxygen atom (O) is chemically active and have very strong oxidizing, disintegrating and neutralizing ability, three thousand times more powerful in killing bacteria than chlorine.

7. Is Ozone Safe?
Although some groups claim that ozone is harmful, proof of its safetiness and usefulness at moderate concentrations have prevailed in hearings before the FTC. Plus, millions of ozone air purifiers have been sold in the United States over the years, but there are no specific cases where an ozone air cleaner has been linked to any kind of harm or injury.

Why ozone is mistakenly given a bad name.

Ozone can only be harmful only when occurring at extremely high concentration. However, at lower levels it serves as a powerful purification element without harmful side effect. It is also a powerful purification agent in large doses, but can also act as a lung irritant in higher concentrations.

One example of this is an ozone alert, which is a warning to the public when outdoor levels of ozone reach a high level. Ozone alerts usually occur in already polluted areas where there is a high conctration of hydrocarbons in the air (pollutants that result from smokestack and vehicle exhaust pollution).

Why ozone is associated with smog.

In these cases though, the reason ozone concentration hits high levels in polluted areas is due to the fact that they are a byproduct of the sun rays coming in contact with hydrocarbons. This is the suns way of trying to neutralize the pollutants. In which case, where the hydrocarbon level is very high, the ozone concentration also becomes higher.

However, it is much easier to measure ozone concentrations than it is hydrocarbon concentrations, so ozone gets the bad name, even though it is the hydrocarbons that are the real problem. Most ozone air purification systems (including the Surround Air, Spring Air, and Biozone models) are designed to produce ozone in levels of less than 0.04 parts per million (OSHA recommends less than 0.1 ppm, while the FDA recommends .05 ppm, see chart below).

But as is the case with just about every other chemical element, ozone has its range of effects, from no effect, to useful effect, to hazardous effects.

Another good example of this is table salt, which provides essential fortification for nerve cells and the kidneys, and prevents heat stress disorders at lower concentrations. At higher levels though, salt can result in hypertension and cardiac failure.

8. What are the benefits of Ozone?
- Oxidize, disintegrate and neutralize assorted innocuous gases and substances such as carbon monoxide, carbon dioxide, methane and benzene etc.
- Has a strong ability to remove smoke and toxin, prolong the span of foods freshness.
- Kill bacteria and viruses such as mould, cold virus and tubercle bacillus. Ozone is widely used in medical field, especially in treatment of allergy, asthma, etc.

9. How does ozone work?

Ozone oxidizes airborne pollutants, then reverts to oxygen,
leaving behind cleansed and refreshened air.
Here is how this process works:

Oxygen Molecules Oxygen Molecules
Oxygen converted to ozone Ozone Molecules converted from oxygen (right) as a result of an electrical charge, such as that provided by lightning, or an Heaven Fresh air purifier.
Ozone molecule oxidizing pollutant One oxygen atom splits off to oxidize pollutant, leaving behind breathable oxygen and purified air.
Ozone is highly reactive, so it interacts with most contaminates and allergens it encounters. As the element with the second highest oxidation potential (next to flourine), ozone proceeds to destroy the pollutant through oxidation.

10. Ozone Levels and their Effects (ppm = parts per million)
0 ppm Most indoor environments - windows closed
.001 ppm Most indoor environments - windows open
.003-.01 ppm Low range at which average person can smell ozone
.02-.05 ppm Range in which ozone occurs in healthy outdoor environments. Typical level produced by ozone generators.
.04 ppm Heaven Fresh air purifiers (approx.) when operated according to instructions
.05 ppm Maximum recommended by ASHRAE in an air conditioned and ventilated space. Also maximum under FDA regulation for ozone.
.1 ppm Maximum allowed by OSHA in industrial work areas.
.2 ppm Prolonged exposure of humans in occupational and experimental conditions produced no apparent ill effects.
3 ppm Level at which nasal and throat irritation will first appear.
5 ppm Extended exposure could cause lung edema. Smog alert 1.
1 ppm Smog Alert 2.

11. Typical Applications of Ozone include:
  • Purification of drinking water
  • Hospital labs and operating rooms
  • Morgues
  • Cafeterias
  • HVAC systems
  • Deodorization of air in inhabited places
  • Food and plant preservation
  • Treatment of industrial liquid waste

12. Is excessive Ozone harmful to your health?
The Environmental Protection Agency (EPA) released new Ozone standards. They established an 8-hour standard of 0.08 parts per million (ppm) and defines the new standard as a concentration-based form, specifically the 3-year average of the annual 4th-highest daily maximum 8-hour ozone concentrations. The EPA also stated, In setting the 8-hour standard at 0.08 ppm, the EPA recognizes that since there is no discernible threshold below which no adverse health effects occur, no level would eliminate all risk. Thus, a zero-risk standard is not possible, nor is it required by the Clean Air Act. The selected 0.08 ppm level is based on the judgment that at this level public health will be protected with an adequate margin of safety. Current OSHA (Occupational Safety and Health Administration) and NIOSH (U.S. National Institute for Occupational Safety and Health) workplace limits for ozone exposure are 0.1 ppm for an 8 hour day/6 days a week. At this concentration healthy individuals will display symptoms of irritated eyes, dry throat, and stressed lungs. The U.S. Food and Drug Administration (FDA) set a limit of 0.05 ppm for ozone emitted from electronic air cleaners. California issues a Health Advisory when Ozone reaches 0.15 ppm. The State of California says during a health advisory, everyone is advised to avoid prolonged, vigorous outdoor exercise. People with respiratory related problems are advised to avoid any outdoor activities until the advisory is canceled.

13. Does Heaven Fresh air purifier generates excessive Ozone?
All Heaven Fresh air purifiers are not OZONE generator. They are negative ions purifiers that produce very minimum amount of Ozone (much below EPA and OSHA standart). It only produces Ozone level of at most 0.02 to .015 ppm in rooms 100-500 square feet based on High setting. If you set our air purifier to Low setting, it will generate even lower ozone level. So our air purifiers are free from Ozone effects. However, we recommend that individuals with a history of respiratory disease consult with their doctor about possible sensitivity to very low ozone.

More information and research articles about negative ions and ozone..........
1) Negative Ion Study by Penn State University
Negative air ionization has the potential to reduce the concentration of airborne microorganisms. The effect appears to result from the ionization of bioaerosols and dust particles that may carry microorganisms, causing them to settle out more rapidly.

2) Negative is Positive: Negative Ions In The Air by Tools For Wellness
In 1974, the Swiss Meteorological Institute first studied problems related to seasonal winds in various regions of the earth.The one common denominator in all these wind variants was the type of electrical charge of the ions in the air.

3) Healthy Breathing and Negative Ions by Monumental Message Health Tips
What is negative, but positively good for you? Negative ions.

4) Negative Ions and Computers by Alaska Science Forum
Evidence seems to be mounting that ion concentrations in the air do affect how people feel. Further, there is evidence that the new trend toward using computerized equipment in offices may be creating a special problem.

5) Treatment of Seasonal Affective Disorder (SAD) by The Good Drug Guide
This study was designed to evaluate the antidepressant effect of negative ions in the ambient air as a potential treatment modality for seasonal affective disorder.

6) Effects of Negative Air Ionization on Ambient Particulates by The U.S.D.A.
Two types of electrostatic air charging devices were tested for their ability to remove dust from air in a poultry hatching cabinet and to determine their potential for reducing airborne transmission of salmonellae.

7) The Need for Negative Ions in Laymans Terms by Chemtrail
Positive ions are bad... Negative ions are good.

8) Advanced Research on Ions by Project Air
Does The Atmospheric Ion Charge Affect Our Physiology?

9) Air Ionizers Wipe Out Hospital Infections by New Scientist

Repeated airborne infections of the bacteria acinetobacter in an intensive care ward have been eliminated by the installation of a negative air ioniser.

10) Benefits of Negative Ions on Liver and Lung Function By U.S.S.R.
The effect of negative air ions (NAI) inhalation by rats on
energy reactions of mitochondria in homogenates of liver and
brain was studied

11)Air ion effects on human performance
The effect of air ions on the human organism has been the subject of much debate. Commercial units are available which claim beneficial effects through the generation of negative air ions into the atmosphere. Conversely, it has been claimed that an excess of positive ions can cause discomfort and symptoms such as headaches and nausea in some people.

12)Negative Ions Create Positive Vibes

May 6, 2002 -- There is something in the air and while it may not be love, some say it is the next best thing -- negative ions. Negative ions are odorless, tasteless, and invisible molecules that we inhale in abundance in certain environments.

Research articles: Acrobat Reader required)           Download


  Negative Ions, Vitamins of the Air  by Jim Karnstedt and Don Strachan
When certain kinds of winds begin to blow throughout the world, hospital admissions, suicides, and crime rate skyrocket. One country-Switzerland-even accepts the blowing of the "foehn" during the commission of  a crime as mitigating evidence in court...... more

  How Ozone Works  ref:
Ozone disrupts the integrity of the bacterial cell envelope through oxidation of the phospholipids and lipoproteins. In fungi, ozone inhibits cell growth at certain stages. With viruses, the ozone damages the viral capsid and disrupts the reproductive cycle by disrupting the virus-to-cell contact with peroxidation........More
 "The prime cause of cancer is insufficient Oxygen at the cellular level and, Cancer cells cannot survive in a high Ozygen environment"  by Dr. Otto Warburg
 Effects of Anions and Cations in the indoor environment
An anion is the atomic element of air having the same electrical charge as found in fresh forest air, near a waterfall, seashore, or hot spring, and is capable of refreshing the human mind and body......More
  Ozone for Prevention ref:
Ozone is a powerful therapeutic tool for CURING diseases, but it is equally important for PREVENTION of disease..... More

14. What is HEPA filter?
HEPA filter also known as High Efficiency Particulate Air Filter usually employs a fan drawing air through a filter. Since it uses fans to filter the air, HEPA filter is usually very noisy and the cost to replace the filter is quite expensive. HEPA air filters can only effectively remove particles of larger than 0.3 microns from our air. And most of the airborne pollutants and irritants are smaller than 0.3. Also, with HEPA filter substantial portion of the airborne particles flowing through our rooms remain unfiltered. Only the air that passes through a HEPA filtering unit is cleaned.


15. How can Heaven Fresh air purifier purify the room without a filter?
We use high amount of negative ions and very minimum amount of Ozone to purify and sanitize the air. We use 16 stainless steel needle point to produce high negative ions and static dust collection plate to clean poisonous gases. Indoor airs usually contain high number of positive ions. And excessive positive ions can cause nausea, bad mood and dizziness. Our air purifier generates high concentration of negative ions to wipe out the excessive & harmful positive ions resulting in a fresh, clean and healthy air.

16. How much is the maintenance cost for Heaven Fresh air purifier?
All our air purifiers only consume 3W to 6W of electricity or equal to 2.5USD to 5USD of electricity per year.
17. Are there any negative effects using Heaven Fresh air purifier?
Since Heaven Fresh purifier is negative ion air purifier, it does not present any negative side effect. You will only live more healthy with our air purifiers.


18. How does Heaven Fresh air purifier compare in cost to the other air purifier?
Heaven Fresh air purifiers are much more economical yet more effective compare to other air purifiers. Heaven Fresh air purifiers can clean the air thoroughly with much cheaper price.


19. What is Black Wall or Gray Wall Effect?
Gray wall or Black wall effect is a situation where the dirt particles and black residue near the needle are electro-plated or built up to the wall. As a result, it will be hard to clean the air purifier.


20.Does Heaven Fresh air purifier have Black Wall effect?
Heaven Fresh air purifiers use the stainless steel needle point that is corrosion free. And the collector plate is made of highly conducive materials that will attract ionized particle. The ionized particle will only attach to the metal collection surface not the low conducive materials around the machine, cover or on the wall. So The Black Wall or Gray Wall effect will not occur on our air purifiers.

21. Does Heaven Fresh air purifier produce noise?
Our air purifiers feature virtually silent operation and noiseless design. Heaven Fresh air purifiers do not utilize fans that can cause serious noise pollution like the HEPA filter.


22. How much is the maintenance cost for Heaven Fresh air purifier?
No maintenance cost is necessary. The only maintenance needed is unit cleaning. Simply open the units, wipe off the dust on collector plate and the needlepoints every one or two months. And then clean the circuit inside the unit every six months.

23. How do I choose the right air purifier for my room?
Choose the best air-purifier according to your square footage, level of air contamination, odor levels and air circulation to get the maximum effectiveness and to be safe/healthy.
Application Room size Product
Large bedroom, living room, hotel, restaurant, hospital ward, club (160 to 270)ft² XJ-2000
Medium to large bedroom, study room, office, hotel, and bathroom (0 to 160)ft² XJ-1000
Vehicle (comes with car adaptor) large car or small car XJ-800
Refrigerator, food storage, restaurant or places where food freshness is important 250L or 55 gallons XJ-100
Brush for pet to remove odor and generates fresh and clean smell on your pet Several strokes as necessary XJ-250
Brush for your hair or clothes to remove any unpleasant smell such as cigarettes smoke or cooking smell Several strokes as necessary XJ-260
restroom, walk-in closets, stairwells (comes with light) restroom XJ-201
Very large bedroom, living room, hotel, restaurant, hospital ward, club 540 ft² Use two XJ-2000
Very large bedroom, living room, hotel, restaurant, hospital ward, club (270 to 431)ft² Use one XJ-2000 and one XJ-1000

24. Pollutants Removed

Air Ionizer HEPA Air Filter Activated Carbon Air Filter Ozone
* Solid Particles
* Smoke
* Dust/Dust Mites
* Dead Skin
* Pollens
* Insect Feces
* Mold Spores
* Animal/Pet Dander
* Chemicals
* Bacteria
* Microorganisms
* Viruses
* Volatile Organic Compounds
* Solid Particles
* Smoke
* Dust/Dust Mites
* Dead Skin
* Pollens
* Insect Feces
* Mold Spores
* Animal/Pet Dander
* Chemicals
* Bacteria
* All organic chemicals and gases, and some other types of chemicals.
* Cigarette smoke
* Odors
* A variety of organic chemicals
* Certain types of bacteria and other micro-organisms
* Odors



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