6/30/2008

How far negative ions travel


Some negative ion generators generate a lot of negative ions but only very few reach you. It is very important to check how far negative ions travel (straightforward) before you purchase the ion generator.

How far negative ions travel

Cool wind does not reach you!
You want to enjoy cool air as it is extremely hot, but the cool air created by your air conditioner does not reach you. It is just wasting electricity.
The same goes with negative ion generators. If negative ions do not reach you, the generator is wasting electricity. Some negative ion generators generate negative ions but only very few reach you.

Pay attention to the distance from the negative ion generator!
Negative ion counts are generally measured in (pcs/cc). You cannot evaluate performance of negative ion generators with this value only.
For example, a negative ion generator which generates 1,000,000 (pcs/cc) can be good or not so good. This is because the distance from the generator where this amount of negative ions can be detected is not shown. Negative ion counts dramatically decrease as you go further away from the generator. There are products which emphasize the ion count detected at the blow off point while very few can be detected at 50cm away. This is why you need to pay attention to the distance.


The ion count at a distance away from the generator determines the performance of the generator.

Ion count in the blow off direction
The ion count detected at a certain distance away from the ion generator shows you how far negative ions travel.

You need to pay attention to the ion count at least in the blow off direction because most manufacturers do not provide ion count information in angled directions. It would be ideal if negative ion counts in the both directions were always available.



If the ion count at 1m away from the ion generator is below 10,000 (pcs/cc), the performance is not so good.

Ion count: Performance (for your reference)
300 (pcs/cc) at 50cm: Poor
3,000 (pcs/cc) at 50cm: Not so good
20,000 (pcs/cc) at 1m: Good
100,000 (pcs/cc) at 1m: Very good
Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

How widely negative ions spread out


Negative ions need to spread in every direction because you are not always in the blow-off direction. This is one of the most important factors when choosing the right product.

How widely negative ions spread out

Not always in the blow-off direction
As we mentioned in "How far negative ions travel", negative ion counts dramatically decrease as you go further away. The same goes with angled directions. It is possible that almost no negative ion molecule can be detected in the 30 degree direction. If you have such an ion generator, you always have to stay in the blow off direction in order to enjoy negative ions.



While cool air created by your air conditioner spreads throughout the room as time passes and temperature goes down, ion counts do not dramatically increase as time passes because negative ions vanish quickly. This is why negative ions need to spread in every direction.

Make sure negative ions spread in every direction
As mentioned above, a negative ion generator, which disperses negative ions to the blow off direction only, is not good for practical use. However, many models fail to perform this task because of technical difficulties. This is why you have to make sure that negative ions spread in every direction because you are not always in front of the generator.

How to make sure
Here is how to make sure that negative ions spread in every direction.
Coverage area
The coverage area is often decided by the manufacturer itself with no industry standard, so it is just for your reference.

Negative ion distribution
The negative ion distribution data shows how the ions spread. This data is not always available because very few companies disclose it. Here is the ion distribution data of the Ion House.

15,000 negative ion molecules per 1cc at the corner of a 20m2 room

Comparison
* Measured by a flat type air ion counter and our measurement method.
* Figures vary depending on air purification levels and other ambient conditions.
It is ideal to see how negative ions spread with the actual ion counts.


Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Performance is important


While a fashionable and stylish negative ion generator can decorate your room, you have to remember that the performance is the most important factor.

Pay attention to specifications

Appearance vs Performance
A negative ion generator which looks nice, powerful or is recommended by Professor xxxxx does not always perform well. The performance is more important.

Pay attention to the performance!

Appearance is important as your negative ion generator stays in your room but you have to pay more attention to the performance. As we mentioned in "How far negative ions travel" and "How widely negative ions spread out", the negative ion distribution data is very important as it shows the ion counts at certain distances/directions. If you can only find the negative ion count detected at the blow off point or at an unknown distance, you should contact the manufacturer for more information. Otherwise, you may end up with a quasi-ion generator.

Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Pay attention to specifications


Many negative ion generators manufactured by various manufacturers are found on the market. Many of them do not provide detailed specifications. Here you find the specification items you have to pay attention to.

Pay attention to specifications

The more information the better
Some manufacturers provide detailed specifications, while others do not. Here are the specification items required to evaluate performance of negative ion generators.

Click on the item for more information
Specification item Example Importance
Negative ion count (blow off direction) 20,000,000(pcs/cc at 0cm)
1,000,000(pcs/cc at 50cm)
700,000(pcs/cc at 100cm)
High
Negative ion count (angled directions) 500,000(pcs/cc in 30 degrees at 2m)
150,000(pcs/cc in 90 degrees at 2.5m)
10,000(pcs/cc in 180 degrees at 1m)
High
Maximum coverage area 40 m2 (430 ft2) High
Life span 5 years+ High
Safety measures Safety circuit, Ozone/EMI suppression High
Purification capability 90% of 0.3micron particles removed in 2 hours High
Stable performance Designed to maintain performance under extreme conditions Middle to High
Life span of ionizing needles 5 years+ Middle
Positive ion counts 0(pcs/cc) Middle
Ozone production 0.001ppm or less Middle
Test operation Comes with the ion detector for test operation Middle
Maintenance Cleaning of the ionizing needles Middle
Purchase of consumables Not needed Middle
Wind noise generation No noise due to no fan Middle
Specification item Example Importance


Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Negative ion count (blow off direction)


A maximum coverage area is just for your reference because it is decided by the manufacturer with no industry standard. We suggest you should choose the negative ion generator which covers the widest area possible.

Negative ion count (blow off direction)

Negative ion count (blow off direction) - (Extract from "Pay attention to specifications")
Specification item Example Importance
Negative ion count (blow off direction) 20,000,000(pcs/cc at 0cm)
1,000,000(pcs/cc at 50cm)
700,000(pcs/cc at 100cm)
High

Ion counts show you "How far negative ions travel".
You cannot evaluate performance of negative ion generators without negative ion count information.

It is possible that some million negative ion molecules are detected at the blow off point but very few can be detected at 50/100/200cm away.

If only less than 2,000-3,000 (pcs/cc at 1m) negative ions can be detected, the performance of the ion generator is not good and it is only good for mobile or other special use.

Not only ion counts in the blow off direction but also those in angled directions (found on the next page) are an important factor.

Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Negative ion count (angled directions)


It is ideal if negative ions spread in every direction. If very few negative ions can be detected in angled directions, the ion generator is just wasting electricity.

Negative ion count (angled directions)

Negative ion count (angled directions) - (Extract from "Pay attention to specifications")
Specification item Example Importance
Negative ion count (angled directions) 500,000(pcs/cc in 30 degrees at 2m)
150,000(pcs/cc in 90 degrees at 2.5m)
10,000(pcs/cc in 180 degrees at 1m)
High

Ion counts in angled directions show you "How widely negative ions spread out".

Ion count info in angled directions is a very important factor to choose the right negative ion generator but very few manufacturers disclose it.

If very few negative ions can be detected in angled directions, the ion generator is just wasting electricity.

We suggest you should pay attention on how widely negative ions spread out.

Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Maximum coverage area


A maximum coverage area is just for your reference because it is decided by the manufacturer with no industry standard. We suggest you should choose the negative ion generator which covers the widest area possible.

Maximum coverage area

Maximum coverage area - (Extract from "Pay attention to specifications")
Specification item Example Importance
Maximum coverage area 40 m2 (430 ft2) High

A maximum coverage area is just for your reference because it is decided by the manufacturer with no industry standard. We suggest you should choose the negative ion generator which covers the widest area possible.

It is ideal if negative ion count info in angled directions is available as it shows you how the ions can be distributed.

Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Life span


Before you purchase a negative ion generator you need to know the life span. Worn-out ionizing needles can cause lower ion counts or the generation of ozone which can be harmful to the human body.

Life span

Life span -(Extract from "Pay attention to specifications")
Specification item Example Importance
Life span 5 years+ High

We believe you want to purchase a product which can perform well for long periods.

Generally, ionizing needles determine the life span of negative ion generators which incorporate the discharging method.

Worn-out ionizing needles can cause lower ion counts or generation of highly concentrated ozone.

Before you purchase a negative ion generator you need to know the life span and how it is determined.

Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%

Safety measures


Safety measures are important. Negative ion generators which incorporate the discharging method use high voltages. Some products generate high levels of ozone which can be harmful to the human body.

Safety measures

Safety measures - (Extract from "Pay attention to specifications")
Specification item Example Importance
Safety measures Safety circuit, Ozone/EMI suppression High

Negative ion generators, which incorporate the discharging method, have internal circuits where high voltages are used. For your safety, we suggest you should choose a generator which is designed to prevent you from touching these circuits.

Some generators produce harmful ozone gas as the ionizing needles get worn out.

You should choose a safe product.

Ion Trading
The industry's highest performance negative ion generator
[Users testimonials] Good sleep 74%, Alleviation of migraine 85%, Less shoulder pain 66%, Feel refreshed 76%