If you are having some sorts of allergies or asthma, you may be suffering from some kinds of breathing disorders or hypersensitive to the irritants that are present in the air surrounding your living environment. Living in the environment with poor air quality has been repeatedly associated with the increase of the risk of sinus infection, asthma and air borne allergy.

The use of air purifier or air filter in home environment is very important and helpful, especially for those who are suffering from allergies or asthma. Air purifier is a device that is specially designed to remove air contaminants and small. High-efficiency particulate air filter or commonly known as HEPA filter is currently the best known air filter type which is very effective at removing smoke, pollens, air borne particles or allergens and keep the air fresh and clean. This will greatly reduce the factors of allergy and infection.

Since there are some many different types of air purifiers available on the market today, which one best suit your needs? In this article, we will review one of the various types of technology used in air purification which is the HEPA filter.

HEPA air purifier is by far the most popular among the various types of air purifiers. Like any other filter based purification systems, HEPA filter traps the airborne particles by forcing air through a filter, and the particles of certain size are then physically trapped and filtered. It is perfect at eliminating household allergens such as dust, pollen, pet dander and mold spores which the size is no smaller than 0.3 micrometer at the efficient rate of 99.97%. However, HEPA filter are not suitable for removing ultra small particles such as odors and perfumes which the particle size is normally smaller than 0.01 micrometer.

If you are one of those who are severely affected by air borne allergies, HEPA filter may apparently help to reduce the factors which cause allergic reactions by trapping the allergens in the filter and removing them from the air.

A few of the popular allergy HEPA air purifiers which received very good review will be discussed in the following section. They can be a good source of reference if you are looking for buying and installing an air purifier in your house.

IQAir Health Pro

IQAir Health Pro is one of the major air purifier manufactures in the market which has receives some of the best reviews from allergies sufferers as well as news coverage. It is the only brand of air purifier which was concluded to be powerful enough to meet the stringent requirements of Hong Kong Hospital during SARS outbreak during the year of 2002 and 2003.

IQAir Health Pro air purifier has a uniquely designed Hyper HEPA filter which is capable of purifying large area of coverage and filter out 100 times more particles than the normal device used in certain multi-million dollar clean rooms. You won’t even have to pay a fraction of that amount, of course.

To make your life easier with IQAir Health Pro, you can pre-program the timer and let the air purifier run automatically on specific time period such as during office hours or time after you are deep sleep. It is built with the money in your pocket in mind – the air purifier system is very robust and low cost to run, the filter life can last long and environmentally friendly with its’ patented triple seal and quality assurance system with a standard five year of warranty.

Alen A350

If you have a smaller room and no need of an air purifier than has the ability to purify large area or volume of air, then Alen A350 is the perfect alternative for you. Alen A350 is designed for smaller room coverage, most importantly, it is very effective at eliminating air borne allergens at the size of area it is designed to and it is cheaper than IQAir Health Pro.

Alen A350 is said to be quieter than most of the other allergy air purifier sold on the market. The advantage of it over other air purifier is that it can adapt an additional carbon filter and pre-filter on top of the HEPA filter to function effectively at eliminating smaller particles such as odors.

Operating Alen A350 is an easy task with its simple and intuitive touch button controls. The default 4-speed settings and timers allow you to easily adjust the air purifying speed according to the condition in the environment. Preset timers allow you to automatically turn on and off the device at any give time. Should you need to replace the pre-filter or HEPA filter, it is very handy and easy to change it even doing it yourself.

Whirlpool Whispure

If you have an even smaller room that is less than five hundred square feet, then Whirlpool Whispure air purifier which utilizes both HEPA filter and charcoal pre-filter is the one that you may want to consider of.

If you are one of those who always forget when you last replace the filter, Whirlpool Whispure air purifier has a friendly filter replacement indicator light which will remind you to replace the filter should the filter becomes too dirty and need your immediate attention. The replacement process is easy and the replacement filter and pre-filter are rather cheap and affordable for just about $30 if you are using Whirlpool Whispure model AP250 and AP150.

Honeywell Enviracaire

Last but not least, Honeywell Enviracaire HEPA air purifier 50250 is a perfect choice for you if you have a room of the size less than three hundred and seventy five square feet. It is a lot much cheaper but it does not have the air purifying capacity as much as the other air purifier as above. The only down side of this system is that it is reported to be a bit noisier than other air purifier systems.

Honeywell Enviracaire adapted a new lifetime vacuumable HEPA filter which will allows you to easily clean the filter by vacuuming it. It is recommended that you clean the filter every six months or twice per year.

There you have the review of the four most popular air purifiers available on the market today. Remember, no matter which air purifier you are getting, it is very important for you to replace the filter once every few months (depends on the level of daily usage) so the air purifier can continually to function efficiently to remove contaminants and pollutants from the air, to maintain the quality of the air and keep it fresh and clean from potential air borne allergens which may cause undesirable allergic reaction or even asthma symptoms to you.