Air purifiers are available in different sizes and colors ; they also use different technologies to purify the air we breathe.

People have been found to prefer buying individual air purifiers for individual rooms. The reason could be that so many people live in compact flats. However, the whole house air purifier is still a good option if you have many rooms.

There are a few things that you need to consider before purchasing a whole house air purifier :

Consider your needs
First you need to decide whether you need a whole house air purifying system or just individual room air purifiers. The whole house model is a good option if you are looking for forced air heating or cooling. Otherwise, the only choice that remains is the room model. A good air purifier should operate without producing much noise ; it should also be economical with regard to power consumption.

Check the quality
Before you rush into buying one air purifier unit or another, you need to consider how efficient it is. The product you wish to purchase should be certified by the Association of Home Appliance Manufacturers. This association examines the system to see if it meets the standard room size with the clean-air delivery rate (CADR) which can measure the cleaning speed. CADR which is higher than 350 is said to be excellent whereas CADR which is less than 100 is considered poor.

Luckily, most whole house air purifiers show minimum efficiency reporting value (MERV). Based on the test, an air cleaning system with a MERV between 11 and 13 is considered to be excellent.

If you are the sort of person who travels a lot or who is always on the move, you need a portable or personal air purifier that you can always carry around with you. This should help protect you against breathing airborne impurities, catching colds or flu or any other diseases. The advantage of a portable air purifier is that it is easy to keep, you can put it on your desk, wear it around your neck or you can just clip it to your shirt.

Personal air purifiers come in several different types. There are ionic air purifiers, ozone air purifiers and several other types. Ozone air purifiers are not recommended as breathing in ozone can be harmful to your health.

Personal air purifiers are easy to maintain. You can use normal AA batteries or a DC adapter support. Some air purifiers come with rechargeable lithium ion batteries. The simplicity and easiness with which they can be handled may prompt you to get one for each member in the family to make sure they are all protected against airborne impurities and infections.

Car air purifiers are portable devices that can be used within a car to combat bacteria and harmful air pollutants. They run using the car battery, however, they are worked out so that they don’t get it flat.

People may buy car air purifiers for different reasons. People with asthma or allergy buy them to get relieved. Some other people may buy them just to remove the scent that a new car have.

There are different types of auto air purifiers. Some types can be placed on the dashboard and other types may be clipped to the car seat. They are usually adjustable so that you can direct the clean air towards you or towards any other passenger.

When trying to buy an air purifier humidifier, there are three main things that you need to take into account. These points can make the difference between a good product and a poor one.

Power consumption.
Some air purifier humidifiers tend to consume more power than others. The less power it consumes the better. Buying an air purifier is a sort of long term investment. You will be using it for years to come. So it is quite wise to check if the product you are about to purchase is going to burden you with any extra high electricity bills along the road.

Noise level.
This is another measure that you can use to evaluate air purifiers. Your air purifier filter should function with as little noise as possible. There is no point in getting rid of air pollution and getting noise pollution instead. So try to find one that is reasonably quiet since there is no way you can find one without any noise at all.

Is it easy to clean ?
Air purifier humidifiers need to be cleaned from time to time. That is part of the maintainance procedure. But some are much easier to clean than others. It is advisable to get one that is easy to clean because you do not want to hire a specialist to do the cleaning for you all the time. That may place an extra burden on your budget.

Now that you know the criteria against which you can measure the effectiveness and performance of air purifier humidifiers, it is time to go and find one that satisfies all these requirements.

HEPA Filters.
In the HEPA filters, the air goes through several different layers in order to get filtered. These filters are excellent for removing certain particles from the air such as ollen, dust and dander. They are also of great benefit to people who suffer from allergy and asthma.

Activated Carbon.
These air purifier filters are made using specially treated charcoal. The carbon has the ability to attract air-borne particles and bind them permanently to it. This sort of filters can work great at removing unwanted oders and chemicals from the air.

Ionic filters.
Electricity is used here to charge air molecules. The charge forces the floating particles to stick together. Over time, these particle masses get heavier and heavier until they no longer could be borne in the air. Eventually, they fall onto the ground. These filters are great for getting rid of pollutant particles but they are not as effective in removing odors and chemicals.

All the three types of air purifier filters work well except that some are more suitable to removing oders and chemicals while others are well designed to remove particles. Before you purchase one, try to evaluate your needs first. And then choose the air purifier type that better serves those needs.