In your entire house you would need to have the air cleansed of all the dust , pet dander and the allergens which are airborne. To clean this air there are various thing that you will keep hearing and these are the whole house air cleaners as well as the whole house air purifiers. There are other things in the market which are the whole house air filters and the air filtration systems. If you have dental practice or if you have a new born baby then it makes all the more sense to have the whole house air purifiers.  A lot of people have these in areas where there are enclosed spaces like the safe room and there are companies that build specific products like the Safe room air purifiers from IQAir. In fact in the market there are portable air cleaners too as well as pet and odor air cleaners. Another reasons is to have asthma air purifiers for patients that have asthma

The biggest advantage that you have with the HEPA whole house air filtrations systems is that with one single thing you can actually clean the air of the entire house as opposed to having the air filter in each room. If you are considering buying the products which are available in the market then there are five types of products which are available in the market and these are the whole house HEPA air filtration bypass air cleaners, whole house electronic air cleaners, whole house self-charging electrostatic air filters, whole house ultra-violet light systems and the whole house portable ozone-ionizer air purifiers.  

The way they work is that that these take the bad air which is coming out of the air conditioning systems and will then clean them suing some technology like HEPA or the carbon filter. This clean air is now ready to be re-inducted into the air conditioning duct and that will help get the clean air into the whole house.  

Why do we need air cleaners is that we inhale air day which is about 3500 gallons and this air if it so bad quality can cause respiratory problems. These problems can be there from the allergens or the pet or dog dander and also the viruses that are there in the air. Then there is smoke as well as mold which can cause the bad air.  

 The cost of these can be huge depending on the type of the air cleaners or the air filters that you are trying to get. There are electrostatic precipitators that can be very costly. Another form are the self charging filters which are good because at least they do not consume much of electricity though they have their own disadvantages. The cost can be in the range of about $800 and can up to a few thousands. The dental air purifiers that are needed for the dental office are more costly than those needed for home. 

Now if you are looking for the costs to be less for the overall cleaning or the air for the whole house then make sure that you have the air cleaning systems in the main room  that is the bed room or the living room or the TV room.  The common brands that are available are the Austin Air, TRAC and the EZ air. IQAir healthpro Air purifier is another good one. AustinAir is also good and then comes the Blueir and the Allerair. Before buying you need to check the following features and that will help in making an informed decision. 

Air Purifiers Cleaning Capacity

Air purifiers pollutant removal capability

Filters included

Air Flow Rate for fan speeds

Power Consumption

Weight

Air purifiers that kill fungus

Another cautionary note is that look for the consumer reports best rated HEPA air purifiers before buying any air purifiers. There is nothing called the best air purifiers in the word so better be careful while buying and it all depends on the requirement that you have. Read all the air purifies reviews before buying. 

A better way is to buy air purifiers with humidifier for lowest price and also check if there are air purifiers that are on sale or they have some sort of air purifiers monthly payments  and that will ease the burden of paying a big amount.