The air inside a building might not be as clean as someone needs or desires. This is not to say that a bit of pollen and dust is bad for all people, just that some people are more sensitive and cannot be cured by taking more walks in the park in order to acclimate to the season. Some people have allergic reactions, need very clean air for medical reasons, or else their ventilation system is not adequate. For someone who needs extra clean, have an air purifier for the pollutant that bothers you installed quickly.
That is the advantage of an air purifier. It can be plugged in and used immediately. It might take months to schedule a visit from the air conditioning technician, and even changing the duct work might not solve all your problems. An old home might simply have dust or mite problems that the ventilation system cannot fix. Another problem is that finer filters require greater pressure to work. A larger central unit would be costly to install and operate.
An air purifier is the cheaper, quieter, and more effective solution. It can be used in a single room while a central heating and cooling unit is used for an entire building. An air purifier uses much less electricity because it uses electrostatic properties to remove indoor pollution. If a room is not frequently occupied or is occupied by an unaffected person, then using air purifiers only in rooms that are needed can save a lot on the energy bill.
Air Purifier For Pollutant Of Concern, the best argument for air purifiers is that they are quiet while doing the best job possible. They circulate large volumes of air while operating nonstop for much longer than an HVAC unit can safely or economically operate. Since they are always working, they are always removing allergens and even smoke from the rooms in which they are placed. Silence is evidence that money is being saved. Many models are a cinch to clean.
Perhaps the only unattractive aspect is that generally one is needed for each room. This is because they are freestanding or bolted to a wall and mostly circulate air within the confines of a space. Filling an entire house with them can cost more than a thousand dollars. On the other hand, a single unit usually costs less than $200 and can be placed in any room with electricity and removed at will. They last a long time as well with regular cleaning.
