14 Air purifiers

”Freedom is like air: you live breathing air. If the air isn’t clean, you suffer; if the air isn’t enough, you suffocate; if there is no air, you die” (Luigi Sturzo)
Cigarette smoke, dust, pollen, smog are just a few of the many factors that make air in our homes unhealthy. In some cases it isn’t always easy to let fresh air inside. City smog doesn’t always allow us to open the windows to let clean air in. In these case you may want to have an air purifier handy. This appliance intakes room air and it filters it and blows it out in the room again. Let’s see in detail how they work and which is your best option on the market.
There are two types of air purifiers: the ones that are suited for all the house and the portable ones. The first ones have to be connected to the electrical system and need professional intervention to be installed. The second ones are portable appliances that have a handle and wheels that let you move them wherever you want in the house.
The air is sucked in by a series of fans. Once in the machine, the air is filtered by dust, smog, odors, cigarette smoke, animal hairs and other allergens and it is blown out clean again. How does this filtering happen? There is a pre-filter (or mechanical filter) that blocks bigger particles. Then there’s an electrostatic filter which captures particles that have passed through the pre-filter. This filter needs to be changed frequently because it gets dirty pretty easily and its efficiency decreases as time passes. The ionizer captures even smaller particles which fall down where they can be removed. As per odors and organic and chemical elements an activated carbon filter is used. The most efficient filter is the HEPA. This one absorbs very small particles, 0.3 microns. You have to change it once a year. The only drawback is its cost.
After all these phases, air is blown back into the room. Essences can be added to the air to scent it. ... More ... less
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