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An air purifier is a product that cleans and rids the air of contaminants. Some claim removal of up to 99.9% of particles in the air of a home or business. They are commonly marketed for being beneficial to sufferers of asthma and allergies. Being able to reduce and even eliminate second-hand smoke is another attractive feature for many users. Commercial grade purifiers are made as either small units that stand alone or larger units that are able to be attached to an AHU (air handler unit) or an HVAC unit that can be found in industrial, medical and commercial industries. Home air purifiers can be used for an entire home or an individual room. Air purifiers are made in many different sizes and types with the most common being the HEPA filter. Most users of air purifiers purchase them to improve the air quality within their home or business. Types of air purifiersThe HEPA filter uses a cloth filter that is able to trap 99.9% of particles that are .3 microns or larger and a fan to circulate air throughout the machine.

HEPA filters are effective in retrieving nearly any harmful particle that is found in the air. The replaceable filter can last many years depending on the air quality of the room the filter is in. A HEPA filter is a very effective unit but is one that uses a lot of energyOzone is a reactive oxidant that can destroy some chemicals and bacteria. When it reacts with some substances in the air, those substances are broken down into materials that are pollutants. An Ozone purifier fights those pollutants. It is also very effective in fighting odors but does not work against allergens or most chemicals.This type of air purifier is very effective in capturing particular particles, including gas, smoke, and odor. It is also the most absorbent filter sold on the market. A carbon air filter contains small pores that are very absorbent and chemically react to particles as they pass through and the odors and particles attach to the carbon. This particular air purifier does not work against allergens or micro-organisms.

This type of purifier works by ‘ionizing’ air, causing particles to gain either a positive or negative charge. The ionic air purifier has a collection of plates that contain an opposite charge from the air particles; therefore, the particles are attracted to the plates. The charged particles will attract other particles with the opposite charge to them. An ionic air purifier is able to remove very fine particles in the air, even from several feet away, but it does not work on odors or kill germs. Ultraviolet light air purifiers. The Ultraviolet light air purifier sterilizes micro-organisms as they pass through, including viruses, germs, bacteria and mold. After they are treated with the ultraviolet light, the micro-organisms are no longer able to reproduce and grow. Ultraviolet light air purifiers do not work against smoke, odors, allergens or chemicals. Choosing the right type of air purifier can be challenging, but by understanding their main differences, an educated choice can be made based on someone’s specific needs.

The following are features to consider when purchasing the proper unit:Look for a unit that removes a high amount of particles from the air, including smaller-sized pieces.Choose a unit that is recommend for your size room. This is usually expressed as square feet.Consider what substances you want to be removed from the air: smoke, germs, bacteria, etc.Choose a purifier that has a reputable manufacturer. The Association of Home Appliance Manufacturers is a great source.If there is a particular pollutant affecting your health, look for a unit that works best at eliminating it.Replacement filters do cost so make sure to look at the replacement interval and the cost of filters.Make sure the warranty covers the internal parts of the unit.Make sure the unit is easy to operate, clean and change the filterIs the unit considered ‘whisper quiet’? You can request its operating noise values before you make a purchase. Quieter units are around 35 decibels.Look for a long-term and comprehensive warranty