Sharp KC-850U Plasmacluster Air Purifier Review

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In Brief: Sharp KC-850U Plasmacluster Air Purifier Review

When True HEPA filtration is combined with Plasmacluster Ion Technology, we end with an efficient pollutant remover recognized as the Sharp KC-850U. Not just an air purifier, the Sharp model also takes care to maintain adequate humidity. It is a compact, smart, and dynamic air purifier that keeps a constant watch on the indoor climate and regulates itself to provide you with the cleanest air through library-quiet operations!

Sharp is originally a Japanese company that found roots in India in the past 17 years.

They are a well-known electronics company, and their product lines in India include air purifiers, kitchen appliances, and water purifiers.

The air purifiers are segmented into the home, car, and commercial categories, with each boasting of a wide range to fulfill different customer expectations.

In the following sections of this article, we are going to focus on a home air purifier with a built-in humidifier, which is a notch above the regular air purifiers.

Key Specifications Of Sharp KC-850U Plasmacluster

Source: Sharp

The Sharp KC-850U air purifier makes use of their Plasmacluster Ion technology so that even particles as small as 0.3 microns cannot escape its purification process, making it ideal for removal of common allergens.

The purifier features an auto mode that continuously monitors the air quality level and adjusts the settings for optimal purification and humidity.

This is achieved with the help of built-in humidity, dust, and temperature sensors.

There are also three manual settings for fan speeds that can be adjusted by the user according to preference.

Check out the features of this Sharp KC-850U air purifier in a quick video at

Some key specifications of the air purifier are tabulated below. :

Purification TechnologyPlasmacluster Ion Technology
Filtration Stages3
FiltersWashable Active Carbon, True HEPA filter, Humidifying filter
Particle Size0.3 microns
Coverage Area254 sq. ft.
CADR (CHM)Dust (164) / Smoke (164) / Pollen (174)
Power Consumption (Standby)0.3 W
Power Supply120 V, 60 Hz

Unique Features

While most purifiers have relied on HEPA filtration, the Sharp KC-850U has gone one step ahead and utilized a leading Plasmacluster Ion technology to rid the air of pollutants.

This technology not only tackles physical contaminants present in indoor air but also targets deeply permeated odors in the room to deliver fresh, cleansed air.

Another feature that makes the Sharp KC-850U stand out is the humidifying function. This ensures adequate humidity levels are maintained.

It is not a feature commonly found in other models that are primarily focused on air purification and circulation.

Lastly, the air purifier is AHAM Verified Tested, Energy Star Rated, and California Air Resources Board (CARB) Certified.


What All Impurities Sharp KC-850U Plasmacluster Removes

The four primary impurities that are attacked by the Sharp KC-850U air purifier are viruses, bacteria, mold, and odors.

The purifier achieves a 90.3% reduction in MS2 (common influenza viral stimulant). It has achieved a 94%, 84.3% and 89.7% reduction in E-Coli, Staphylococcus Epidermidis and Serratia marcescens, respectively.

Mold spores are a common accelerant for various allergies, and their reduction would have a direct impact on air quality.

Commonly found mold and fungi like Penicillium Citrinum and Aspergillus Niger recorded a decrease of 87.7% and 85.8%, respectively.

Lastly, the air purifier also targets odors that are deeply permeated into furniture, draperies, and carpets with the help of the Plasmacluster ions.

Traditional filters cannot achieve the same. So, the air purifier can get rid of smells like cooking smells, cigarette smoke, perspiration, pets, etc.

The reduction figures have been arrived at by experts after extensive testing in various laboratories around the world.

All kinds of germs, fungus, molds, viruses, airborne bacteria, surface-adhering bacteria, and odors are efficiently tackled.

Check out a quick video on how Sharp’s Plasmacluster Ion technology reduces mold in a quick video :

Can Sharp KC-850U Plasmacluster Remove Viruses ?

Yes, the Sharp KC-850U is useful in filtering certain viruses such as MS2 with a noted 90.3% reduction.

The MS2 is a stimulant used in the laboratory testing for common infectious diseases. These diseases include smallpox and influenza.

Sharp KC-850U Plasmacluster Air Filter Systems : How It Purifies Air

While traditional air purifiers rely on passing the air through multi-stage filtration for purification, Sharp has embedded their new-age Plasmacluster Ion technology for mimicking nature’s own cleansing process.

The process involves breaking down water molecules into positive and negative ions.

These ions are dispersed around the room using the water vapor present in the air, and they actively adhere to pollutants.

After dispersion, the ions neutralize the pollutants by attaching to the airborne contaminants.

As the final step, the ions return to the air as invisible water vapor ending the ionizing and purification process.

The technology doesn’t let the microscopic pollutants escape, which could evade the traditional filters.

Hence, the purification process is completed without any harmful perfumes or chemicals being utilized.


Filter Change, Repairs, and Warranty

Filter Change Requirements

The manufacturers claim an extremely long filter life of up to 5 years, but the numbers can vary according to the usage and the level of pollution.

The True HEPA replacement filter for Sharp KC-850U can be purchased here>

Since this particular model also takes care of maintaining an adequate level of humidity in the air, there is a dedicated replacement filter available to purify as well as humidify the air indoors.

The same can be purchased here>

Repairs and Warranty

The Sharp KC-850U is warranted for one year from the date of purchase, and this warranty covers parts and labor. However, the filters are not included as a part of the warranty coverage.

For any customer service requirements or warranty queries, the Sharp personnel can be contacted at 1800 – 425 – 4321.

Alternatively, you can also drop an email with specific questions at [email protected]

Price of Sharp KC-850U Plasmacluster and Its Filters

The Sharp KC-850U air purifier lies in the premium segment with quite a price tag to match the features.

While other models do not provide a humidifier, this model takes care of purification as well as maintenance of adequate humidity.

The technology employed is also Sharp’s registered tech. Therefore, the company has priced the product in accordance with the features offered.

It is comparable to some of Dyson’s higher price range purifiers.


Who Should Buy Sharp KC-850U Plasmacluster ?

The manufacturers recommend the best use for this Sharp KC-850U air purifier would be in any medium-sized room up to size 254 sq. ft.

The humidifying function ensures that the unit can be used in arid conditions so that the desired level of humidity can be achieved along with the purification.

Why We Like It

Our search for a premium air purifier leads us to this Sharp KC-850U model. It is an expensive investment and yet the features offered are unique in themselves and conducive to harsh, arid weather conditions in some areas of India.

The manufacturers have not only considered purification but also a careful regulation of humidity while designing this unit.

The Plasmacluster® Ion technology has been proved effective in the removal of several kinds of contaminants repeatedly in different lab tests.

With numerous certifications from various third-party entities, the product is a reliable and effective purchase!

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