Sharp KC-860U Plasmacluster Air Purifier Humidifier Review In 2022: The Best!

An excellent product that is not getting enough attention from the community. Sharp KC860U PlasmaCluster is one of the best 2-in-1 air purifier humidifiers in the market. It can capture airborne dust and allergens, humidity your home, or do both at the same time. Using the power of HEPA and ultrasonic technology, there are lots of perks with a single combo unit than having 2 separate ones. But what is the drawback you might ask? How effective is the overall filtration compared with a conventional model? Find out in our complete Sharp KC860U review below.
online price (US)**
±649.99 $$$$$/ 7

(annual filter cost ±47)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Sharp KC-860U Humidifier Specification

ProductSharp KC-860U Humidifier
15.8 x 24.8 x 11.4 in
(40.1 x 63 x 29 cm)
Weight24.9 lb (11.3 kg)
Coverage (up to)341 sq. ft. (32 m2)
Airflow speed42-272 cfm (71-462 m3/h)
Dust free (CADR)230 cfm (391 m3/h)
Pollen free (CADR)245 cfm (416 m3/h)
Smoke free (CADR)220 cfm (374 m3/h)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
Micron Mesh Pre-Filter
HEPA filter
- Lifespan
- Replacement cost ($)
HEPA filter with Microbial FZ-C150HFU
5 years
Carbon filter
- Lifespan
- Replacement cost ($)
Washable Deodorizing filter FZ-C150DFU
5 years
Ionizer/ TechnologiesPlasmacluster Ion technology
UV-light/ PCO
Other filter
Humidifying Filter FZ-C100MFU
2 years
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
Humidifying Capacity0.6 - 1.5 pints
Water tank9.1 pints (1.14 gallons)
Noise level19 - 54 dBA
Power usage level4.8 - 87 W
Timer/ Scheduler
SensorsTemperature, dust, and humidity sensors
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty1 year
Email/ Phone support

Key Features

  • 5-stage filtration with humidifying
  • Permanent pre-filter
  • True HEPA filter - 99.97% capture efficiency as small as 0.3 microns
  • Activated carbon deodorizing filter
  • Plasma cluster Ion Technology
  • 3 fan speeds (LOW, MED, MAX)
  • Quick Clean mode, Pollen mode, Auto mode
  • Humidistat, dust and odor indicator
  • Smart sensor (temperature, dust, humidity)

Design And Usability

Sharp KC-860U Humidifier dimension
15.8 x 24.8 x 11.4 in
(40.1 x 63 x 29 cm)
Sharp KC-860U Humidifier weight
24.9 lb (11.3 kg)

Yet another beautiful and highly functional design from Sharp. At 15.8 x 24.8 x 11.4 in dimension and a heavy 24.9 lb weight, it has a powerhouse size that may be a problem for small apartments or studios. Slightly difference setup, the air inlet is located at the back along with the dust, temperature, and humidity sensor. The air outlet is at the top while a water tank is located at the side with 2 grab handles. The front is dominated by the vertical air quality indicator. The dust monitor indicator will switch from green (clean), yellow (dirty), and red (very dirty) according to the surrounding condition. Water supply indicator light that will turn red when the water tank is empty. Below it is the humidity indicator light that will display the relative humidity level in the room. Lastly, the Plasmacluster indicator light will turn blue when it is activated.

Let’s jump straight to the control panel as we have many things to touch on. On the most left, Filter Reset Button that will reset the filter countdown time on press and hold for 3 seconds. Used after you have changed the filter and the indicator light is red. Below it is the Plasmacluster button that will On/ Off the Plasmacluster cleaning. Further below it is the light controls button that will cycle between brighter, darker, and turn off. Moving to the fan speed control, on press, it will cycle between Auto, Pollen, Max, Med, and Low. Now let’s focus on the middle holy trinity button. Clean air button activates only purifying, Clean air & Humidity activates purifying and humidifying. Quick Clean will activate both clean air, humidifying plus Plasmacluster ions for a short period of time. THE Power OFF button will shut down all operations (duh).

Airflow, Coverage, And CADR

Sharp KC-860U Humidifier coverage
Purifying coverage
341 sq. ft. (32 m2)
Sharp KC-860U Humidifier fanspeed

Sharp KC860U PlasmaCluster is an outstanding air purifier but an average humidifier. With a high delivery rate between 42-272 cfm, there is plenty of airflow juice to be distributed for large room sizes. There are 3 highly adjustable speed plus Auto and Pollen mode. Auto mode will automatically switch the right speed depending on the number of airborne impurities. Pollen mode will operate at High speed for 10 minutes, then alternate between Med and High every 20 minutes. As for the somewhat disappointing 1.14 gallons water tank, it is nowhere near the fastest or the biggest in the industry. No issue running for a day without refilling though.

Sharp KC-860U Humidifier dust CADR
230 cfm (391 m3/h)
Sharp KC-860U Humidifier pollen CADR
Pollen CADR
245 cfm (416 m3/h)
Sharp KC-860U Humidifier smoke CADR
Smoke CADR
220 cfm (374 m3/h)
Clean air delivery rate is a great benchmark to reflect on Oreck WK15500B air purifying capabilities. Dust CADR is at 230 cfm high, pollen at 245 cfm and smoke the least at 220 cfm. Impressive clean air output that rivals even some dedicated air purifiers.

Filters And Performance

The reason why Sharp KC860U earns its reputation as one of the best air purifier humidifiers. The back first-stage pre-filter will block out large airborne particles like dust and hair. Next, the washable deodorizing filter will absorb incoming smoke and odors that manage to skip pass the pre-filter. The last-stage True HEPA filter will now focus on microscopic particles as small as 0.3 microns with an efficiency rate of 99.97%. Plasmacluster will create positive and negative ions using water vapor in the air. The active ions will then proceed to neutralize pollutants in the air. There is also a humidifying feature that will humidify the air with water that has been filtered by the humidifier tray.

Noise And Energy Usage

Sharp KC-860U Humidifier noise level
Noise level
19 - 54 dBA
Sharp KC-860U Humidifier power consumption
Power consumption
4.8 - 87 W
Being an air purifier focus humidifier, Sharp KC860U noise isolation is far from the best. At 19 - 54 dBA noise output, a distinctive noise can be heard at the highest speed especially during the night time. If you set it to the lowest speed, noise is more subdued but still not to the extent of an ultrasonic humidifier. As for power usage, it can go as low as 4.8 watts all the way up to 87 watts. This highly depends on the speed you're in and is Plasmacluster activated. Sharp KC860U is Energy Star rated in case you're wondering that.
Noise TypeDecibels
Sharp KC-860U Humidifier19 - 54 dBA
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

Sharp KC-860U Humidifier MRSP/ RSP
+- 649.99
Sharp KC-860U Humidifier annual filter replacement cost
Annual Filter Cost
+- 47
^ Replacement filters/ estimated cost
Sharp KC860U PlasmaCluster can go as high as 497 on the market. There are places that are selling much lower but it is subject to availability as it has been in the market for a while. Do we think the price is reasonable? Absolutely, given the specification and filters you get pre-bundled. On a more positive note, Sharp filter replacement is well known to be very cost-effective. Both HEPA and deodorizing filters can last up to 5 years while humidifying filter can last up to 2 years.
Due to the limited stock, not many places carry Sharp KC860U PlasmaCluster. You can still try your luck on all major retailers like Costco, Best Buy, and Walmart. While Sharp official U.S. website does not have an e-commerce store, the next best place is Amazon. It has the best price, free shipping, and 30 days return policy as standard. Again, stock quality maybe low so do take note of that.

Sharp KC-860U Humidifier VS The Challengers

Oreck WK15500B Air Refresh

Oreck WK15500B Air Refresh Humidifier

An identical model with a similar approach. Oreck WK15500B comes with a smaller body frame with a cheaper price tag at the cost of performance.
BONECO W300 Humidifier Air Washer Review

BONECO W300 Air Washer Humidifier

Not exactly a direct competitor but it is much more simple to use and better at humidifying. It is also cheaper for a product with a Swiss heritage.


  • A more air purifier oriented humidifier with an impressive 5-stage filtration.
  • Impressive 200+ dust, pollen, and smoke CADR.
  • Long-lasting washable deodorizing filter and True HEPA filter with microbial coating.
  • Plasma cluster Ion Technology that can reduce airborne viruses, mold, and fungus.
  • Autonomous purifying that works well with the trio Smart Sensor.
  • Suitable for night use with dimmable light and low noise output.


  • Expensive with limited availability.
  • Timer is surprisingly omitted here.
  • Limited humidifying capacity with a small water tank.
Sharp KC-860U Plasmacluster Air Purifier Humidifier Review

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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