Sharp Plasmacluster® 7000 Series KCP70CW Air Purifier and Humidifier
Is it powerful enough for your room?
Choose the size of the room and the ceiling height. We calculate how many times per hour the Sharp KCP70CW filters all of its air.
Room size
Ceiling height
The dark tick marks 4.8 per hour, the AHAM rule used for allergies.
Yes, it's powerful enough.
In a 350 sq ft room with an 8 ft ceiling, it filters all the air 5.5 times per hour at full speed and removes 90% of the smoke in about 25 minutes.
Calculation: smoke CADR × 60 ÷ (area × ceiling height). Time to 90%: theoretical, closed room, full speed. Indicative; doors, windows and furniture change the result.
What it does, in numbers
The CADR is the volume of clean air delivered per minute, measured by AHAM for three kinds of particles. The bigger the number, the faster the room is cleaned.
CADR and recommended room size: AHAM rating published by the manufacturer. Airflow, power and noise per speed: manufacturer's operation manual.
What it costs to run, all year
A purifier works best when it runs all the time. Choose a speed and how many hours a day: the cost follows.
$19
Electricity per year
Medium speed, 24 h a day, 365 days
Same calculation for every line: wattage × hours per day × 365 days × 11.142 ¢/kWh. In Auto mode, the unit slows down when the air is clean, so the real cost is usually lower than at a fixed speed.
On standby it draws 1.1 W, about $1.07 a year.
Power per speed: manufacturer's operation manual. Cost: Hydro-Québec Rate D, second tier (11.142 ¢/kWh, the higher price, before taxes), in effect since April 1, 2026.
What makes the Sharp KCP70CW stand out
What this model has that the others don't, then whether it fits what you need it for.
It has been in the official ENERGY STAR directory since March 30, 2022: 6.7 cfm of clean air per watt, and measured ozone emission of 1.0 ppb.
On Max, the manual lists 40 W for 272 cfm, compared with 94 W for the KCP110CW. Running 24 hours a day on Max, that's about $39 of electricity a year.
47 dBA on Max, compared with 55 dBA for the KCP110CW, and 21 dBA on low. A good pick for a bedroom where it will run hard during a smog episode.
With an AHAM smoke CADR of 255, it filters the air of a 396 sq ft room 4.8 times an hour. It humidifies too, up to 0.55 pint of water per hour.
What do you need it for?
What the air goes through, and when to change it
Each layer has its job. Air goes in at the back and comes out clean on top.
- 1Washable pre-filter
Catches hair, pet fur and large dust, and protects the other filters.
Vacuum or rinse, never replaced - 2Activated carbon filter
Absorbs cooking, pet and smoke odours. Do not wash it.
Replacement : FZ-J80DFU · up to 24 months - 3HEPA filter
The HEPA standard: 99.97% of particles of 0.3 µm. Smoke, pollen, dust mites, dander.
Replacement : FZ-P11HFU · up to 24 months - 4Humidifying filter
Water from the tray evaporates through it. Rinse it once a month.
Replacement : FZ-P11MFU · up to 24 months
A reminder every 30 days to clean the pre-filter and rinse the tray, and one in 24 months to replace the filters. Added to your phone's calendar, nothing to sign up for.
The questions people ask before buying
2/3 ruleHow to read the room size
AHAM recommends a smoke CADR of at least two thirds of the room's area. 255 cfm × 1.55 gives 396 sq ft: the air of that room is filtered 4.8 times an hour with an 8 ft ceiling. Bigger numbers you may see elsewhere are calculated at one air change per hour.
ENERGY STARCertified, checked on energystar.gov
We checked this model in the official ENERGY STAR directory: 6.7 cfm of clean air per watt.
1.0 ppbOzone measured
Ozone emission reported in the ENERGY STAR record for this model.
Same WHumidifying costs nothing extra in electricity
The manual lists the same power with or without humidification: the water evaporates through a filter, there's no heating element. Use fresh tap water, changed daily.
IonsPlasmacluster® (Sharp)
An ion generator that works alongside the filters and can be switched off. The effects described in the brand's marketing are the manufacturer's claims; the HEPA filter does the measured cleaning (CADR).
AutoIt adjusts itself
Sensors: dust, odour and light. In Auto mode, the fan speeds up when the air gets dirty and slows down when it's clean.
1 yrManufacturer's warranty
Limited parts and labour warranty from the manufacturer.
Side by side with our other purifiers
A purifier cleans one room. Ventilation renews the whole house.
A purifier recirculates the room's air; it doesn't bring in fresh air or remove humidity and CO2. An air exchanger does that for every room, and a central HEPA system filters the air of the ducts. AirGreen installs both.
Complete spec sheetData and cited sources
- Model
- KCP70CW
- AHAM CADR smoke / dust / pollen
- 255 / 260 / 259 cfm
- Recommended room (AHAM)
- 396 sq ft
- Low speed
- 64 cfm · 4.8 W · 21 dBA
- Medium speed
- 190 cfm · 19 W · 39 dBA
- Max speed
- 272 cfm · 40 W · 47 dBA
- Standby
- 1.1 W
- Humidification (max)
- 0.55 pint/h · tray 0.53 gal
- Carbon filter
- FZ-J80DFU · up to 24 months
- HEPA filter
- FZ-P11HFU · up to 24 months
- Humidifying filter
- FZ-P11MFU · up to 24 months
- Power supply
- 120 V · 60 Hz
- Dimensions (W × D × H)
- 15.8 × 12.4 × 28.6 in
- Weight
- 22.3 lb
- Wi-Fi
- Yes
- ENERGY STAR
- Certified (checked)
- Warranty
- 1 year
Sources checked November 2, 2026: Sharp KCP70CW spec sheet (sharp.ca) for the AHAM CADR, recommended room size, filters and warranty; Sharp KCP110CW/KCP70CW operation manual for airflow, power and noise by speed, standby, humidification and filter life. ENERGY STAR certification and ozone: ENERGY STAR directory (KCP70UW / KCP70CW, certified March 30, 2022). Cost: Hydro-Québec Rate D, second tier, 11.142 ¢/kWh, in effect since April 1, 2026. Costs shown are estimates.
Quick answers
How big a room can it clean?
According to its AHAM rating, up to 396 sq ft with an 8 ft ceiling, at 4.8 air changes per hour. In a bigger room it still cleans, just more slowly: try the calculator above with your own numbers.
How much electricity does it use?
Running 24 hours a day at Hydro-Québec's Rate D: about $4.68 a year at low speed, $19 at medium speed and $39 at max speed.
How often do the filters need changing?
The manufacturer gives up to 24 months for the HEPA filter (FZ-P11HFU), depending on the air in your home: smoke, pets and renovations shorten it. Clean the pre-filter every 30 days.
Can it run day and night?
Yes. A purifier only keeps the air clean while it runs. At its lowest speed it draws 4.8 W at 21 dBA, about $4.68 a year around the clock.
Air purifier or air exchanger: which one do I need?
They do different jobs. The purifier filters the air of one room; the air exchanger replaces stale, humid air in the whole house with filtered outdoor air. In a recent, airtight home, the exchanger comes first; the purifier adds a finer filter where you need it.
Not sure which one to choose?
Tell us about your rooms, allergies and budget: we'll point you to the right purifier, and we can look at the ventilation of the whole house.
AirGreen presents: The Sharp Plasmacluster® 7000 Series KCP70CW Air Purifier - The ideal solution for larger spaces
AirGreen, your trusted HVAC expert based in Montreal, is thrilled to announce the addition of a new high-end product to our assortment of indoor air quality innovations: The Sharp Plasmacluster® 7000 Series KCP70CW Air Purifier. This product is designed to deliver exceptional performance in larger spaces, proving its effectiveness up to 1913 square feet at one air change per hour.
Performance meets technology
This smart air purifier stands out for its triple-effective filtration system that cleanses the air passing through its filters with remarkable precision.
Washable pre-filter
The process begins with a washable pre-filter equipped with a micro-screen. This first line of defense traps dust and other large airborne particles, thus protecting subsequent filters and extending their lifespan.
Activated carbon deodorizing filter
Next comes the activated carbon deodorizing filter which acts as a sponge absorbing a variety of common household odors, be it cooking smells, smoke, or pet odors.
True HEPA filter
Lastly, the true HEPA filter, the pillar of this system, effectively captures 99.97% of particles from 0.3 microns and larger. This means it can remove the majority of allergens, including pollen, dust mites, mold, and even some bacteria and viruses.
Built-in humidifier
Not only does the Plasmacluster® 7000 Series KCP70CW purify the air, but it also includes a built-in humidifier to enhance the comfort of your space. This is particularly beneficial during winter months when indoor air can become dry and uncomfortable.
Various fan modes
This purifier also offers Max, Med, and Low fan speeds, plus an Auto mode. In Auto mode, the dust and odor sensors monitor your air quality and adjust the fan speed automatically.
Ease of movement
Designed for convenience, the KCP70CW comes with fixed caster wheels making it easy to move it from room to room. No matter where you need it, this purifier can get there effortlessly.
Remote control and smart features
One of the most innovative features of the KCP70CW is its connectivity. Compatible with Amazon Alexa and Google Assistant, it allows voice control, making its use and management easier. Moreover, you can monitor your home's air quality and adjust the settings remotely via the SHARP AIR app.
This app not only provides remote control but also includes additional modes such as Sleep mode for peaceful nights, Pollen mode for allergy seasons, and Express Clean mode for quick air sanitization. Furthermore, you can check the weekly scheduler, filter replacement status, Auto Presence ON/OFF, and air quality information history there.
Reliability and peace of mind
Notably, SHARP's Plasmacluster® Ion Technology is a proven technology, having been used in over 100 million products worldwide. It is endorsed by leading car and refrigeration appliance manufacturers, reinforcing trust in the product's quality and effectiveness. Make the choice for simply better living with the Sharp Plasmacluster® 7000 Series KCP70CW Air Purifier.
Sharp's Plasmacluster Technology: A Valuable Ally for Air Quality
At AirGreen, we understand that the purity of the air you breathe is a priority. That's why we're proud to incorporate Sharp's Plasmacluster technology into our air purifiers. This advanced technology generates positive hydrogen ions (H⁺) and negative oxygen ions (O₂⁻), which are naturally present in the air we breathe. Simply put, Plasmacluster ions are molecules of water and oxygen present in the air, but in a different form.
The Process of Generating Plasmacluster Ions
The generation of Plasmacluster ions is done in two steps. First, through a plasma discharge, the water and oxygen molecules in the air are ionized. Plasma discharge is a process in which a voltage is applied to the discharge electrode, thus generating positive hydrogen ions (H⁺) and negative oxygen ions (O₂⁻).
Then, these ions will attract the water molecules present in the air (H₂O) due to their electric charge, thus forming stable cluster ions. This structure resembles a grape cluster, hence the name "Plasmacluster". This is also why the Plasmacluster logo looks like a grape cluster.
The Working Mechanism of Plasmacluster Ions
Plasmacluster ions have an inhibitory effect on viruses and other harmful substances in the air. The positive (H⁺) and negative (O₂⁻) ions bind to the surface of viruses and other substances and transform into OH radicals. These OH radicals, endowed with extremely strong oxidation power, quickly extract hydrogen (H) from the protein on the surface of viruses and other substances, thus decomposing the protein and suppressing activity. The surface of bacteria and allergens is mainly composed of proteins. By removing the hydrogen atom (H) from this structure, the undesirable substance is deactivated. Moreover, the OH radical binds to the hydrogen atom (H) to immediately form water (H₂O), which is returned to the air.
Plasmacluster technology also offers the advantage of removing static electricity. Plasmacluster's positive and negative ions react with positive and negative charges respectively, thus eliminating static electricity. This is another example of how Plasmacluster technology creates a healthier and more comfortable indoor environment.
In short, Plasmacluster technology is an effective and safe way to improve your indoor air quality while removing bacteria, viruses, and allergens. At AirGreen, we are proud to offer this technology in our air purifiers, as we are committed to providing you with the highest quality air to breathe.