Sharp KC-F70-W Air Purifier: Trusted Review & Specs

Sharp is bolstering their hybrid air purifier lineup with more models, starting with the Sharp KC-F70-W and Sharp KC-H50-W, which they announced earlier last year. The Sharp KC-F70-W has already been launched in Amazon for a while, and today we will make a complete Sharp KC-F70-W Review to help you compare with the other Sharp air purifier with humidifier function.

Sharp KC-F70-W ranks B in our air purifier ranking list

Updated: If you want an air purifier with better warranty cover from Sharp, you should look for the Sharp KC-850U or Sharp KC-860U.

In Breathe Quality, we have reviewed all air purifiers under these sections. Also, we guarantee that:

  • We do give honest reviews (both pros and cons) so anyone will guarantee to have the wisest choices.
  • We do not (and never) exaggerate one product just to let you click the links and buy that product blindly.


sharp kc-f70-w review

  • High-quality air filtration system
  • Great humidifying system
  • High fan power
  • Very silent

  • Not from official US Sharp store

As the top 1 air purifier brand in Asia region, Sharp comes to U.S with only the best and latest air purifiers from their lineup, but we shouldn’t ignore the already good air purifier for domestic market. Let’s read our Sharp KC-F70-W Review to check most sold air purifier in many Asian countries last year.

Sharp KC-F70-W Price

According to Sharp, the Sharp KC-F70-W is among their best air purifiers, with both air purifier and humidifier functions. Apart from these highlight features, the Sharp KC-F70-W has a quite high fan power for more affordable price tag than Sharp KC-860U.

So, is this new lower mid-range offering worth considering over the current competition? The answer is, maybe, as the Sharp KC-F70-W doesn’t have any English instructions, just like the Sharp KC-B50 and Sharp KC-H50-W. It is more than an usual hindrance for U.S users.

Sharp KC-F70-W is often sold with just $330, and it is even cheaper than an official Sharp KC-850U with lower fan power. If Sharp can produce more air purifiers like the Sharp KC-F70-W in U.S market, certainly we will have the high-quality Japanese air purifier with much cheaper price.

Again, we don’t see many hybrid air purifiers with humidifier function in this price point. Only Oreck Air Refresh and Boneco H300 are the most proper competitor with our today unit, but they don’t have the core True HEPA fitler inside. And for that, I lean on the Sharp KC-F70-W much more.

Top Sharp KC-F70-W deals right now

Sharp PM2.5 corresponding humidified air cleaner, White, Plasmacluster 7000 KC-F70-W.

Powerful True HEPA filter that lasts for 2 years. Quiet Operation. High fan power.

Related post: Best air purifier 2022.

Sharp KC-F70-W Design and Size

The body of Sharp KC-F70-W has a similar design to that of the previous Sharp KC-H50-W. To be fair, Sharp air purifiers are unique in design, but deep in the family, one would be likely to borrow the same design from the others.

We will have here a all-plastic body, with the bigger size than the predecessor, 25 inches in height and 16.5 inches in width. However, the difference isn’t that big to realize, unless you put all Sharp air purifiers side by side to compare.

As I’ve mentioned before, the Sharp KC-F70-W is exactly the same design with its relative brother. It has a plain white color, with brushed rays on the surface. It also uses a similar bottom-to-top air flow system concept, covered by exactly the same air grills.

Using the same design language as the Korean high-end Winix HR1000, Sharp KC-F70-W has a top LCD display that is over the top control panel. It is also available in many native air purifiers from Sharp.

As a bigger device, Sharp KC-F70-W weighs 19 lbs. And this time, you don’t have the casters like in the case of the Sharp KC-H50-W. Well, this time, you need to move it by yourself.

Related post: Best air purifiers for bedroom.

Sharp KC-F70-W Filters

Sharp doesn’t change the air filtration system for many years, because they’re so proud of their signature Plasmacluster technology. In this Sharp KC-F70-W, we have a similar 3-stage air filtration system.

  1. Activated Carbon Filter – It helps reduce the pet odors and smoke, as well as some common household chemicals.
  2. True HEPA filter – The True HEPA Filter that captures 99.97% of as small as 0.3 microns particles like pollen, dust, pet dander, smoke, germs, bacteria, viruses, odors, mold, and fungus.
  3. Plasmacluster Technology – This technology is one kind of ionizer, which can further reduce the amount of pollutants. Can be switched on/off.

The signature air filtration system of Sharp is present, but without a certification by the California Air Resources Board (CARB) for having safe ozone emission concentration. It is reasonable, because Sharp doesn’t cover any warranties on this air purifier, or the company doesn’t release it as an official product on U.S market, either.

But don’t get it wrong. All air filters made by Sharp are widely used by many popular air purifier companies at the moment. For example, the True HEPA filter of Sharp KC-F70-W is high-quality and high-efficiency, and it can last for 2 years to drop the performance.

In addition, we have the signature Plasmacluster technology for this air purifier. This technology is awarded as the best air cleaning method in Japan, as it emits both positive and negative ions into the air, to form hydroxyls that decompose the protein and suppressing activity of the viruses. This technology can even remove static electricity and doesn’t release any ozone at all.

sharp kc-f70-w review


If you need a comparison test for this Sharp KC-F70-W with all its brothers, I made one in a room of 200 square feet, for 1 hour. I must admit, the Sharp KC-F70-W even had high efficiency as the Sharp KC-860U, for a much lower price.

sharp kc-f70-w review

For this air purifier, you need to use the air filter model FZ-D70HF.

Related post: Best air purifiers for allergies.

Sharp KC-F70-W Room Coverage

The Sharp KC-F70-W is capable of much larger room than the predecessor, even though the ion density of this air purifier is just 7000/cm³. It is recommended to use in 430 square feet.

The ACH of Sharp KC-F70-W is 4X. This air purifier can clean your room every 15 minutes.

The CADR of Sharp KC-F70-W is 240 cfm in general, which is the same performance as the flagship Sharp KC-860U.

Related post: Best large room air purifiers.

Sharp KC-F70-W Sound

Again, we have another air purifier with the ultra quiet fan, trademarked as LibraryQuiet operation by Sharp. The Sharp KC-F70-W is measured only 23 decibels (db) on lowest speed, which is the sound of rustling leaves.

On highest speed, the noise level is 55 decibels, which is a bit audible but it is not too noisy. If you plan to use the Sharp KC-F70-W in bedroom, you will be satisfied with such silent operation the device could run.

Related post: Best air purifiers for baby.

Sharp KC-F70-W Power Consumption

One of our most FAQs is “Do air purifiers use a lot of energy?” In fact, air purifier must be used for a long time to be efficient. And power consumption is one important criteria to review how much energy this air purifier will consume.

Sharp KC-F70-W has a rated power up to 77 watts, as it has more fan power than both Sharp KC-B50 and Sharp KC-H50-W, and need more energy to operate such high air flow.

If you run Sharp KC-F70-W for 8 hours per day, you need to pay $27.5 each year.

Related post: Best air purifiers for pets.

Sharp KC-F70-W Additional Features

Just like any mid-range air purifier with humidification feature, the Sharp KC-F70-W features the Smart Sensor, together with the temperature and humidity sensor, to give you everything you need to know about your indoor air. The Auto Mode can be enabled to monitor the fan power, accordingly to the current air quality status.

I can see the option of Sleep Mode in this Sharp KC-F70-W, and it can dim all lights and keep the fan speed on lowest. This is also the feature to use when you go to sleep.

Finally, there is a LED indicator for filter replacement, so you don’t need to keep remember the date manually.

1, Best air purifiers for smoke.

2, Best air purifiers for dust.

3, Best air purifiers for mold.

Sharp KC-F70-W Customer Service

Sharp is a huge brand, of course they are. But this brand is not as popular in the U.S market as it is in the rest of the world. Yes, marketing is one aspect of this unpopularity, but it also implies a difficulty in finding the good customer service if you live in the United States.

But don’t worry, as the U.S subsidiary of Sharp is quite active to hear from you. You can reach them toll free at 800-237-4277, or via email through their “Product Support” page. They are available for you 24/7, and this is one of the best parts for Sharp’s Customer Service.

However, for their air purifiers, they only provide an 1-year-warranty. For most situations, I believe this warranty is enough to cover your device.

For any imported products like Sharp IG-EX20, Sharp KC-F70-W, Sharp KC-B50 and Sharp KC-H50-W, however, you don’t get any support from this company.

Top Sharp KC-F70-W deals right now

Sharp PM2.5 corresponding humidified air cleaner, White, Plasmacluster 7000 KC-F70-W.

Powerful True HEPA filter that lasts for 2 years. Quiet Operation. High fan power.

Our verdict

The Sharp KC-F70-W is really a good deal, especially when it costs much lower than Sharp KC-860U. However, without proper customer service and English instructions, it is still very difficult for US users to buy this product. Perhaps, it is safe to stick with the model KC-860U.

  • Performance
  • Features
  • Annual Cost
  • Design
  • Price


Sharp KC-F70-W is high-quality and powerful, but it isn’t as reliable as Sharp KC-860U with official warranty honored by Sharp in the U.S.