Sharp air purifier: How often do you replace each filter?

Updated: 27.7.2026

What filters does a Sharp air purifier have, and why does it matter?

Most Sharp air purifiers in Israel work with two or three layers of filtration. Each layer has a completely different function, so you can't treat a "filter" as a single component. In fact, there are three types, and each wears out at a different rate.

First, the pre-filter is the first layer. Its job is to catch hair, coarse dust, and lint before they reach the more expensive inner layers. Since it only catches coarse dirt, it is not replaced. Instead, it is gently cleaned with a light vacuuming about once a month.

The activated carbon filter is responsible for various odors, such as cooking, pets, smoke, and cleaning fumes. It absorbs odor molecules, and over time it becomes saturated and stops working. It is important to note that this happens even if the device itself still appears to be working properly.

The HEPA filter is the layer that captures tiny particles, such as dust, pollen, and mites. It also captures allergens 0.3 microns and larger. It doesn't address odors, but it's the most critical for those with allergies or asthma.

How do you identify a worn filter without waiting for an indicator on the device? The air flow rate decreases, so the motor works harder and noisier to compensate. In addition, visible dust accumulates around the intake openings. Marom technicians encounter this again and again. A customer calls to complain about a device that "sounds different," and upon inspection it turns out that the filter has simply reached the end of its life.

In Israel, spring and fall are seasons with particularly high pollen concentrations in the air. Therefore, those who suffer from seasonal allergies should check the condition of the filter precisely before these periods, and not after them. This way, the device works at maximum efficiency precisely when the need for it is highest.

How often do you replace each filter in a Sharp air purifier?

The short answer: Once a year to two years for internal filters. The frequency depends on the indication on the device and the actual load in the home. According to the manufacturer's instructions, this is a general recommendation, not an absolute rule of thumb.

In homes with animals, near a busy street, or when the device is running continuously all day, it is worth expecting an earlier replacement. For this reason, Micha Eitan, Technical and Import Manager at Merom, recommends not waiting for a noticeable drop in air quality. As soon as the indicator lights up, that means the filter has already done its job.

Micha Eitan recommends: As soon as the indicator lights up or the air no longer feels clean, the most cost-effective replacement is with the original HEPA filter, depending on the device model.

marom-serv.co.il · Original part HEPA filter for Sharp FP-S40H air purifier 200 במלאי For details and booking →

What is the difference between a regular HEPA filter and a HEPA DEO?

Not all Sharp models are built the same, and this is a point that most general guides miss. For example, in models like the FP-S40H, the internal filter is HEPA DEO. That is, it is a single component that combines particle filtration with an adsorption layer, which breaks down chemical compounds and odors. As a result, in such a device there is no separate activated carbon filter to replace.

In other models, such as the FXJ80HW, the system is made up of two separate filters: a HEPA for particulates, and a separate activated carbon filter for odors. Each is replaced separately, and sometimes at a different rate. For example, if your home is primarily plagued by cooking odors, the activated carbon filter may need replacing before the HEPA.

For models with two separate filters, like the FXJ80HW, the activated carbon filter is the one responsible for cooking and pet odors:

marom-serv.co.il · Original part Sharp activated carbon filter for air purifier FXJ80HW 320 במלאי For details and booking →

What is Plasmacluster, and why isn't it replaced like a filter?

Plasmacluster is not a filter. It is an ion technology unique to Sharp that emits positive and negative ions into the room. This neutralizes airborne pollutants beyond what a filter can physically capture. Because it is an electronic unit, not a consumable filter material, it does not have a fixed “expiration date” like a filter.

However, periodic cleaning of the Plasma Cluster unit itself does require attention. The electrodes tend to accumulate dust and dirt over time, thus reducing emission efficiency. Therefore, most manufacturers, including Sharp, recommend cleaning the unit gently, and not touching the electrode directly.

In addition, manufacturer Sharp notes in the operating instructions that Plasmacluster air purifiers may emit slight traces of ozone. That is, this is a natural side effect of the ionization process, at levels significantly lower than safety standards. If a sharp, unusual odor is noticed after turning on the device, it is recommended to briefly ventilate the room and check that the unit is free of dust.

In a faulty plasma cluster unit - when cleaning is insufficient and there is a significant decrease in efficiency - an original spare part is available by model:

marom-serv.co.il · Original part Sharp Plasma-Cluster Unit for Air Purifier FPJ50HW 190 במלאי For details and booking →

How much does an original filter for a Sharp air purifier cost?

The price varies depending on the type of filter and model. Therefore, there is no uniform rate for all Sharp air purifiers. According to the price list on the Merom website, a pre-filter ranges from about 90-110 NIS. An activated carbon filter ranges from about 300-400 NIS, and a HEPA or HEPA DEO filter ranges from a similar range, about 200-400 NIS. A plasma-cluster unit ranges from about 190-230 NIS. In any case, the range depends on the device model. Therefore, before ordering, it is always worth ensuring an exact match to the model number. To arrange a technician visit, or to inquire about a specific model, you can contact Merom's service center.

How do I know which filter is suitable for my model?

The exact model number is on a sticker on the back or bottom of the device, usually the letters FP or FX followed by a number. Checking it before ordering can save you from ordering the wrong filter. So it's worth taking a minute to do this before you proceed with your order.

Common mistakes in maintaining a Sharp air purifier

The most common mistake is cleaning too aggressively. Rinsing the HEPA filter, using a strong detergent, or vacuuming at high power are usually done with the good intention of “cleaning thoroughly.” In reality, this damages the fiber structure more than the dust itself.

A second mistake, completely opposite, is intermittent operation to "save" electricity. Modern air purifiers are designed for continuous or prolonged operation, so frequent switching on and off only increases the load with each restart.

A third mistake is the opposite - postponing any maintenance, thinking that a gentle cleaning will always be enough, even when the indicator has already come on. However, a HEPA filter that has exceeded its lifespan does not "clean itself back." The fibers have already lost their trapping ability, even though the device still looks and operates normally.

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FAQ

Sharp FP-S40H air purifier shows filter replacement indicator after less than a year - is this normal?

Yes, that's right. The replacement indicator is based on the actual load on the filter, not on a fixed calendar. In a home with pets, smoking, a low floor facing a busy street, or continuous use 24 hours a day, the filter reaches the end of its life faster. Therefore, there is no need to postpone replacement to "justify" the price. A filter that has been heavily loaded no longer filters effectively, even if it appears intact.

Can I wash the HEPA filter in a Sharp FXJ80HW air purifier to save on replacement?

No. The HEPA filter in the Sharp FXJ80HW air purifier, like all Sharp models, is not washable. The fine fiber structure that captures particles as small as 0.3 microns is damaged by contact with water or aggressive cleaning. As a result, in most cases, efficiency decreases and does not return even after drying. The only component that can be cleaned regularly is the pre-filter, which can be gently vacuumed once a month.

I have a Sharp air purifier model FPJ30HB - which filter is suitable for it?

The Sharp FPJ30HB air purifier works with one combined filter, the HEPA Two in One (product code PFIL-A480KKEZ). This filter combines particle filtration and odor neutralization in the same component. In contrast, models like the FXJ80HW require two separate filters, so only one replacement is required for the FPJ30HB. The exact model number appears on a sticker on the back or bottom of the device.

Where can I buy an original filter for a Sharp air purifier and collect it myself in Holon?

Marom Services and Maintenance, Sharp's official service provider in Israel, sells original filters for all Sharp air purifier models on the website. marom-serv.co.il. You can pick up independently from the main branch at 3 Hatzorf Street in Holon, or alternatively receive delivery throughout the country within a few business days for 40 NIS. Over 300 NIS, shipping is free.

There is a slight, sharp odor after I turned on the Sharp air purifier with Plasmacluster - is this normal?

Usually yes. According to Sharp's operating instructions, air purifiers with Plasmacluster technology may emit slight traces of ozone, as a natural side effect of the ionization process. The levels are significantly lower than the accepted safety standards. However, if the smell is strong, lasts for a long time, or is accompanied by a decrease in the device's performance, it is worth checking that the Plasmacluster unit is free of dust. If the problem persists, it is recommended to contact Merom for diagnosis.