FIWOTTTDA Review: An Air Purifier With UV-C Light

Full Review

With the expansion of the air purifier market, many new manufacturers have appeared. In this review, I will present a test of the FIWOTTTDA air purifier, a new brand with excellent specifications and amazing features.

The FIWOTTTDA uses 5-stage filtration and is designed for rooms up to 385 sq. ft. (36 m²), making it perfect for living rooms, bedrooms, offices, or similar spaces.

A smart sensor, auto mode, and timer are just some of the advanced features of this air purifier.

In this review, I will describe in detail all the specifications of the FIWOTTTDA air purifier, show the results of our tests, and give my honest opinion about it.

How We Tested the FIWOTTTDA?

1. For the filter efficiency testing, we used the Temtop LKC-1000S laser particle meter, which measures PM2.5 (µg/m3), PM10 (µg/m3), Particles (per/L), and HCHO (mg/m3) in the air, and also calculates the AQI.

2. We placed the FIWOTTTDA in two separate performance tests, one in a 320 sq. ft. (30 m²) room and the other in a 560 sq. ft. (52 m²) room. Then, we recorded the initial air quality values using the Temtop laser particle meter and let the FIWOTTTDA run at maximum speed.

3. After 60 minutes, we measured the new values using the Temtop laser particle meter and saved the data.

4. Next, we placed the FIWOTTTDA in a glass box, which we then filled with smoke. Then, we measured how much time was needed for the air purifier to remove all the smoke from the box.

5. Using a special noise measurement tool, we tested the air purifier’s noise level at all speeds. We measured the noise level on the dBA scale.

6. Finally, we measured the power usage at all speeds using an energy meter, after which we calculated how much it would cost to use the device at a particular fan speed for one month. For reference, we used an energy price of $0.12 per kWh.

I recommend using the FIWOTTTDA air purifier in rooms up to 385 sq. ft. (36 m²), even though the brand’s recommendations differ. According to its CADR, it will have an ACH of 4.8 in this room size, which is the industry standard and the reason I recommend using it for these sizes.

We have tested the device in rooms of similar and slightly larger dimensions. The FIWOTTTDA showed promising results in the tests, although not as high as I expected.

I was quite disappointed with the FIWOTTTDA’s odor and smoke filtering capabilities. The results were very poor, and the FIWOTTTDA failed to combat and neutralize even a small amount of smoke in the room.

With such high airflow at the max fan speed, I think this device needs a higher-quality carbon filter to achieve a better overall performance score.

We haven’t tested the FIWOTTTDA air purifier in auto mode, mainly because the accuracy of the air quality sensor isn’t great.

Testing in a 320 sq. ft. (30 m²) Room

In the first test, performed in a 320 sq. ft. (30 m²) room, which is slightly smaller than the recommended dimensions, the FIWOTTTDA performed well.

We left it running at maximum speed in this room for 60 minutes, after which we measured how much it improved the air quality. This air purifier managed to improve the air quality by an incredible 94%, which is comparable to some top-performing air purifiers, such as the Levoit Vital 100S and the TCL breeva A3, both of which also improved the air quality by 94% in this test.

However, you should keep in mind that there are much better air purifiers available. For example, the Winix 5500-2 improved the air quality by about 96%. But, the Winix is in a completely higher class than the FIWOTTTDA air purifier.

Testing in a 560 sq. ft. (52 m²) Room

However, in the second test, performed in a 560 sq. ft. (52 m²) room, the FIWOTTTDA wasn’t as effective.

In 60 minutes of operation at maximum speed, this air purifier reduced the PM2.5 particulate from 104 to 14.5 µg/m³, which is an overall air quality improvement of about 85%.

Again, this isn’t a great result, but it’s not too bad when considering that this room is larger than the recommended dimensions.

I recently had the opportunity to test the Alen BreatheSmart FLEX air purifier, which gave much better results in rooms of the same size. If you are interested in the details, I recommend you read the review on the Alen air purifier.

Performance – Smoke Removal Test

The FIWOTTTDA is a large air purifier with a high CADR, so I expected it to do well in the smoke test.

It removed all the smoke from the smoke box in 28 seconds, which is a really good result, especially considering its poor performance in odor neutralization.

I was surprised that it had a better result than the powerful Alen FLEX, which needed 32 seconds. However, the odor neutralization capabilities of the Alen FLEX are much better than those of the FIWOTTTDA.

The FIWOTTTDA uses an incredible five fan speeds and an additional sleep mode. This is a huge advantage, and I almost always prefer air purifiers with more fan speeds. That way, it’s easier to adapt the device to my own needs.

However, even though it has many different speeds, the FIWOTTTDA is still a very loud air purifier, especially at its highest speed, which produces a sound of 70.9 dBA.

This is the loudest air purifier at maximum speed I have ever tried. Refer to the chart above, where I placed only the top competitors of the FIWOTTTDA, and you will see that there isn’t any air purifier that is louder at maximum speed.

In sleep mode, the situation is completely different. The FIWOTTTDA produces a sound of just 40.9 dBA, which is quieter than many large air purifiers often compared to this one.

For example, the DREO Macro Max S produces a sound of 42.1 dBA at its lowest speed. The only air purifier, among those I compared on the chart above, that is quieter than the FIWOTTTDA in sleep mode is the Winix 5500-2, which produces a sound of 40.6 dBA.

Although the FIWOTTTDA has a few well-optimized fan speeds, I can’t rate it as well optimized for noise overall. There are many much quieter air purifiers in the same class (I mentioned a few in the paragraphs above).

The FIWOTTTDA is a medium-sized air purifier with a motor power of only 42W. This is a big surprise and an interesting fact, especially considering its CADR.

If you let the FIWOTTTDA run at full speed, 24 hours a day, for a month, your electricity bill would increase by about $3.96, which is not much. However, there are many other air purifiers with a similar CADR that use less power, such as the DREO Macro Max S, for example.

Don’t be shocked by the high electricity consumption if you use the air purifier at maximum speed because, in most cases, you won’t use it for an extended period at maximum speed.

A bigger problem with the FIWOTTTDA air purifier is the replacement filter, which lasts about six months and is very difficult to get because it is usually out of stock. Additionally, there are no third-party filter options available on the market.

Overall, I think the FIWOTTTDA is not ideal when it comes to operating costs, and there are much better-optimized and more reliable air purifiers available on the market.

Filtration Technology

The FIWOTTTDA air purifier uses 5-stage filtration. I really like that this air purifier uses UV-C Light as one of the filtering stages. Whenever we mention UV-C Light or an ionizer, it is essential to touch on the subject of ozone production. Fortunately, the FIWOTTTDA is a CARB-certified device, which means that it does not produce illegal amounts of ozone.

The filter is round in shape, hollow through the middle, and all stages are grouped in layers.

The pre-filter is the first stage of filtration. Its role is to effectively trap and reduce large allergens, dust, and particles.

The second filtration stage is a HEPA filter of medical-grade H13, which removes 99.97% of airborne particles down to 0.1 microns. Some of the particles that this filter removes are pollen, pet allergens, and dust.

The activated carbon filter is the third level of filtration. FIWOTTTDA uses a granular carbon filter, which is more efficient than fiber-based carbon filters. I must point out, however, that this model did not have an enviable performance during the gas filtration tests.

The high-efficiency silver ion filter is the last stage of filtration. Its purpose is to help remove some bacteria and viruses. 

UV-C Light is the last stage of filtration, separate from the primary filter. The UV-C is located inside the device, but it is well-positioned so that no light can get out of the device, so a large amount of air is configured to pass by it, so the efficiency of the UV-C light is very high. This light kills bacteria instead of trapping them like the other filters mentioned. The UV-C light on this model is not very powerful, consuming only about 0.8W, far less than the UV-C light in the GermGuardian AC4285 air purifier.

How To Change the FIWOTTTDA Filter?

Like any air purifier that uses HEPA or similar filters, the FIWOTTTDA requires frequent filter changes. Fortunately, the device uses a filter reminder to let you know when it’s time to change the filter.

Filters generally last up to 6 months or about 1800 hours in total. FIWOTTTDA filters are not washable, so I do not recommend washing or putting the filters in water.

However, I recommend cleaning the pre-filter with a vacuum cleaner at least once a month to keep the machine working well and extend the life of the other filters.

Total time: 10 min.

Installation and Setup

Before starting up the FIWOTTTDA air purifier for the first time, it is essential to make specific preparations. To begin with, it is necessary to remove the protective coating from the control panel. I recommend everyone to remove this coat because it is a bit thicker, so the touch keys do not respond very well to pressure.

After this, the filter should be removed from the housing, unpack it, the protective packaging should be removed, and after you put the filter back inside, the air purifier is ready to work. The last step is to plug the power supply into the FIWOTTTDA air purifier, plug it in, and switch it on.

Please note that placing the air purifier at least 20 inches away from walls or other objects is best and will allow it to work at its best performance.

Design

FIWOTTTDA is an air purifier characterized by its tower shape design. The device is white except for the air outlet, which is grey, and the control panel on top of the device, which is black.

When I unpacked the FIWOTTTDA air purifier, the first thing I noticed is that aesthetically it reminds me very much of the Xiaomi Mi 3H, and the dimensions are also very similar.

The FIWOTTTDA is a device of not high quality, and the plastic is also not high quality. Although the quality of the plastic is not very important for this kind of device, I have to say that I am a bit disappointed and that I expected the FIWOTTTDA to have better quality.

Although it looks very bulky at first, the FIWOTTTDA is a very light device. The downside is that there is no carrying handle, but carrying it from place to place is not a problem due to the device’s lightweight.

As far as the design of the devices is concerned, I think the engineers could have tried a little harder to make the fan better; sometimes, there is a weird sound coming from it. To prevent the fan from knocking, I recommend that you always keep the air purifier on a hard surface, never on a carpet or other soft surfaces.

Overall I fancy the aesthetics of the FIWOTTTDA air purifier, which is somehow sleek and modern.

Control Panel

The control panel is located at the top of the device, is round in shape, and contains touch buttons and all the necessary indicators that FIWOTTTDA has.

The buttons on the control panel are touch-sensitive. The control panel has the power button, the fan speed button, the timer button, PM2.5 indicators, a sleep mode icon, an auto mode icon, a current fan speed indicator, etc.

I do not like the fact that the touch buttons are sometimes not sensitive enough, and it is as if you have to find the angle at which the button responds best to pressure. It can be tedious at times, but you get used to it.

All in all, the indicators on the control panel are very legible and visible, the position of the buttons is good, and everything is in the right place. By the way, I prefer it when the buttons are on the top of the device, rather than, say, on the side, as is the case with the Afloia Mage air purifier. Because when the buttons are on the side, they are hardly accessible and not at all practical.

Airflow

FIWOTTTDA is, as I mentioned before, a tower air purifier. Almost two-thirds of the device is taken up by the filter, which is located on the underside.

The device has holes at the front and rear through which air enters. The air that is sucked in through the holes is then filtered and exits through the grilles on the upper side of the device.

Size and Dimensions

The air purifier weighs 3,6 kg. The dimensions of the device are 10 x 10 x 20 inches. FIWOTTTDA is a very lightweight device, even much more than you expect when you first see the device.

What is in the box?

You get a FIWOTTTDA air purifier, power cord, True HEPA filter, and user manual when you buy the device. I advise you to be sure to read the explanation I wrote at the beginning of the review to prepare the device for the first start-up. Especially since many first-time users simply skip some essential steps.

Features Overview

In terms of options and accessories, the FIWOTTTDA has a lot to offer.

The multitude of advanced options, some of which are often unavailable on slightly more expensive models, is just a testament to how much FIWOTTTDA wants to be a serious brand with serious air purifiers on offer.

Below I will describe how FIWOTTTDA’s options work, whether they are all functional enough, and whether they could be improved.

Air Quality Sensor and Automatic Mode

The air quality sensor is a feature that is increasingly an integral part of many air purifiers on the market. This is because there is too much competition in the market, and manufacturers have to look for different ways to meet customer needs and how to “force” a potential customer to buy their product.

The imposition of these accessories often leads to a situation, for example, in the case of the FIWOTTTDA air purifier, where the air quality sensor is of inferior quality and does not give entirely accurate measurements.

This sensor basically measures the air particles and displays the amount of PM2.5 in real-time on display on the control panel. However, these measurements often deviate and are not accurate, especially when comparing the readings with professional air quality equipment.

In addition to working in combination with the PM2.5 indicator, the air quality sensor also works in automatic mode. When the device is switched to automatic mode, the device’s speed will be automatically determined based on the air quality sensor readings. Depending on the current air quality, you can see what color the air quality indicator will light up in the table below. 

When it comes to the automatic mode, if the amount of PM2.5 is between 0 – 12 µg/m3, the device will switch to Speed Mode 1, if the amount of PM2.5 is between 12.1 – 35 µg/m3, the device will switch to Speed Mode 3. If the amount of PM2.5 is greater than 35.1 µg/m3, the device will switch to Speed Mode 5.

UV-C Light

UV-C light is an additional level of filtration that can be switched on or off as desired. Pressing the timer button for 5 s turns the UV-C light on or off.

The UV-C light in the FIWOTTTDA air purifier operates in the range between 260-275nm, which is in the field of ultraviolet light labeled as safe. This means that the UV-C in this model does not produce unacceptable amounts of ozone.

Filter Replacement Indicator

FIWOTTTDA uses a filter replacement indicator to let you know when it is time to change the filter. If it is time to change the filter, the indicator will light blue. How long the filter will last depends on several factors, but mainly on how the unit is maintained and the pollution level of the air purifier’s environment.

Timer

One drawback is that FIWOTTTDA does not have a smart app or some similar advanced options, but there is a handy and flexible timer option.

The timer is used to set how long the device should be working. The timer on the FIWOTTTDA air purifier can be set between 1h and 24h.

Sleep

The FIWOTTTDA uses sleep mode, which is a great compliment. Although it is generally a very loud air purifier, the FIWOTTTDA is in sleep mode more than quiet.

When you switch to sleep mode, it takes 3 seconds for all the indicators to go out, except for the sleep mode indicator and the power button, whose illumination is reduced by half. In sleep mode, each second button press will turn on the indicators (wake the device), but only the next press will register the desired change.

Child lock

A great option if you need to lock all the options on the air purifier and prevent accidental button presses. The child lock is activated by holding your finger on the Fan Speed button for 5 seconds.

Once the child lock has been activated, you will not be able to use any of the buttons on the appliance. Only if you deactivate it again (which is done in the same way as activation) will you return the device to its old settings.

Room Coverage and CADR

FIWOTTTDA is an air purifier with a CADR of 380 m³/h or 224CFM, which is sufficient for the device to purify the air one time in a room of 1540 sq. ft. or four times in a room of 385 sq. ft.

Since it is standard to take the size of a room in which the device can clean the air more than 4 times, it is usually 5 times. I will conclude that the FIWOTTTDA air purifier is best used in rooms up to 385 sq. ft. It has coverage similar to the Winix 5500-2, a fantastic air purifier with outstanding filtration technology and excellent performance.

The FIWOTTTDA is ideally suited for a living room, kitchen, or other similar medium-sized room.

FAQ on FIWOTTTDA