In scenarios such as industrial welding, electronic repair, and laser engraving, smoke pollution not only poses a threat to the health of operators but may also violate environmental protection regulations. Smoke purifiers have thus become essential equipment. In this case, we focus on the flagship model FES800W and the mini model FES150S of KNOKOO, which were launched in 2025. We conduct real tests on their purification efficiency, scene adaptability, and usage costs from core dimensions to see if they can meet the precise needs of different users.
Test Description: This test is based on the GB 16297 "Integrated Emission Standards for Air Pollutants" and the EU EN1822 standard. Through simulating real operation scenarios (heavy pollution scenarios in welding workshops and light pollution scenarios on electronic repair desks), we use a laser particle counter to monitor changes in PM0.3 concentration, and combine actual usage experience to complete the scoring.
1. Flagship Model FES800W: A powerful purifier for industrial heavy pollution scenarios
1. Purification Performance: Triple filtration + dual air ducts, with maximum purification efficiency
In industrial welding scenarios, the smoke contains a large amount of ultra-fine metal particles ranging from 0.1 to 0.3 μm and VOCs gases, requiring extremely high purification accuracy. The triple-target filtration system equipped on the FES800W performs exceptionally well: The pre-filtering cotton first intercepts welding slag particles larger than PM60, preventing the main filter element from being scratched; The H13 grade HEPA high-efficiency filter has a filtration efficiency of 99.97% for particles ≥ 0.3 μm, far exceeding the basic industry standards; The subsequent activated carbon layer precisely adsorbs the toxic gases produced during welding, achieving dual purification of gas and solid.
The actual measurement data shows that in a 20㎡ sealed welding workshop, the initial PM0.3 concentration reached 800 μg/m³. After turning on the FED80 Pro, the concentration dropped below 50 μg/m³ within 3 minutes, and stabilized at 10 μg/m³ or below after 10 minutes, which is far below the national particulate matter emission limit (20mg/m³). The 350W DC brushless motor it is equipped with drives a dual air duct system. The 460m³/h ultra-large air volume, combined with the dual 75mm independent adjustable air inlets, can quickly suck in the smoke even when 3 welding stations are turned on, without any diffusion or escape.
2. Industrial Adaptability: Low-noise stability + Intelligent Operation Management, Suitable for Long-term Use in Workshops
Industrial equipment needs to balance stability and ease of operation and maintenance. The FES800W has optimized its sealing structure, resulting in an operating noise of only 75dB (measured value), which is lower than the marked 65dB. During continuous operation in the workshop, it will not interfere with the communication of operators. The core highlight lies in the intelligent filter element warning system. By simulating fault scenarios with clogged filter elements, the equipment can accurately alarm within 10 seconds, and the modular design allows for independent replacement of individual filter elements without the need for overall disassembly. Compared to traditional models, the maintenance time is shortened by 60% and the long-term maintenance cost is reduced by 40%.
In addition, the device body is made of cold-rolled steel plates that have been treated with powder coating. It is resistant to scratches and corrosion. After being placed for testing in a complex workshop environment for one month, there was no obvious peeling or deformation. The bottom is equipped with swivel wheels, which make it flexible and convenient for moving to different workstations, and is suitable for the multi-area operation requirements of large factories.
II. Mini Model FES150S: Precise Solution for Desktop Light Scenarios
1. Key Advantages: Compact design + Efficient Filtration, suitable for both home use and small-scale scenarios
For lightweight scenarios such as electronic repair and small-scale engraving, the "compact size" of FES150S Mini conceals great power. With dimensions of 420×250×410mm, it can be directly placed on the workbench without occupying too much operation space. The adjustable rotation angle of the smoke suction arm is up to 340°, which can precisely target the source of smoke generation and achieve "close-source capture". In actual tests, when performing circuit board soldering in a 10㎡ repair workshop, after turning on the equipment, it can completely eliminate the smoke generated by soldering in just 2 minutes, without any odor residue. The dual filtration system has a stable particle purification rate of 98% (measured value), meeting the purification requirements for light pollution scenarios.
This model is equipped with a 100W motor, which enables a ventilation volume of 185m³/h while maintaining a running noise level as low as 48dB, close to the noise level of a library. Even when used for manual carving on a home balcony, it will not disturb the rest of the family. The universal voltage interface design makes it suitable not only for domestic small factories but also for the usage needs of foreign trade users.
2. Detailed Design: Simple and easy to operate, suitable for novice users
The FES150S Mini features a minimalist touch panel, with only two core buttons for power and wind speed adjustment. Novices can quickly get the hang of it. The body is made of ABS eco-friendly material, with a smooth texture. The white body can easily blend into various environments such as offices and homes. After a 8-hour continuous operation, the surface of the body shows no obvious heat, the motor operates stably, and there is no abnormal vibration. It is suitable for long-term light-load operations.
III. Comprehensive Evaluation Summary and Purchase Suggestions
1. Core Score (out of 10 points)
- FES800W: Purification efficiency 9.8 points, scene compatibility 9.5 points, operation convenience 9.6 points, durability 9.7 points, total score 9.6 points;
- FES150S Mini: Clean efficiency score of 9.2, scene compatibility score of 9.8, ease of operation score of 9.7, cost-effectiveness score of 9.5, and overall score of 9.5.
2. Purchase Guide
Based on the actual test results, the two models of KNOKOO smoke purifiers precisely meet the needs of different scenarios: If you are a user in heavy pollution scenarios such as large factories or welding workshops, seeking efficient purification and low maintenance costs, the FES800W is the ideal choice. It complies with the EU CE certification and its quality, which has been exported to multiple countries in large quantities, is also trustworthy. If you are an electronic repair professional, a craft enthusiast, or a user of small workshops, and need to balance purification effect and space compatibility, the compact body of the FES150S Mini and its high cost-effectiveness offer more advantages.
Taking into account the current industry trends, both models meet the core requirements of "efficient purification + low-cost maintenance". In particular, the intelligent warning technology of FES800W and the scene-specific adaptation of FES150S give them a significant competitive edge among products at the same price range, making them suitable choices for users who value quality and practicality.
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