The new Dyson Big+Quiet still leaves a lot to b...

This month, Dyson introduced its latest Big+Quiet line of air purifiers. With its futuristic, almost alien-like design, the device continues Dyson’s trend of making bold claims about air purification that often fall short of expectations. Let’s dive deeper into what this product offers and compare it to what experts recommend. --- At Eoleaf, we’ve previously critiqued Dyson’s lack of transparency and underwhelming performance when it comes to air purification. As a leading global tech company, Dyson seemed to spot a growing consumer demand for air purifiers and jumped on the bandwagon. While their products are popular due to their sleek designs, our analysis revealed that the air purification capabilities of their Hot+Cool 2-in-1 air purifier (which combines air purification with heating/cooling) are far from impressive. Moreover, many of their technical details remain undisclosed, leaving potential buyers in the dark. In contrast, at Eoleaf, we equip our devices with eight distinct air purification technologies to tackle all kinds of indoor air pollution. Some of these advanced technologies include UVC sterilization, photocatalysis, and ionization—features that Dyson’s offerings lack entirely. For instance, our devices utilize UVC sterilization to eliminate airborne germs such as bacteria and viruses, something that is crucial for maintaining clean indoor air. Additionally, our systems employ photocatalytic oxidation and ionization to further enhance air purification. We also advise caution against multi-functional devices like 2-in-1 or 3-in-1 purifiers that combine air purification with heating, cooling, or humidification. These hybrid devices often compromise efficiency and filter longevity due to fluctuating temperatures and humidity levels, which can degrade the microfibers in the filters. In our opinion, the best approach is to invest in a dedicated air purifier that prioritizes filtration efficiency above all else. --- Recently, Dyson launched its Big+Quiet air purifier, which is specifically designed for professional settings such as offices, schools, and hotels. It claims to purify spaces up to 100 square meters and is priced at £569.99 in the UK and €999.99 in Europe. Unlike their other models, the Big+Quiet focuses solely on air purification and does not offer additional functions like heating or cooling. One notable improvement is that the Big+Quiet has been optimized to run quieter than previous models, with a maximum noise level of 55.6 decibels at its highest fan speed. However, this device only offers two fan speeds, which might limit flexibility for users who need more nuanced control over airflow. Another new detail revealed is that its activated carbon filter contains 430,000 square meters of activated carbon—a figure that sounds impressive but lacks context without knowing the weight of the filter. For comparison, Eoleaf’s AEROPRO 150 uses an activated carbon filter weighing 1.28 kilograms, which provides a clearer sense of the actual capacity. Let’s take a closer look at how the Big+Quiet stacks up against Eoleaf’s AEROPRO 150, our professional-grade model: | **Feature** | **Dyson Big+Quiet** | **Eoleaf AEROPRO 150** | |---------------------------|---------------------------------------------|--------------------------------------------| | **Technologies** | HEPA filter, activated carbon filter | Prefilter, bamboo fiber filter, HEPA filter, activated carbon filter, photocatalysis, UVC sterilization, ionization | | **HEPA Filter Efficiency**| Captures 99.95% of particles down to 0.1 microns | Captures 99.97% of particles down to 0.01 microns | | **Activated Carbon Filter**| Surface area of 430,000 m² | Weight of 1.28 kg | | **CADR** | Not disclosed | 670 m³/h | | **Air Circulation Angle** | 50° | 360° | | **Fan Speeds** | 2 | 5 | | **Standby Power Usage** | <0.5 watts | <2 watts | | **Noise Levels** | 43–55.6 dB (low–high) | 30–60 dB (low–high) | | **Filter Lifespan** | Not specified | Up to 12 months | | **Weight** | 11.57 kg | 11.8 kg | | **Size (H x W x L)** | 830 x 415 mm | 840 x 312.5 mm | | **Room Size** | Website claims 100 m², specs state 70 m² | 120 m² | | **Smart Features** | Connects via MyDyson app | Compatible with Tuya Smart app, Bluetooth remote, voice commands, gesture controls | --- ### Our Analysis When considering the price point of the Big+Quiet, it becomes apparent that Dyson is charging a premium for an air purifier that essentially includes only a HEPA filter and an activated carbon filter. For a product in this price range, it seems unreasonable to settle for such basic filtration technologies when competitors like Eoleaf offer far more comprehensive solutions. For example, our AEROPRO 100 covers the same surface area as the Big+Quiet but is approximately 30% cheaper. Furthermore, the Big+Quiet lacks UVC sterilization technology, which is essential for combating airborne pathogens like bacteria and viruses. Without this feature, the device cannot effectively sanitize captured germs, potentially turning it into a breeding ground for microbes. Another significant issue is Dyson’s continued reluctance to disclose the Clean Air Delivery Rate (CADR), a standard metric used across the industry to measure air purifier efficiency. By refusing to adopt this benchmark, Dyson makes it nearly impossible for consumers to compare their products objectively with those of other brands. Instead, they rely on their proprietary POLAR test, which lacks universal applicability. If Dyson truly believes in transparency, they should at least publish both the CADR values alongside their POLAR results to give buyers a clearer picture of their product’s performance. Ultimately, while the Big+Quiet may appeal to those who prioritize aesthetics and convenience, it falls short in terms of innovation, filtration capability, and value for money. For anyone serious about improving indoor air quality, investing in a dedicated air purifier like the Eoleaf AEROPRO 150 is a far better choice. After all, when it comes to your health and breathing cleaner air, the promises made should always align with reality.

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