The new Dyson Big+Quiet still leaves a lot to b...
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This month, Dyson introduced its latest Big+Quiet series of air purifiers. Boasting an eye-catching, almost alien-like design, the new device once again showcases Dyson's tendency to over-promise and under-deliver when it comes to air purification. Let’s dive deeper into what this product offers.
### Our Review of Dyson Products: A Recap
At Eoleaf, we’ve previously expressed concerns about Dyson’s lack of transparency and underwhelming technological capabilities in air purification. As industry experts, we’ve observed that Dyson entered the air purifier market after recognizing a growing consumer demand. Their products are popular due to their sleek designs, but during our assessment, we found their Hot+Cool 2-in-1 air purifier (which combines air purification with heating/cooling functions) to be significantly lacking in performance. Furthermore, many of their devices' technical specifications remain undisclosed or inaccessible to the public.
During our research, we discovered that Dyson’s Hot+Cool air purifier essentially relies on a HEPA-certified filter and an activated carbon filter. In contrast, our devices incorporate eight distinct air purification technologies to tackle various types of indoor air pollution. Here are some of the advanced technologies our devices feature that Dyson’s do not:
- **UVC Sterilization**: To combat airborne germs such as viruses and bacteria.
- **Photocatalysis**
- **Ionization**
Moreover, we advise caution when considering multi-functional devices like 2-in-1 or 3-in-1 models, which combine air purification with heating, cooling, or humidification. While these devices may seem convenient, they often compromise efficiency and filter longevity. Temperature and humidity fluctuations caused by such devices can damage the microfibers in filters, reducing their effectiveness and necessitating more frequent replacements. Although we’d love to offer a multi-functional product, it’s simply not feasible to maintain high-quality air filtration across multiple functions. For optimal indoor air quality, we recommend investing in a device dedicated solely to removing pollutants.
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### Introducing Dyson’s New Big+Quiet
Recently, Dyson launched its Big+Quiet air purifier, which focuses exclusively on air purification without offering additional features like heating, cooling, or humidification. Designed for professional settings such as offices, classrooms, and hotels, the Big+Quiet claims to purify rooms up to 100 square meters and is priced at £569.99 in the UK and €999.99 in Europe.
#### What Sets It Apart?
This model has been "re-engineered" to be quieter than previous versions, achieving a noise level of 55.6 dB at its highest fan speed (the device operates on two fan speeds). One notable technical detail revealed is that its activated carbon filter contains 430,000 square meters of activated carbon. However, this statistic is meaningless without knowing the weight of the filter (our AEROPRO 150’s activated carbon filter weighs 1.28 kg). Once again, this highlights Dyson’s preference for flashy marketing over meaningful, comparable data.
Below is a technical comparison between Dyson’s Big+Quiet and Eoleaf’s AEROPRO 150, our professional-grade model:
| Feature | Dyson’s Big+Quiet | Eoleaf’s AEROPRO 150 |
|--------------------------|---------------------------------------|--------------------------------------|
| **Technologies** | HEPA filter, activated carbon filter | Prefilter, bamboo fiber filter, HEPA filter, activated carbon filter, photocatalysis, UVC sterilization, ionization |
| **HEPA Filter** | Yes, captures 99.95% of pollutants | Yes, captures 99.97% of pollutants |
| **Activated Carbon** | Yes, 430,000 m² surface area | Yes, 1.28 kg weight |
| **CADR** | Not disclosed | 670 m³ |
| **Air Circulation Angle**| 50° | 360° |
| **Fan Speeds** | 2 | 5 |
| **Standby Power Usage** | <0.5W | <2W |
| **Noise Levels** | 43 dB (low) to 55.6 dB (high) | 30 dB (low) to 60 dB (high) |
| **Filter Lifespan** | Not specified | 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: 100m², Technical: 70m² | 120m² |
| **Smart Features** | MyDyson app connectivity | Tuya Smart app, Bluetooth, voice control |
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### Our Analysis
#### Filtration Technologies
Given the price tag, it’s evident that Dyson is charging a premium for an air purifier with just a HEPA filter and an activated carbon filter. Why pay so much for a device that includes only the bare essentials when there are more advanced options available at similar or even lower prices? For instance, our AEROPRO 100 covers the same surface area as the Big+Quiet but costs 30% less.
Moreover, the Big+Quiet lacks UVC sterilization technology, making it harder to combat airborne bacteria and viruses. Without this feature, germs captured by the filter cannot be sterilized, potentially turning the purifier into a breeding ground for pathogens.
#### Lack of CADR
As in our previous reviews, we remain disappointed by Dyson’s refusal to adopt the widely accepted Clean Air Delivery Rate (CADR) standard. Instead, they rely on their proprietary POLAR test. This raises questions: Is their CADR too low to disclose, or have they not tested it at all? At the very least, Dyson could publish both the CADR and POLAR results to give consumers a clearer picture of their product’s performance.
In conclusion, while Dyson’s Big+Quiet may appeal to those seeking a minimalist design, its lack of advanced filtration technologies and transparency in performance metrics makes it an overpriced option compared to competitors like Eoleaf. For anyone serious about improving indoor air quality, we recommend exploring devices that prioritize comprehensive filtration and user-friendly features.