# ... — 经过验证的规格比较

> 所有规格数据均已通过官方渠道验证。

What are the quietest whole house air purifiers available?

## 产品列表

### Alen BreatheSmart 25i
```yaml
product: alen-breathesmart-25i
brand: Alen
price_gbp: 132.21
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
noise_level: 20 to 40
filter_types: Essential HEPA, Advanced HEPA with carbon, Ultimate HEPA with odor neutralizer
coverage_area: 400
energy_consumption: 0.8 to 20
air_changes_per_hour: 5
maximum_particle_size_capture: 0.1 micron
```

- **价格:** £132.21 [^1]
- **概述:** The Alen BreatheSmart 25i is a compact, Wi-Fi-enabled air purifier designed for bedrooms, nurseries, home offices, and other small spaces up to 400 square feet. It offers HEPA-based filtration, optional carbon and odor-neutralizing filter choices, automatic air-quality sensing, and quiet operation from 20 to 40 dB.
- **最适合:** 适合希望选择市面上最安静的全屋空气净化器之一的人群，因为其噪音水平仅为 20 至 40 dB，同时其 HEPA 过滤功能可捕获小至 0.1 micron 的颗粒物。

### Alen BreatheSmart FLEX
```yaml
product: alen-breathesmart-flex
brand: Alen
price_gbp: 286.59
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
noise_level: 25-50
filter_types: True HEPA H13 Pure, Fresh, and Odor filters
coverage_area: 700
energy_consumption: 0.8-50
air_changes_per_hour: 2
maximum_particle_size_capture: 0.1 micron
```

- **价格:** £286.59 [^2]
- **概述:** The Alen BreatheSmart FLEX covers rooms up to 700 square feet and uses True HEPA H13 filter options to capture airborne particles larger than 0.1 micron. Its WhisperMax pink-noise operation, compact design, and lifetime guarantee suit bedrooms, home offices, allergy sufferers, and other medium-sized living spaces.
- **最适合:** 适合寻求安静全屋空气净化的人群，因为其运行噪音为 25-50 dB，采用舒缓的粉红噪声，并且每 30分钟 可净化 700 square feet 的空间。

---
## 参考来源
[^1]: Alen, 访问日期 2026-09-13. https://alen.com/products/breathesmart-25i
[^2]: The Home Depot, 访问日期 2026-09-13. https://www.homedepot.com/p/Alen-BreatheSmart-FLEX-700-sq-ft-HEPA-Console-Air-Purifier-with-Pure-Filter-for-Allergens-Dust-and-Mold-in-Metallics-BreatheSmart-FLEX-Pure-Stainless/301816918