# Which hepa air purifiers have a high Clean Air Delivery Rate (CADR)? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which hepa air purifiers have a high Clean Air Delivery Rate (CADR)?

## Products

### Blueair Blue Signature (Table)
```yaml
product: blueair-blue-signature-table
brand: Blueair
price_gbp: 336.03
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: HEPASilent (HEPA + activated carbon)
noise_level_db: 34.8 - 59.6
coverage_area_sqft: 705
energy_consumption_watts: 38.65
filter_replacement_interval: 9-12 months
clean_air_delivery_rate_cadr: Pollen 450, Dust 434, Smoke 455 CFM
maximum_particle_size_capture: 0.1 microns
```

- **Price:** £336.03 [^1]
- **Summary:** The Blueair Blue Signature is a high-CADR, design-forward air purifier that doubles as a small table and targets large spaces up to 705 sq ft (with maximum coverage cited up to 3,385 sq ft). It uses HEPASilent multi-stage filtration with activated carbon and OdorFence technology, offers smart app control and a motion-activated display, and suits users who want powerful odor removal and a stylish, furniture-like purifier.
- **Additional Sources:** [^2], [^3]

### Alen BreatheSmart 75i V2
```yaml
product: alen-breathesmart-75i-v2
brand: Alen
price_gbp: 596.65
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: True HEPA (H13) with optional activated carbon (Pure, Fresh, Odor options)
noise_level_db: 25-49
coverage_area_sqft: 2800
filter_replacement_interval: 12-15 months
clean_air_delivery_rate_cadr: 347
maximum_particle_size_capture: 0.1
```

- **Price:** £596.65 [^4]
- **Summary:** The Alen BreatheSmart 75i V2 is a high-capacity True HEPA (H13) air purifier with optional high-carbon filters, designed for large open spaces up to 2,800 sq ft. It offers high CADR, low noise operation, Energy Star efficiency, smart sensors, and long filter life, suited for allergy sufferers, large homes, and offices.
- **Additional Sources:** [^5]

### Austin Air HealthMate
```yaml
product: austin-air-healthmate
brand: Austin Air
price_gbp: 631.0
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: True medical-grade HEPA; activated carbon and zeolite (4-stage)
noise_level_db: 42.5 to 66
coverage_area_sqft: 1500
energy_consumption_watts: 61.1; 85.05; 147.6; maximum 115
filter_replacement_interval: 5 years
clean_air_delivery_rate_cadr: 154
maximum_particle_size_capture: 0.3 microns (99.97%) and 0.1 microns (95%)
```

- **Price:** £631.0 [^6]
- **Summary:** The Austin Air HealthMate uses a 4-stage system combining true medical-grade HEPA with 15 lb activated carbon and zeolite to remove particles, gases, and odors. It suits allergy, asthma, and chemical-sensitivity sufferers and is rated for large spaces up to 1500 sq ft with long-lived filters.
- **Additional Sources:** [^7], [^8]

---
## References & Sources
[^1]: Blueair (official), accessed 2026-06-08. https://www.blueair.com/products/blue-signature
[^2]: Live Science (product coverage listing with price), accessed 2026-06-08. https://www.livescience.com/health/blueair-blue-signature-air-purifier-review
[^3]: HouseFresh (review with stated list price), accessed 2026-06-08. https://housefresh.com/blueair-blue-signature-review/
[^4]: Alen, accessed 2026-06-08. https://alen.com/collections/breathesmart-air-purifiers/products/breathesmart-75i
[^5]: Home Depot, accessed 2026-06-08. https://www.homedepot.com/p/Alen-BreatheSmart-FLEX-700-sq-ft-HEPA-Console-Air-Purifier-with-Pure-Filter-for-Allergens-Dust-and-Mold-in-Whites-BreatheSmart-FLEX-Pure/301816930
[^6]: Sylvane, accessed 2026-06-08. https://www.sylvane.com/products/austin-air-healthmate-air-purifier
[^7]: HouseFresh (review page lists specs), accessed 2026-06-08. https://housefresh.com/austin-air-healthmate/
[^8]: Austin Air (official FAQ/specs), accessed 2026-06-08. https://austinair.com/faq/