# Which hepa air purifier offers the best value for money under £300? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which hepa air purifier offers the best value for money under £300?

## Products

### Coway Airmega 350
```yaml
product: coway-airmega-350
brand: Coway
price_gbp: 58.81
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: 3-in-1 custom filter (Vacuumable Pre-Filter + Green True HEPA + Activated Carbon)
noise_level_db: 21.5-61.8 dB
coverage_area_sqft: 2640 (1 air change/hour) / 1320 (2 air changes/hour)
energy_consumption_watts: 62 W (typical), up to 65 W reported; 57.95 W measured at top speed
filter_replacement_interval: 12 months
clean_air_delivery_rate_cadr: Smoke 352 cfm; Dust 376 cfm; Pollen 450 cfm
maximum_particle_size_capture: 0.01 microns
```

- **Price:** £58.81 [^1]
- **Summary:** The Coway Airmega 350 is a large-room cylindrical air purifier with a 3-in-1 Green True HEPA + activated carbon filter, high CADR for smoke, dust and pollen, and ENERGY STAR efficiency. It suits users who need whole-home or very large-room coverage and want a replace-once-a-year filter and configurable modes (auto, sleep, turbo, eco).
- **Additional Sources:** [^2], [^3]

### Blueair Blue Pure 411 / Blue Mini Max
```yaml
product: blueair-blue-pure-411-blue-mini-max
brand: Blueair
price_gbp: 74.44
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: Particle + Activated Carbon (HEPASilent™)
coverage_area_sqft: 161
energy_consumption_watts: 10
filter_replacement_interval: 6 months
clean_air_delivery_rate_cadr: 120
maximum_particle_size_capture: 0.1
```

- **Price:** £74.44 [^4]
- **Summary:** Compact 3-speed air purifier with HEPASilent™ particle plus activated carbon filtration, low energy use, and a washable pre-filter. Suited for small rooms, bedrooms, dorms, and nurseries where quiet, efficient filtration is needed.

### Winix Winix 5510 / Winix A231
```yaml
product: winix-winix-5510-winix-a231
brand: Winix
price_gbp: 74.44
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: 4-Stage (Washable pre-filter, AOCTM carbon filter, True HEPA, PlasmaWave)
noise_level_db: 23.5 - 58
coverage_area_sqft: 392
energy_consumption_watts: 0.06 - 45.6
filter_replacement_interval: 12 months
clean_air_delivery_rate_cadr: 252 / 247 / 253
maximum_particle_size_capture: null
```

- **Price:** £74.44 [^5]
- **Summary:** The Winix 5510 is a mid-range WiFi-enabled air purifier with True HEPA, AOC carbon filter, PlasmaWave and AHAM-verified coverage around 392 sq ft, suited for living rooms and open-plan spaces. The Winix A231 is a compact H13 HEPA unit for small rooms (~220-230 sq ft), offering portable performance and a 4-stage filter suited for bedrooms or home offices.
- **Additional Sources:** [^6], [^7]

### Levoit Core 300
```yaml
product: levoit-core-300
brand: Levoit
price_gbp: 63.27
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: True HEPA + Activated Carbon + Pre-filter
noise_level_db: 24
coverage_area_sqft: 219
energy_consumption_watts: 35.5
filter_replacement_interval: 6-8 months
clean_air_delivery_rate_cadr: 141
maximum_particle_size_capture: 0.3 microns
```

- **Price:** £63.27 [^8]
- **Summary:** Three-stage filtration (pre-filter, True HEPA, activated carbon) captures particles down to 0.3 microns and suits bedrooms, offices, and small-to-medium rooms up to ~219 sq ft. It runs quietly in sleep mode and is a budget-friendly option for allergy sufferers and pet owners.
- **Additional Sources:** [^9], [^10]

### Coway Airmega 50
```yaml
product: coway-airmega-50
brand: Coway
price_gbp: 59.55
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: 3-in-1 Filter (Pre-filter + HyperCaptive Filter + Deodorization Filter)
noise_level_db: Sleep as quiet as a whisper; measured ~?
coverage_area_sqft: 500
energy_consumption_watts: 14
filter_replacement_interval: 8 months
clean_air_delivery_rate_cadr: Smoke 66.7, Dust 74, Pollen 95.3
maximum_particle_size_capture: 0.01 microns
```

- **Price:** £59.55 [^11]
- **Summary:** Compact cylindrical purifier with 3-stage HyperCaptive filtration that captures ultrafine particles down to 0.01 microns, designed for small to medium rooms up to 500 sq ft. Suited for bedrooms and living spaces where low noise and low energy use are priorities.
- **Additional Sources:** [^12]

### Shark NeverChange HP152
```yaml
product: shark-neverchange-hp152
brand: Shark
price_gbp: 185.37
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
filter_type: True HEPA Multi-Filter
noise_level_db: 15
coverage_area_sqft: 650
energy_consumption_watts: 26
filter_replacement_interval: 5 years
clean_air_delivery_rate_cadr: null
maximum_particle_size_capture: null
```

- **Price:** £185.37 [^13]
- **Summary:** Compact air purifier with True HEPA NanoSeal multi-filter and Odor Neutralizer Technology that purifies up to 650 sq ft and is engineered for long-lasting (up to 5-year) filter life. Suited for large rooms, bedrooms, and offices where low power use and quiet operation are priorities.
- **Additional Sources:** [^14], [^15]

---
## References & Sources
[^1]: Cowaymega, accessed 2026-06-06. https://cowaymega.com/products/airmega-350
[^2]: Cowaymega (replacement filter) - listing shows product and price page, accessed 2026-06-06. https://cowaymega.com/products/airmega-350-filter
[^3]: Consumer Reports (retailer listings page), accessed 2026-06-06. https://www.consumerreports.org/appliances/air-purifiers/coway-airmega-350/m417270/
[^4]: Blueair, accessed 2026-06-06. https://www.blueair.com/products/blue-pure-mini-max
[^5]: Winix America, accessed 2026-06-06. https://www.winixamerica.com/product/5510/
[^6]: Winix America, accessed 2026-06-06. https://www.winixamerica.com/product/a231/
[^7]: HouseFresh, accessed 2026-06-06. https://housefresh.com/winix-a231-review/
[^8]: The Home Depot, accessed 2026-06-06. https://www.homedepot.com/p/LEVOIT-Core-300-P-Coverage-220-sq-ft-Activated-Carbon-Filter-Large-Room-Air-Purifer-in-White-EAPAPLVNUS0132Y/317951088
[^9]: Best Buy, accessed 2026-06-06. https://www.bestbuy.com/product/levoit-core-300-p-air-purifier-white/J3Y7X9S5S4
[^10]: Levoit (official), accessed 2026-06-06. https://levoit.com/products/core300-p-air-purifier
[^11]: Cowaymega, accessed 2026-06-06. https://cowaymega.com/products/airmega-50
[^12]: ENERGY STAR, accessed 2026-06-06. https://www.energystar.gov/productfinder/product/certified-room-air-cleaners/details/4009116
[^13]: Shark (official), accessed 2026-06-06. https://www.sharkninja.com/shark-neverchange-air-purifier/HP152.html
[^14]: The Home Depot, accessed 2026-06-06. https://www.homedepot.com/p/Shark-NeverChange-650-sq-ft-HEPA-Filter-Outlet-Plug-Air-Purifier-and-Cleaner-in-Grey-w-Timer-for-Dust-Smoke-Bedroom-Office-HP152/329551071
[^15]: Target, accessed 2026-06-06. https://www.target.com/p/shark-hp152-never-change-air-purifier/-/A-91920633