Product Price Filter Types Coverage Area (sq ft) Air Changes per Hour Clean Air Delivery Rate Maximum Noise Level (dB) Energy Consumption (watts) Filter Replacement Interval
Clorox 11030 Medium Room Air Purifier
US
Pre-filter; True HEPA; Activated carbon 225 30 6-12 months

Three-stage 360° filtration (pre-filter, True HEPA, activated carbon) with PM2.5 display and auto mode for medium rooms; Energy Star certified and includes a whisper-quiet 30 dB sleep setting. CADR ratings are 148 CFM (smoke), 154 CFM (dust), 160 CFM (pollen), making it suitable for regular household allergen and particulate reduction.

★ Ideal for

Good value under £300 for medium rooms because it offers True HEPA filtration, CADR ~150 CFM and a 225 sq. ft. recommended room size while being Energy Star certified.

Levoit Core 300-P
US
£63.52 Pre-filter, HEPA, Activated carbon (pelleted) 262 54.5 35.5 6-8 months

Compact tabletop air purifier with a 3-stage filter (pre-filter, HEPA-grade main filter, pelleted activated carbon) and VortexAir/QuietKEAP technologies; strong CADR for smoke, dust and pollen and suitable for medium rooms. Offers child lock, sleep mode and timer, making it easy to use in bedrooms, kitchens or small living areas.

★ Ideal for

Best value under £300 because it delivers high CADR (Smoke 126 CFM; Dust 134 CFM; Pollen 154 CFM), covers ~262 sq ft, and costs little up front compared with its cleaning performance.

Winix Winix 5510 / A231
US
£149.47 Pre-filter, True HEPA, Activated carbon, PlasmaWave Up to 53.4 12 months

The Winix 5510 is a large-room air purifier with a four-stage system (pre-filter, activated carbon, True HEPA and PlasmaWave) and smart app control; it targets high CADR performance for dust and particulate removal and includes filter-life indicators. The A231 is the compact variant sharing Winix filtration tech and suited for smaller rooms. Both suit users wanting strong particulate removal with app control and low maintenance (12-month filter interval).

★ Ideal for

Suitable for the question because the 5510 delivers high AHAM CADR ~252-253 CFM and a 12-month filter interval, offering strong particulate cleaning for large rooms under typical £300 budgets.