Beat Hay Fever with Air PurifiersUK 2025 Guide
15-20% of UK residents suffer from hay fever. HEPA air purifiers remove 99.97% of pollen particles, providing significant relief during peak season (March-September).
Proven Effective
Clinical studies show 60-95% reduction in indoor pollen exposure with HEPA air purifiers
Affordable DIY
Build a Corsi-Rosenthal box for £50-100 or PC fan purifier for £150-200
24/7 Relief
Run continuously during pollen season (March-Sept) for best results. Energy cost £10-30/year
UK Pollen Season Calendar
March-April
Tree pollen (birch, oak, ash)
May-July
Grass pollen (peak season)
August-September
Weed pollen (nettle, dock)
Best Air Purifiers for Hay Fever
DIY Corsi-Rosenthal Box
Best Value£50-100 | CADR: 600-850 CFM (1,020-1,445 m³/h)
- Captures 90%+ of pollen particles (10-100 microns)
- 15-45 minute build with UK-available parts
- Covers up to 100m² at 5 ACH
- Filter replacement every 3-6 months: £60-80
PC Fan Build (CleanAirKits)
Quietest£150-200 | CADR: 525+ m³/h
- Ultra-quiet 30-37dB (ideal for bedroom use)
- Energy efficient: 11W = £23/year @ £0.24/kWh
- MERV-13 filtration (captures 99%+ pollen)
- Free UK shipping on orders over £100
Tips for Maximum Hay Fever Relief
Placement Strategy
- • Run in bedroom overnight (8 hours clean air)
- • Keep windows closed 5am-10am (peak pollen)
- • Position 1-2m from bed
- • Run continuously March-September
Maintenance Schedule
- • Vacuum pre-filter weekly
- • Replace HEPA filter every 6-12 months
- • Start 2 weeks before symptoms begin
- • Clean or replace when airflow decreases
Running Costs (UK Energy Prices)
| Usage Pattern | Power | Cost/Year |
|---|---|---|
| PC Fan (24/7, year-round) | 11W | £23 |
| CR Box (24/7, March-Sept only) | 80W | £98 |
| Commercial HEPA (24/7, seasonal) | 40W | £49 |
Based on £0.24/kWh average UK electricity price (October 2025)
Calculate Your Room's Air Changes Per Hour (ACH)
For hay fever relief, aim for 5-6 ACH minimum. Use our free calculator to determine the right purifier size for your room.
Free ACH CalculatorReady to Beat Hay Fever?
Start with our DIY guide or shop pre-built units with the STAROFFER promo code for 10% off