How Air Purifiers Help with Allergies
Millions of Germans suffer from allergies - whether against pollen, dust mites, pet hair or mold spores. A high-quality air purifier can drastically reduce the concentration of these allergens in indoor air and thus provide noticeable relief.
Key Points at a Glance
- HEPA Filter: Remove 99.97% of all particles from 0.3 micrometers
- CADR Value: Indicates cleaning performance in m³/h
- Room Size: Air purifier should handle 4-5 times room volume/hour
- Maintenance: Regular filter replacement every 6-12 months required
Common Allergens in Indoor Air
Pollen
Size: 10-100 micrometers
Main season: Spring and summer. Enter through windows and doors.
Dust Mites
Size: 0.1-40 micrometers (feces)
Year-round problem. Live in mattresses, carpets and upholstery.
Pet Hair/Dander
Size: 2.5-10 micrometers
From cats, dogs and other pets. Very persistent and long-lasting.
Mold Spores
Size: 1-30 micrometers
Occur at high humidity. Particularly concerning for health.
Our Test Criteria for Air Purifiers
In our air purifier test, we placed special emphasis on allergen-specific performance:
Filter Quality
HEPA H13/H14 filter and additional pre-filters for optimal cleaning
CADR Performance
Clean Air Delivery Rate for pollen, dust and smoke
Noise Level
Sound level at different speeds, important for bedrooms
Follow-up Costs
Price for replacement filters and annual operating costs
The Top 10 Air Purifiers for Allergies 2025
1. Dyson Purifier Cool Autoreact TP7A
Intelligent air purifier with automatic detection of particles and gases. HEPA H13 filter and built-in fan for optimal air circulation.
Pros
- Automatic air quality measurement
- 360° air intake
- Fan function in summer
- Very quiet in night mode
Cons
- High purchase price
- Expensive replacement filters
- Unusual design
Room Recommendation
Ideal for: Living rooms, large bedrooms (35-70m²). Air changes: 5x per hour at 35m², 2.5x at 70m².
2. Philips AC2887/10
Solid all-rounder with excellent price-performance ratio. Specifically developed for allergy sufferers with AeraSense technology.
3. Xiaomi Mi Air Purifier 4 Pro
Excellent value for money with smart home integration. Ideal for budget-conscious allergy sufferers with large rooms.
Top 5 Air Purifiers Comparison
| Model | CADR Value | Room Size | Noise Level | Filter Change | Price |
|---|---|---|---|---|---|
| Dyson TP7A | 350 m³/h | 35-70m² | 19-64 dB | 12 months | $649 |
| Philips AC2887/10 | 333 m³/h | up to 79m² | 20-51 dB | 12 months | $349 |
| Xiaomi Mi Air Purifier 4 Pro | 500 m³/h | up to 60m² | 32-64 dB | 6-8 months | $249 |
| Levoit Core 400S | 260 m³/h | up to 40m² | 24-52 dB | 8-12 months | $199 |
| Blueair Blue Pure 211+ | 590 m³/h | up to 50m² | 17-56 dB | 6 months | $299 |
The Right Air Purifier for Every Room
Bedroom (15-25m²)
Important: Very quiet in night mode, no LED light, HEPA filter
Alternative: Philips AC2887/10
CADR needed: 150-250 m³/h
Living Room (30-60m²)
Important: High CADR performance, attractive design, app control
Budget Tip: Xiaomi Mi Air Purifier 4 Pro
CADR needed: 300-500 m³/h
Office/Study (20-35m²)
Important: Moderate noise level, automatic modes, compact size
Alternative: Levoit Core 400S
CADR needed: 200-350 m³/h
Large Rooms (60m²+)
Important: Very high CADR values, robust construction, energy efficient
Alternative: Xiaomi Mi Air Purifier 4 Pro
CADR needed: 500+ m³/h
Maintenance and Operating Costs
Filter Replacement Intervals
Pre-Filter
HEPA Filter
Carbon Filter
Annual Operating Costs (Example 40m² Room)
| Model | Power Costs | Filter Change | Total Cost/Year | Cost/Month |
|---|---|---|---|---|
| Dyson TP7A | ~$45 | ~$85 | ~$130 | ~$11 |
| Philips AC2887/10 | ~$35 | ~$65 | ~$100 | ~$8 |
| Xiaomi Mi Air Purifier 4 Pro | ~$40 | ~$45 | ~$85 | ~$7 |
| Levoit Core 400S | ~$30 | ~$50 | ~$80 | ~$7 |
Tips for Maximum Effectiveness
Proper Positioning
- At least 50cm distance to walls
- Central position in room preferred
- Don't hide behind curtains or furniture
- Don't block air intake and outlet
Optimal Runtime
- 24/7 operation for best results
- Highest level when entering room
- Auto mode for consistent air quality
- 30min on highest level before sleep
Additional Measures
- Regular vacuuming with HEPA filter
- Keep humidity at 40-60%
- Use allergy covers for mattresses
- Replace carpets with smooth floors
Maintenance & Care
- Clean or change pre-filter monthly
- Dust housing regularly
- Clean sensors carefully every 3 months
- Follow filter change reminders
Conclusion: The Best Air Purifier for Allergies
The Dyson Purifier Cool Autoreact TP7A is our test winner for those who have the budget. Automatic air quality measurement and first-class filter performance make it the first choice.
For the best value for money, we recommend the Philips AC2887/10 - specifically developed for allergy sufferers and with solid performance at a fair price.
Budget-conscious buyers choose the Xiaomi Mi Air Purifier 4 Pro, which offers excellent filter performance despite its low price.
More important than the brand is regular use: A cheaper air purifier that runs daily is better than an expensive model that is only occasionally switched on.
