Box Fan Air Purifier
Convert any 20-inch box fan into an effective air purification system.
- Under $50 total cost
- 5-minute assembly
- Portable design
- High airflow
- Energy efficient
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CR Box UK: Build in 30 mins for under £199 (VAT included). Free UK shipping (2-3 days). True H13 HEPA 2.4x more efficient than Dyson MERV filters. Energy Star 2025 certified. Trusted by NHS, schools & offices.