- Enjoy cleaner air with our HEPA Filter designed for efficiency and compatibility with Holmes AER1, BHOR31-1, HAPF30AT, HAPF30AT-U4R, HAPF30ATCS. This 4-Pack also fits select Bionaire models including BAP260, BAP520, BAP815, BAP825, BAP9200, and BAP9700. - Dimensions: 4 11/16" x 10" x 1 5/8". Compact yet powerful, these filters integrate seamlessly into your air purifier. - Effectively traps 99.97% of airborne allergens and contaminants, providing a healthier living environment. Ideal for those with allergies or respiratory concerns, ensuring the air you breathe is free from harmful particles. - Regular maintenance is key; replace pre-filters every 3 months based on your specific environment and usage patterns to maintain optimal performance. - Application Scenarios : - Perfect for families with young children or pets, reducing exposure to allergens. - Essential for individuals with asthma or allergies, creating a cleaner atmosphere at home or in the office. - Great for urban dwellers, filtering out pollutants and dust from the air. Experience the difference of clean air and invest in your health today by choosing our reliable HEPA Filter solution.