The HEPA filters that I recently purchased are exceptional in quality, demonstrating adherence to the rigorous standards set forth in the Philippines for air filtration systems. These filters effectively capture a high percentage of airborne particles, ensuring a healthier environment. In addition to the product's outstanding specifications, the customer service experience was notably positive. The sales representatives approached their roles with professionalism and expertise, making the purchasing process seamless and informative. I would like to highlight Linc He in particular, whose extensive knowledge and engaging communication style greatly enhanced the overall experience, making it not only productive but also enjoyable. Delivery: Very Fast Quality: Very Good Design: Very Good Service: Very Good