Product Description. The EdgeGARD® 4-Foot Horizontal Laminar Flow Purifier from Baker provides a work environment that has its own filtered air supply. It is used in a variety of applications including medical research laboratories, hospitals, manufacturing facilities, and other research and production environments. Purifier benches direct HEPA-filtered airflow over the work area to provide a virtually particle-free work area for ISO Class 5 (Class 100) procedures. Purifier benches prevent contaminated room air from entering the work area and contaminating samples. However, they do not provide protection to users and should never be used when working with infectious materials or volatile/toxic chemicals. The EdgeGARD® HF Horizontal Laminar Flow Purifier from Baker. ISO Class 5 purity (for 0. 5 micron particles). Product protection only; not suitable for use with hazardous aerosols. Available in space-saving models. With a spacious work area and bright illumination for maximum productivity and unique high-velocity air circulation slots, Baker's EdgeGARD® HF offers both user comfort and product protection. Baker's EdgeGARD® HF horizontal laminar flow purifier provides HEPA-filtered air and proven product protection, ideal for a range of laboratory applications. Using a patented cabinet design with high-velocity air circulation slots, the EdgeGARD® HF provides precise control of air volume and velocity, maximizing product protection and ensuring Class 100 cleanliness in the laboratory. Equipped with a HEPA supply air filter, the airflow across the work area creates a particle-free work surface. Applications include intravenous mixture preparation, drug preparation, plant cell culture, electronics assembly and more