The Helios ELF-ALB 50/30 F7 is a fully synthetic air filter designed to deliver high-efficiency filtration for HVAC systems. Constructed from synthetic filter fleece and supported by a durable Fiberplast frame, this filter has been tested in accordance with VDI 6022 and DIN EN 779 standards. With a filtration class of F7, it is ideal for capturing fine particles, contributing to improved indoor air quality and protecting ventilation system components. The ELF-ALB 50/30 F7 is well-suited for both commercial and residential use where fine filtration is required.