The HK & EL Carbon Filter series offers a range of high-quality carbon filters for odor removal and air purification in ventilation systems. The HK series (HK50, HK100, HK150) is designed as a heavy-duty solution with capacities from 1250 m³/h to 3750 m³/h , while the EL2500 offers a lighter version with 2500 m³/h . All filters have a 250 mm flange and are made of steel with a thick bed of activated carbon, ideal for medium to very large grow rooms. The lifespan is approximately 18-24 months with normal use.