These compact incinerable filters ePM10 80% are used in the HERU T energy recovery units. The filter kit contains two filters. Energy efficient air filter classes according to EN ISO 16890. ePM1: Filtration efficiencies 50–95%. Particle size up to 1 µm. ePM2,5: Filtration efficiencies 50–95%. Particle size up to 2.5 µm. ePM10: Filtration efficiencies 50–95%. Particle size up to 10 µm. Coarse: Filtration efficiencies not required. Particles all sizes.