Fuel cells require a constant supply of clean air to function properly. Air compressors/blowers are used to force air into the fuel cell stack - where the cell uses oxygen from the air to enable the reaction in the cathode. This means that there are special air supply requirements for fuel cells. To ensure a long service life and high performance, the intake air must be very effectively cleaned of particles in the outside air.

In addition, pollutants such as nitrogen oxides (NOx), ammonia (NH3) and sulphur oxide (SO2) can cause unwanted deposits in the fuel cell and damage it. We use a specially formulated carbon layer to trap these and other harmful gases. Hengst's cathode air filter systems always have a multi-layer structure. Each layer is optimized for a specific task so that the complete system offers reliable protection against all harmful particles and gases in the intake air when all filter stages work together.