Industrial dehumidification involves the process of removing moisture as well as controlling humidity. For example, warehouses that store grains need a controlled climate to avoid mildew and other moisture-related issues that can ruin or spoil the product. Refrigerant and desiccant dehumidifiers are used to reduce or maintain the level of humidity. Refrigerant dehumidifiers pass the air over a cold coil, cooling the air to the point where its water vapor begins to condense. Instead, desiccant dehumidifiers pass the air through a rotor containing a moisture-absorbing material. Commercial dehumidifiers are somewhat similar to their industrial counterpart in terms of function. The only big difference is the scale at which the equipment is being used.