Microwave drying is based on the absorption of radiation energy. The molecules of water and most resins which are placed in a strong electromagnetic field start vibrating. The vibration causes the molecules to rub against one another, producing heat. In our devices microwaves permeate into the non-conductive materials, such as building materials (brick, concrete, sheetrock and wood.), and are dampened slightly as they are distributed within these materials. The water in a wet wall absorbs the microwave energy very efficiently - several thousand times more efficiently than dry material. As a result, a high frequency field, such as a microwave, causes the molecules of water contained in the material to move and rub against one another. As a result of that rubbing, a large amount of heat is produced, which causes the water contained in the wall to evaporate and disappear from it. That is, the drying of the wall is not done through the heating of the material, but by the direct impact of microwaves on the water contained in the wall structure. Water evaporation is another effect of heating the surrounding material.

The heating process of the material in an electromagnetic field is affected by the factor of dielectric losses of the heated material (the amount of produced heat is proportional), the thermal capacity of the material, the dielectric material constant (the higher the constant, the greater the concentration of the electromagnetic field within it) as well as the thermal conductivity factor. The value of the dielectric constant of water and its dielectric loss factor is high – this is the reason why the moisture evaporates so quickly from walls and floors using this method.