The present paper deals with the new defrosting method by means of the frost sublimation phenomenon with radiant heat. The frost sublimation phenomenon occurs at the triple point of water (273.16 K, 610.5 Pa). The present experimental study focuses on the mass transfer rate of a horizontal frost layer exposed to a moist air flow and radiant heat. It is understood that the mass flux of the frost layer increases with increase of the water vapor mass concentration difference between the frost and main moist air flow, the main air flow velocity, and the infrared radiant heat intensity. The non-dimensional correlation equations of mass transfer, heat transfer and finishing time of the defrosting process have been derived taking into account various parameters.