The fuel saving calculated according to defined model for wasted air temperature from 40 and 50 °C with applying solar collector and recuperating heat exchanger. In function of burnt gas amount reduction in energy plant at dryer for camomile and mint, pollution of human environment reduction, and at the end environmental air the reduction of fuel consumption was analysed. Results showed that 41-53% fuel saving could be obtained for maximum air flow and 56-59% for minimum air flow.