Sustainable development demands a sustainable supply of energy resources that, in the long term, is readily and sustainably available at reasonable cost and can be utilized for all required tasks without causing negative environmental and societal impacts. Better designed drying systems can contribute significantly to meeting society’s desire for more efficient, environmentally benign energy use and for sustainable development of the industry for drying applications. By reducing energy consumption, the utilization of sustainable drying systems results in two significant environmental benefits: (i) the conservation of fossil fuels through efficiency increases and/or fuel substitution, and (ii) reductions in emissions of such pollutants as CO2, SO2, NOx and CFCs.