In This book detail design development and evaluation procedure have been undertaken for composite solar appliances may increase the efficiency and reliability without reducing the quality of product and polluting environment.So in order to meet the requirements of cooking, drying, heating and desalination for domestic purpose, composite solar appliances are required. Keeping in view the importance of multiple solar appliances for domestic applications, work on solar dryer cum solar cooker and solar water heater cum solar desalination have been initiated