The RETScreen Software Solar Water Heating Model can be used worldwide to evaluate the energy production and savings, costs, emission reductions, financial viability and risk for solar water heating projects, ranging in size from solar collectors for small-scale domestic hot water applications, for indoor and outdoor swimming pools for residential, commercial and institutional buildings, and for large-scale industrial processes and aquaculture applications, to improved water heating system designs including solar collectors installation, hot water temperature and use reduction, and improved pipe insulation. The software contains a database of typical daily hot water use for loads such as houses, apartments, hotels and motels, hospitals, offices, restaurants, schools, laundry rooms and car washes. The software (from Canada, available in multiple languages) also includes product, project and climate databases, and a detailed user manual.