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Heating costs calculation by professionals for professionals. You can create, involving site-specific climate data and energy prices can make meaningful comparisons of different types of heating systems. You can send the result directly as a PDF formatted file to the customer. Available for new installations and plant renovation - the e-APP is saving both for heating. To use the full extent of the Spar-E APP you need a user's access. Details can be found in "Saving e-support" or at