There's a reference design that shows you what would happen without the solar features. At any time, you can alter the design, and see the effects. You can then view the figures, or the graphs to see how your design is likely to perform for each month of the heating season. In all, solacalc is designed to test the benefits of installing passive solar technologies. All the above have graphs associated with each appropriate calculation.
Assistance is by pre-programmed tabbed notebooks and an onscreen calculator to ease data entry.
The help system is 62 pages and includes extensive tables of standard building data, how to use solacalc and details of alternative sources of data, including the web plus a flow chart of the calculation process. Registration brings 3 months of free hot-line support plus free upgrades. Available in English. To unzip solacalc you may need to download FastCounter by bCentral ElectricDesign Designed to be viewed on Microsoft Explorer, at 800x600 resolution, with the font setting set to medium.