This is an open assignment. A suggestion for an answer is as follows: In the selection of the team, all relevant special skills should be available, while the number of participants in the team should be as small as possible. It is also important to have a clear structure for responsibilities and competences. The planning team can include planners, the most important crafts and building owners.

Essential characteristics include: annual heating energy requirement, with reference to the living area, not exceeding 15 kWh/m²a; no conventional heating system; high user comfort; total primary energy input at most 120 kWh/m²a.

You can name: orientation of site and building; orientation of windows; solar shading; solar gains.