Critical discussion of a shading calculation method for low energy building and passive house design

This paper discusses the current implementation of the shading calculation in the passive house verification method. Based on comparison tests of the current method with an advanced shading calculation method shortcomings of the existing method are discussed. It is shown that the current algorithms for static calculation sometimes give erroneous and unreliable results. The impact on the different assessment criteria, energy demand and loads as well as overheating, exceeds acceptable margins of error.