  Simulation codes of thermal behaviour could significantly improve housing
construction design. Among the existing software, CODYRUN and TRNSYS are
calculations codes of different conceptions. CODYRUN is exclusively dedicated
to housing thermal behaviour, whereas TRNSYS is more generally used on any
thermal system. The purpose of this article is to compare these two instruments
in two different conditions . We will first modelize a mono-zone test cell, and
analyse the results by means of signal treatment methods. Then, we will
modelize a real case of multi-zone housing, representative of housing in wet
tropical climates. We could so evaluate influences of meteorological and
building description data on model errors.
