THESIM Earth is a program that computes the loss of heat of building components touching the ground over the year with high precision. It takes multi-dimensionality of heat convection and thermal storage into consideration.
Components touching the ground are far harder to model than components touching only the air. Most programs approach this problem with approximation algorithms, which has the disadvantage that they are not useful for many real-world problems. An adequate evaluation of the loss of heat requires a three-dimensional transient computation. THESIM Earth has been developed to make this method of computation easy to use and strongly increase planning safety.