2.2.3 Number of Thermal Blocks

In general, the smaller the number of thermal blocks that are defined, the lower the user's effort will be to create the building description. However, if too few thermal blocks are defined, simulation results are likely to be less accurate. In order to simplify ratings, users should define as few thermal blocks as possible, consistent with the other guidance in this section. Normally, the number of thermal blocks in a building should not exceed the number of HVAC zones in the building.