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What to do If CFT calculation is error? * CTF calculation convergence problem for Construction="FLOOR_CONSTRUCTION". ..

* CTF calculation convergence problem for Construction="FLOOR_CONSTRUCTION". ...with Materials (outside layer to inside) (outside)="1M_GROUND" The Construction report will be produced. This will show more details on Constructions and their materials. Attempts will be made to complete the CTF process but the report may be incomplete. Constructs reported after this construction may appear to have all 0 CTFs. The potential causes of this problem are related to the input for the construction listed in the severe error above. The CTF calculate routine is unable to come up with a series of CTF terms that have a reasonable time step and this indicates an error. Check the definition of this construction and the materials that make up the construction. Very thin, highly conductive materials may cause problems. This may be avoided by ignoring the presence of those materials since they probably do not effect the heat transfer characteristics of the construction. Highly conductive or highly resistive layers that are alternated with high mass layers may also result in problems. After confirming that the input is correct and realistic, the user should contact the EnergyPlus support team. * Fatal ** Program terminated for reasons listed (InitConductionTransferFunctions)

Material, 1m_Ground, !- Name Smooth, !- Roughness 2, !- Thickness {m} 0.02, !- Conductivity {W/m-K} 1200, !- Density {kg/m3} 2192, !- Specific Heat {J/kg-K} 0.9, !- Thermal Absorptance 0.5, !- Solar Absorptance 0.5; !- Visible Absorptance

Construction, Floor_Construction, !- Name 1m_Ground; !- Outside Layer