Here are some questions to look into:
- What are the actual zone temperatures in EnergyPlus? Are they different than the constant 24C assumed in Kiva?
- What are the boundary conditions settings in Kiva and EnergyPlus (Foundation:Kiva:Settings)? Are they identical? How deep is your deep-ground boundary and what type of boundary condition is it?
- Are the material properties and dimensions identical in both tools?
(Perhaps you can edit your question to add the relevant Kiva YAML inputs and EnergyPlus IDF objects?)
