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Kiva

Kiva is a free and open source ground heat transfer calculation tool written in C++. Specifically, Kiva is used to calculate heat loss and gain on a timestep basis from building foundations. The goal is to create a tool that can integrate the multi-dimensional heat transfer into standard building energy simulation engines.

Integrations

Kiva has been integrated into the EnergyPlus whole building simulation engine. More integrations are in the works.