Polysun Simulation Software Community

Dear Pierre Thank you for your question. The answer for your question is that in the second system (when you changed the storage tank) you overheat the building a little. For instance, in April the average temperature in the building 1.1 degree higher in the second system than in the reference one....

My question is why do the Energy losses from infiltration rise (highest rise seen in april), when I'm trying to change the Potable water tank in system 44a to my own created Storage tank with the same configured Controller inputs/outputs? Attached a project file with a system diagram before and afte...