Hi I am new to E+ and using the 8.7 platform. I have a unit cube for which I am trying to find the different heat gain/loss quantity. For simplicity I have the same construction and outdoor criteria for all surfaces, with ground factor equal to 0 for each sides. I have provided with a zeroMass wall of R=1. Inspite of that I am getting different energy gains from walls, roof and floor. How is this possible? How can I get around with this issue?