Hi, Im currently busy trying to set up a concrete core activation in the wall of my facade using the software DesignBuilder. I understood that to be able to do this you have to have the HVAC systems in detailed HVAC in order to be able to specify within the construction which layer is the internal source layer which is the concrete. Now, Im having issue with choosing the right HVAC system and setting this up for Design Builder to understand or simulate this as concrete core activation. How can I do this? Thanks in advance.