HVAC Air Details

Under the legacy version of Ladybug tools, it used to be possible to assigned a limit to the flow rate of the HVAC system (Air System Hard Size) as well as temperature, capacity etc. The latest version of LBT doesn’t seem to have the option for limiting the size. Any idea how I might be able to do this? I’ve essentially got a system with a limit to both flow rate and supply temperature and I want to reflect this in my model.

Thanks