Hello,
of course there are many other options as well. The question that needed to be clarified is which heater or heating system fits best for the planned building. And I also believe that the basis of any planning is a serious estimation of one’s own behavior. Unfortunately, this self-assessment is often missing because it is not really supported by the developers and they also lack experience. Therefore, especially with building services, it is best to first get advice from independent planners or specialized contractors before deciding on a system.