Position controlled residential ventilation in the underground basement?

I'm not quite that familiar with it... Since I decided on my system only during the shell construction, it has its place in the attic. But if it should be in the basement, wouldn't it be an idea to integrate a ground heat exchanger? Then you have the system in the basement and don't have to go upstairs first to then go outside?!

@Euro: I will ask about that.

@Perlenmann: Whether that is the case, I do not know either. But since we decided on a gas boiler, it is not really an issue at the moment.

Just as a supplement @Euro: The reliable demand/consumption forecast can actually only be created after we have approved the floor plan including the windows, according to my understanding, or am I mistaken?

@Perlenmann: Whether that is the case, I don’t know either. But since we have decided on a gas boiler, it’s not really an issue at the moment.

I’m not talking about a ground-source heat pump, but rather a ground heat exchanger for the supply air of the controlled residential ventilation system. This way, you have cooler air in summer and warmer air in winter. Furthermore, the problem with light wells as supply/exhaust air should also be solved this way.

I don't understand currently. It still has to suck in / blow out air from outside, right?

...The reliable demand/consumption forecast can actually only be created, according to my understanding, once we have approved the floor plan including the windows, or am I mistaken?

Absolutely correct! The building structure must first be defined. Then the location-related site and climate conditions as well as the individual user behavior are added. From this, the expected demand is determined. The parameters of the intended system lead via JNG or annual performance factor to the consumption (kWh). With this and the specific costs of the respective energy source (€/kWh), the investment sum (possibly the capital service for it) can then be evaluated.

Best regards.