ᐅ Preparation for possible attic ventilation or air conditioning

Hello,
we are currently renovating our new home (existing property) and are planning to convert the attic into living space in the medium term, most likely setting up two children's bedrooms there. Over the past few weeks, I have noticed that the attic gets quite warm.
We will properly insulate the roof, but if that is not enough, we might consider installing an air conditioning system later on.
Therefore, my questions are: What should I prepare now to make adding an air conditioning system easier in the future? I was thinking about a separate electrical circuit (possibly even a three-phase power supply). Does it also make sense to install larger conduits now to later run the ducts for cold air without having to open the walls again or do similar work?

Thanks for your opinions or even better, your experiences!

Regards

Unfortunately, I have nothing to add on this topic, but I am also interested in the answer. I believe that in a house, you should neither freeze nor overheat, so I find the idea of air conditioning very appealing. Don’t forget shutters for any roof windows.

If you do it properly, a split unit will be installed in the ceiling. This means you will need a suspended ceiling. A refrigerant line must run from there to the roof or to an external wall, where electricity will also be required.

The power connection is usually only required at the outdoor unit; the indoor unit then receives power from there.

To achieve effective cooling in both rooms, each room needs its own indoor unit.

Therefore, a DN50 pipe could be installed to the "rear" room so that the power and copper line from the outdoor unit can be easily routed later without having to open up the walls.

Furthermore, each indoor unit requires a condensate drain... meaning a Ø 16/18 mm (approximately 5/8 inch) hose must be led outside from the unit. It is best to provide a conduit for this in advance.

You can also install a split unit in the ceiling of the top floor if it is a timber beam ceiling. For the condensate, condensate pumps can be used, and there are apparently also split units available with built-in condensate pumps.

Yeah... why choose the easy way when you can make it harder and more expensive...