Air conditioning new building experiences?

So for us, the evening cooling works well, we always cool down to 21.5 degrees (from about 25 degrees) and have about 22-23 degrees in the morning, which is comfortable. At night, the air conditioning is then off and the ventilation system is on. Best regards Sabine

Hi everyone, I find this thread very interesting! I am also currently requesting my air conditioning for the new building and would like my upper floor to be “pleasant.” Attached you will find my floor plan. I would especially like to sleep in cooler temperatures and generally keep the offices on the upper floor cool. Hence the idea of having one indoor unit in the bedroom and one somewhere in a central position in the hallway so that the air can be distributed.

For that, I would go for a 2.5 kW unit (or so) in the bedroom and a somewhat stronger one in the hallway.

What do you think, will that work? And where would you place the position of the two units in the bedroom and hallway respectively?

Thanks in advance!

A 3.5 would most likely be sufficient in the hallway.

Hi everyone, I find this thread very interesting! I am currently requesting my air conditioning for the new building and would like to have my upper floor be "comfortable." Attached you will find my floor plan. I would especially like to sleep in cooler temperatures and also generally keep the offices on the upper floor cool. Hence the idea of having an indoor unit in the bedroom and one somewhere in a central position in the hallway, so that the air is distributed.

For this, I would go for a 2.5 kW unit (or so) in the bedroom and a somewhat stronger one in the hallway.

What do you think, does this work like that? And where would you each place the units in the bedroom and hallway?

Thanks in advance!

I would only install a central air conditioning unit if you have a central ventilation system. Otherwise, there is probably too little air exchange between the rooms. (At 200m3/h and assuming a building volume of 600m3, the air is completely circulated every 3 hours.) Ideally, install an enthalpy heat exchanger at the ventilation system, so that the supply air from outside transfers the humidity from the dehumidified exhaust air. This way, the supply air already enters the house with reduced temperature and humidity, especially the dehumidification of an air conditioner makes it comfortable.

We will do it as described, with one unit each on the ground floor and upper floor.

I would only do a central air conditioning unit if you have a central ventilation system. Otherwise, there is probably too little air exchange between the rooms. (At 200m3/h and an assumed building volume of 600m3, completely recirculated once every 3 hours) Ideally, install an enthalpy heat exchanger on the ventilation system so that the supply air from outside transfers the humidity from the dehumidified exhaust air. This way, the supply air already enters the house with reduced temperature and humidity, especially the dehumidification of an air conditioner makes it comfortable.

We will do it as described, with one unit each on the ground floor and upper floor.

Thanks for the tip. We have indeed planned a central ventilation system. However, I would have now designed the air conditioning independently of that...

edit: Thanks also for the tip about the enthalpy heat exchanger! We have planned that too, but only 1-2 years after moving in. I've often read that you should consciously NOT use it in the beginning to better get rid of the construction moisture...

Yes, these are two completely independent systems and both make sense in today’s houses. If the money is there, then definitely have either one or the other or both installed. Of course, it would be ideal if both work together and not against each other.