ᐅ Preparations for Central Air Conditioning in New Construction

Hello everyone,

We are currently discussing the purchase of a newly built single-family house from a developer. Unfortunately, the developer has decided to use gas boilers for heating throughout the entire development. This means summer cooling via heat pump is not an option. We have been considering making preparations for a future air conditioning system.

This raises the question: What should be installed or planned during the construction phase to make it as easy as possible to retrofit a central air conditioning system later? Is it always necessary to have an air conditioning unit in each room, or are there systems where you only have air outlets in the ceiling and a single control unit located in the utility room?

Thank you very much!

Since no further edits are possible: Are there combined ventilation and air conditioning systems? Does it make sense to use both at the same time?

AllThumbs schrieb:

Combined ventilation and air conditioning systems? Does it make sense to use both simultaneously?

Combined units only make sense for Passive Houses: air-to-air heat pumps. You ventilate, heat, and cool using the air conditioning system. The heat output should be relatively low, with air movement remaining comfortable throughout the year.

Scout schrieb:

Combined units only make sense for Passive House buildings: air-to-air heat pumps. You ventilate, heat, and cool using the same HVAC system. The heating capacity should be relatively low, as air movement remains comfortable throughout the year.

If anything, it will be KfW 55 standard (when using the central ventilation system). For a central air conditioning system, would additional ventilation ducts need to be installed, or are ventilation systems and air conditioning not compatible at the same time?

AllThumbs schrieb:

Summer cooling via heat pump is therefore unnecessary.

Not a significant loss.

AllThumbs schrieb:

We were considering making preparations for a future air conditioning system.

Not a bad idea.

AllThumbs schrieb:

What should be installed or pre-planned during construction to enable the easiest possible later installation of a centralized air conditioning system?

First, you need to decide whether you want a centralized or decentralized system.

For centralized systems, you also need sufficiently sized ventilation ducts.

For decentralized systems, you need power and control cabling, condensate drainage, and refrigerant lines.

AllThumbs schrieb:

Is an individual air conditioning unit required for each room, or are there systems where only air outlets are installed in the ceiling and a single control unit is located in the technical room?

It depends on your budget. Both options exist. The centralized system is naturally more expensive but offers other advantages.

AllThumbs schrieb:

Are there combined ventilation and air conditioning systems? Does it make sense to run both in parallel?

Yes, definitely.

AllThumbs schrieb:

For a centralized air conditioning system, would additional ventilation ducts need to be installed, or do ventilation and air conditioning systems not work together?

They do work together; it just needs to be planned and executed to meet specific requirements and needs. With a typical controlled residential ventilation system, you can’t really cool effectively—even if you install a cooling coil.

Mycraft schrieb:

You first need to decide whether you want a central or decentralized system.
With a central system, you also need sufficiently sized ventilation ducts.

I don’t want to have an air conditioning unit mounted on the wall inside the room. My understanding is that this is possible with a central air conditioning system.
Are the ventilation ducts for the air conditioning the same type as those used for a central ventilation system, or do they require different dimensions?

Do you maybe have a helpful link where I can read more detailed information? I only find marketing material and high-level comparisons of the various types of air conditioning systems.