ᐅ Modernist Concrete Villa with Cavity Wall Insulation – Experiences

Created on: 11 Sep 2018 07:32
R
rick2018
Hello everyone,

I just wanted to briefly introduce myself and say thank you.

For about a year and a half, I have been a silent reader here to gather inspiration and especially to gain more knowledge about construction technology.

Now a bit about me:
After more than a year of searching for a plot of land, I was able to purchase one from a developer who couldn’t move forward quickly with his plans.
So we found our dream plot (good location, 2500 m² (0.62 acres), slight slope, underground private spring that we have to preserve and are allowed to use).
There was an old house on the property, which we have since demolished.
There is no zoning plan, so §34 applies. During an initial informal inquiry at the building authority, almost everything we planned was rejected.
So we submitted an official preliminary building inquiry, involved the right people, and had lengthy discussions. In the end, we received a positive decision.
Therefore, there is nothing standing in the way of the building permit. The building permit should be granted within the next few weeks as there are no changes from the preliminary inquiry.

My wife (37) and I (36) want to build a Bauhaus-style villa in southern Baden-Württemberg.
It will be constructed from concrete (with core insulation) or in combination with insulated precast elements.
A lot of glass (full-glass system), textile shading, KNX, fast network both wired and wireless, strong mechanical ventilation with additional cooling coils, stainless steel pool, large cistern, and more.
The electrical planning must be 100% spot on since it’s almost impossible to make changes afterward.
Since I am friends with an architect from a larger firm, it was clear which route we would take. Such a house can basically only be realized with an architect.
I also personally know the electrician and KNX system integrator, as well as the owners and work approach of the heating, plumbing, and ventilation companies involved.
Some trades have already been contracted, and part of the equipment has already been ordered.

I’m really looking forward to getting started and to the final result. The goal is to move in by the end of 2019.

Once again, many thanks for the information I have received from you so far.
If you have any questions, just let me know.

Attached is the design, though not the final version. There have been a few minor changes.

Greetings from Swabia

Modern villa with flat roofs, terraces, glass surfaces, green surroundings – several views.
J
Jenpa
7 Jul 2019 09:06
So you use air conditioning and controlled mechanical ventilation as two separate, central systems? For me as a layperson: how is the distribution of cool air handled? Is it through a separate duct system with separate outlets similar to the controlled mechanical ventilation? Or do you use split units (which I don’t think is the case)?
rick20187 Jul 2019 10:23
We have only one duct system.
We have a large ventilation unit (Helios air1 XH series). An air conditioning unit is integrated into the supply air. Depending on the setting, the air either passes through the bypass or through the heat exchanger.
J
Jenpa
7 Jul 2019 10:56
Okay, thanks. So, figuratively speaking, this means that the mechanical ventilation system and the air conditioning unit share the ductwork, and you either use the mechanical ventilation system or the air conditioning unit, which means the air conditioning component can be retrofitted. Did I understand that correctly?
rick20187 Jul 2019 11:08
Not exactly
The ventilation unit always distributes the air.
When passive cooling is used, the air is drawn in through the ground, passed through the bypass (meaning it does not go through the heat exchanger), and blown into the house. During active cooling, the cooling unit also operates, and the air likewise flows through the bypass.
For pure ventilation function, the air passes through the heat exchanger.
So, there is a duct system, a large ventilation unit, and a large air conditioning unit.
S
Steffen80
7 Jul 2019 20:57
It only has disadvantages for me. Why not use a separate air conditioning system that efficiently cools the air only in the specific room?
rick20187 Jul 2019 21:19
Because we wanted it to be cool everywhere. At this size, a central solution also makes more sense.

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