Controlled residential ventilation in bungalow: Is it necessary to hang down the ceiling?

Funny, I just had my appointment with Heizi/plumbing and talked about a so far unplanned controlled residential ventilation system. In addition to the costs for the actual controlled residential ventilation, he gave me an estimate of the planning and additional costs for thickening the filigree ceiling and modifying the upper floor ceiling. I didn’t question this further during the appointment, since the exact extra cost will in any case come from the general contractor. But he estimated total additional costs of about 18,000 EUR. Is it really only conceivable this way? So do the pipes for the ground floor absolutely have to be in the filigree ceiling? Can’t they be dropped down? Does dropping down actually save anything? He didn’t mention anything about floor installation at all...

Best regards

Tolentino

So the pipes for the ground floor absolutely have to be in the precast concrete slab?

No, you can also work on the raw ceiling and in the walls and also with boxed soffits or suspended ceilings. Whether this is cheaper has to be calculated; it cannot be said in general because everyone charges their own prices.

In our KFW55 bungalow with a cold roof, the ventilation pipes are completely located in the ground floor ceiling, basically between Fermacel, insulation or battens, and the controlled residential ventilation unit hangs under the ceiling. I didn’t want it any other way either, which is why all the ventilation valves are also in the ceiling and we have no grilles in the floor. Additionally, by having the ceiling unit, we have gained wall space in the technical room. But all of this is a matter of taste.

I would also prefer ventilation valves in the ceiling, but I would not install the pipes *in* a concrete ceiling (wooden ceiling is a different matter) without a very good reason. Flat ducts on the raw ceiling (essentially in the insulation) and that's fine.

Minimum ceiling height for living spaces in Berlin is 2.50m, in Brandenburg 2.30m.
When a construction company offers standard, it is often offered with 2.5m.
With controlled residential ventilation and higher floors or suspended ceilings, the entire floor must be higher to reach the 2.5m minimum height,
the construction company often charges extra for larger size and drywall.
Why would you build the ventilation logic of a bunker into a bungalow, using calculation values for windows closed 24h/365 days?
Living in a bungalow with a terrace, garden, light, and fresh garden air is what people are looking for.

I fear airlocks for residents in the coming years and only fixed glazing instead of terrace doors to achieve calculated maximum values
and houses with no windows and only monitors for another 20 years … where will this lead
Best regards, Nida

A controlled residential ventilation system, even in a bungalow, is a great gain in comfort. Because you can still open the windows and doors, but even when they are closed, the air always remains fresh.

It has nothing to do with a bunker. Rather with an office building, restaurant, etc.

But yes, those who have it don’t want to give it up anymore, and those who don’t have it don’t miss it and also don’t understand the other side.