Hello,
I’m starting a new topic for this because it’s so important to us that it will affect our purchase decision.
I’ve already created two threads about the property:
https://www.hausbau-forum.de/threads/kosten-komplettes-haus-sanieren.30258/
https://www.hausbau-forum.de/threads/bitte-meinungen-zum-altbau-grundriss.30321/
Today I received the cost estimate. Although we requested underfloor heating, the engineer planned with radiators. When I asked about this, I learned the following: Currently, there is a floor construction/screed with a height of 6cm (2.4 inches). (This would be completely removed for underfloor heating, right?) According to him, underfloor heating requires 10cm (4 inches), and if we want a centralized mechanical ventilation system with heat recovery, it needs 15cm (6 inches). We don’t need impact sound insulation on the ground floor because there is only the basement below.
The building plan specifies a floor-to-ceiling height of 2.65m (8 ft 8 in). Adding the removed screed would make it 2.71m (8 ft 11 in). Subtracting 15cm (6 inches) for the underfloor heating and mechanical ventilation, plus about 2cm (1 inch) for the floor finish (we want tiles), I calculate about 2.54m (8 ft 4 in) remaining. Is that still an acceptable ceiling height? We currently have 2.56m (8 ft 5 in) plus a few millimeters. Would you notice a 2cm difference?
Is my calculation correct, or are there additional centimeters to consider?
We would have to somehow adjust the stair step height and raise the door openings, but that’s worth it to us (up to a certain amount).
Of course, I will ask the engineer again, but I would appreciate your opinions and advice!
Thanks 🙂
I’m starting a new topic for this because it’s so important to us that it will affect our purchase decision.
I’ve already created two threads about the property:
https://www.hausbau-forum.de/threads/kosten-komplettes-haus-sanieren.30258/
https://www.hausbau-forum.de/threads/bitte-meinungen-zum-altbau-grundriss.30321/
Today I received the cost estimate. Although we requested underfloor heating, the engineer planned with radiators. When I asked about this, I learned the following: Currently, there is a floor construction/screed with a height of 6cm (2.4 inches). (This would be completely removed for underfloor heating, right?) According to him, underfloor heating requires 10cm (4 inches), and if we want a centralized mechanical ventilation system with heat recovery, it needs 15cm (6 inches). We don’t need impact sound insulation on the ground floor because there is only the basement below.
The building plan specifies a floor-to-ceiling height of 2.65m (8 ft 8 in). Adding the removed screed would make it 2.71m (8 ft 11 in). Subtracting 15cm (6 inches) for the underfloor heating and mechanical ventilation, plus about 2cm (1 inch) for the floor finish (we want tiles), I calculate about 2.54m (8 ft 4 in) remaining. Is that still an acceptable ceiling height? We currently have 2.56m (8 ft 5 in) plus a few millimeters. Would you notice a 2cm difference?
Is my calculation correct, or are there additional centimeters to consider?
We would have to somehow adjust the stair step height and raise the door openings, but that’s worth it to us (up to a certain amount).
Of course, I will ask the engineer again, but I would appreciate your opinions and advice!
Thanks 🙂
Dr Hix schrieb:
The mechanical ventilation with heat recovery system could also be installed elsewhere; it doesn’t necessarily have to be integrated into the floor structure (personally, I’m not a fan of that, since it often requires very small cross-sections with unfavorable duct dimensions, such as oval instead of round).That was also my intention.
Is mechanical ventilation with heat recovery really necessary?
I’m a fan of it, but after all, you don’t have a new build that is completely airtight.
@Winniefred We already took some measurements before but unfortunately didn’t write them down... We’ll have to do it every time. We’ve already received approval to buy the house. It’s important to the owner who the buyer is, which is probably why there hasn’t been a new one so quickly. The house has also been on the market for a while.
@ypg Yes, a mechanical ventilation system with heat recovery is definitely a must for us. On the one hand, because it greatly increases comfort. On the other hand, since we plan to insulate and install triple-glazed windows, it’s probably better to have one.
A decentralized mechanical ventilation system was suggested. We’re worried it might be too noisy. I think having one central unit would be more practical.
@ypg Yes, a mechanical ventilation system with heat recovery is definitely a must for us. On the one hand, because it greatly increases comfort. On the other hand, since we plan to insulate and install triple-glazed windows, it’s probably better to have one.
A decentralized mechanical ventilation system was suggested. We’re worried it might be too noisy. I think having one central unit would be more practical.
Niloa schrieb:
We are glad to hear that, but what would be the alternative?As @Mycraft has already mentioned, a mechanical ventilation system with heat recovery—or its ductwork—can be easily integrated into walls. Usually, you don’t even need to build entire walls; simple vertical shafts here and there will suffice. These can then, for example, be incorporated into built-in shelves. The vents are naturally located within the walls. You just need to be a bit creative and keep in mind that the “new construction standard” of running ducts in the ceiling or floor is not the only option.
Niloa schrieb:
Walls would be great if that works out. There is enough space in the house that we can easily accommodate one or two wall corners 🙂 Oh... isn’t that the house with the entrance hall?
Yes, there are plenty of options with the interior walls – everything is central 🙂
Niloa schrieb:
A decentralized controlled residential ventilation system was suggested. We are worried that it might be too noisy. And I imagine a single unit for everything would be more practical.Your concerns are not unfounded, and the idea that a single unit is more practical is correct as well.
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