Hello,
we would like to build a one-and-a-half-story single-family house with about 125 sqm (1,345 sq ft) plus additional development space in the attic. Without a basement but with a 9 m (30 ft) garage.
We have a plot of land in sight, which we hope to reserve by May. We have already had several appointments with construction companies, including TaC, a developer from Krefeld, and one from Sonsbeck. I feel increasingly uncertain. Both developers offer roughly the same concept, but their prices differ significantly. One says that a ventilation system is not necessary for a KfW 55 solid construction house, while the other says it is very important. I am completely confused. Intuitively, the developer from Sonsbeck was our favorite—until we saw the cost estimate.
It is just too expensive! With TaC, the costs are within our budget, but opinions about the company are mixed.
Does anyone have experience in the NRW area?
Best regards
we would like to build a one-and-a-half-story single-family house with about 125 sqm (1,345 sq ft) plus additional development space in the attic. Without a basement but with a 9 m (30 ft) garage.
We have a plot of land in sight, which we hope to reserve by May. We have already had several appointments with construction companies, including TaC, a developer from Krefeld, and one from Sonsbeck. I feel increasingly uncertain. Both developers offer roughly the same concept, but their prices differ significantly. One says that a ventilation system is not necessary for a KfW 55 solid construction house, while the other says it is very important. I am completely confused. Intuitively, the developer from Sonsbeck was our favorite—until we saw the cost estimate.
It is just too expensive! With TaC, the costs are within our budget, but opinions about the company are mixed.
Does anyone have experience in the NRW area?
Best regards
From a practical perspective, a mechanical ventilation system with heat recovery is not absolutely necessary, but it makes things more comfortable and ensures proper air exchange. If you want one or can afford it, that’s great.
However, my feeling is that owners of mechanical ventilation systems sometimes come across like a kind of “New Jehovah’s Witnesses” group, or like Scientology with an added ventilation system. And that triggers resistance in me. The little devil, the mischievous Karsten demon, just refuses to be convinced.
So, to all of you mechanical ventilation advocates: less preaching, more simply stating “I am satisfied with my mechanical ventilation system. I would buy it again. Period. That’s all.” Karsten
However, my feeling is that owners of mechanical ventilation systems sometimes come across like a kind of “New Jehovah’s Witnesses” group, or like Scientology with an added ventilation system. And that triggers resistance in me. The little devil, the mischievous Karsten demon, just refuses to be convinced.
So, to all of you mechanical ventilation advocates: less preaching, more simply stating “I am satisfied with my mechanical ventilation system. I would buy it again. Period. That’s all.” Karsten
T
toxicmolotof2 May 2017 20:26I definitely don’t air out the house 5 times a day for 3-5 minutes each time and still have no mold issues. Some of what’s suggested here is really exaggerated. I only have 11 windows, but why on earth would I open and close every single one 5 times a day? I only ventilate the rooms that actually need it, and then only when I happen to be nearby anyway. So at most, I spend an extra 5 minutes a day just ventilating. And often not even that.
C
Caspar20202 May 2017 20:44Nordlys schrieb:
From a practical standpoint, it’s possible without a mechanical ventilation system, but having one makes things more comfortable and ensures proper ventilation. If you want it or can afford it, great.toxicmolotow schrieb:
I certainly don’t ventilate five times a day for 3–5 minutes each time and I don’t have any mold.On one hand, we want and need to build increasingly energy-efficient homes and often use blower door tests to identify even the smallest leaks; on the other hand, we open large areas for ventilation—ideally cross-ventilation—to let cubic meters of heat escape from the house.
The comfort aspect is one thing; but a well-designed, energy-efficient building also needs to ensure air exchange without losing all the valuable heat.
And that works very well when you have a mechanical ventilation system with heat recovery.
T
toxicmolotof2 May 2017 21:16Now it gets interesting... regarding energy efficiency and all that. How many watts does a mechanical ventilation system with heat recovery use?
T
Traumfaenger2 May 2017 21:21Grym schrieb:
Open 22 windows on two levels, wait 3-5 minutes; close 22 windows I don’t know your building conditions, but our goal when ventilating is not to have every single window opened five times a day... It’s enough to simply ventilate by opening windows on two sides of the house and then moving on.
Similar topics