Hello,
we have a semi-detached house of 150 sqm (1,615 sq ft) plus a basement, newly built by a developer.
I wanted to ask if it makes sense to retrofit a decentralized ventilation system?
The semi-detached house is KFW 55 standard, and ventilation is planned to be ensured by opening windows (this is the current plan).
Installing a central ventilation system is not possible; the decentralized one would have to be installed by us after handover.
Are there decentralized ventilation systems with built-in air conditioning (for the bedroom)?
we have a semi-detached house of 150 sqm (1,615 sq ft) plus a basement, newly built by a developer.
I wanted to ask if it makes sense to retrofit a decentralized ventilation system?
The semi-detached house is KFW 55 standard, and ventilation is planned to be ensured by opening windows (this is the current plan).
Installing a central ventilation system is not possible; the decentralized one would have to be installed by us after handover.
Are there decentralized ventilation systems with built-in air conditioning (for the bedroom)?
Thank you for your messages.
Unfortunately, I don’t have much knowledge about these topics and am currently trying to educate myself.
We initially tried to become homeowners with a prefab house.
Due to a lack of available land and extremely high prices, it ended up being a developer project in a new residential area. If we hadn’t chosen the developer project, we would still be searching.
First, I wanted to ask if a decentralized ventilation system even makes sense.
Is it even allowed to make so many core drillings as well as install an air conditioning system in a KfW 55 house, potentially creating weak points in the insulation?
Unfortunately, I don’t have much knowledge about these topics and am currently trying to educate myself.
We initially tried to become homeowners with a prefab house.
Due to a lack of available land and extremely high prices, it ended up being a developer project in a new residential area. If we hadn’t chosen the developer project, we would still be searching.
First, I wanted to ask if a decentralized ventilation system even makes sense.
Is it even allowed to make so many core drillings as well as install an air conditioning system in a KfW 55 house, potentially creating weak points in the insulation?
Pacc666 schrieb:
Is it even allowed to make so many core drillings and install an air conditioning system in a KfW 55 house, potentially creating weak points in the insulation?This raises the question: Who is going to pay for it?
Pacc666 schrieb:
I first wanted to ask whether a decentralized ventilation system would even make sense. These or trickle vents are your remaining options. From my point of view, a decentralized mechanical ventilation with heat recovery only makes sense for selected rooms—in my opinion, a central system is more cost-effective for most or even all rooms, but that probably won’t be an option here, since the builder likely wouldn’t agree. However, even with heat recovery, it is just a ventilation system, not an air conditioning system.
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Pacc666 schrieb:
Is it even allowed to make so many core drillings and install air conditioning on a KfW 55 house, potentially creating weak points in the insulation?I think you might run into problems if you want to apply for a KfW loan or other subsidies for your KfW 55 house. Otherwise, better to avoid it.Honestly: just install a decentralized unit in the bathroom and if you choose a quiet one, place one in the bedrooms as well. You won’t suffer for manually ventilating your KfW 55 house. In our building area, out of 12 houses, only 2 have central ventilation, two have decentralized, and the rest still manage fine.
I am definitely in favor of central ventilation, but if it’s not possible, then it’s not possible.
I am definitely in favor of central ventilation, but if it’s not possible, then it’s not possible.
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