ᐅ KfW 55 according to the new Energy Saving Ordinance (EnEV)
Created on: 24 Jun 2016 13:13
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Goldi09111
Hello everyone,
Since we will probably be able to purchase a plot of land next year, we plan to have more discussions with construction companies over the coming weeks.
After reading various topics here, we are wondering what the best approach is to achieve the KFW 55 standard.
The background is that through the KFW standard, we can obtain very well-subsidized loans from the Saxon Development Bank (SAB).
Our main requirement is a controlled ventilation system, which we know from friends, and since we cannot or do not want to ventilate daily, the additional investment is worth it to us.
We honestly don’t mind whether we choose a gas condensing boiler or a ground-source heat pump; it should simply be the most cost-effective option in the overall investment package.
We are a family of four (ages 30, 30, 3, 4 weeks) and want to build around 140–150m2 (1500–1600 sq ft), including a home office for my wife. The plot is about 900m2 (9700 sq ft) and fully south-facing.
If any further information or conditions are needed, please let me know.
Thank you
Goldi
Since we will probably be able to purchase a plot of land next year, we plan to have more discussions with construction companies over the coming weeks.
After reading various topics here, we are wondering what the best approach is to achieve the KFW 55 standard.
The background is that through the KFW standard, we can obtain very well-subsidized loans from the Saxon Development Bank (SAB).
Our main requirement is a controlled ventilation system, which we know from friends, and since we cannot or do not want to ventilate daily, the additional investment is worth it to us.
We honestly don’t mind whether we choose a gas condensing boiler or a ground-source heat pump; it should simply be the most cost-effective option in the overall investment package.
We are a family of four (ages 30, 30, 3, 4 weeks) and want to build around 140–150m2 (1500–1600 sq ft), including a home office for my wife. The plot is about 900m2 (9700 sq ft) and fully south-facing.
If any further information or conditions are needed, please let me know.
Thank you
Goldi
C
Caspar202024 Jun 2016 14:56There are simply some key factors to consider. You should take a look at the KfW reference calculation. After that, you can proceed with construction, but all components must meet these reference values; otherwise, an individual assessment is required.
I would recommend contacting an energy consultant.
Also, what do your contractors say? Often, they have experience with specific approaches.
And what kind of house are you planning to build? Or rather, which construction method?
I would recommend contacting an energy consultant.
Also, what do your contractors say? Often, they have experience with specific approaches.
And what kind of house are you planning to build? Or rather, which construction method?
G
Goldi0911124 Jun 2016 15:47Ok, I will take a look at the reference calculation.
We will be talking to the construction companies in the coming weeks. We already had an initial meeting with an architect, who recommends and usually installs only brine-to-water heat pumps without mechanical ventilation with heat recovery—he doesn’t think much of the latter.
At the moment, we are aiming for a townhouse-style house or a two full-story building, which, according to the current development plan, is not possible. This will be clarified with the local building authority / planning office in the next few weeks. However, I could also be satisfied with a regular single-story house with a pitched roof.
Because of the large plot, I can well imagine using ground collectors or trench collectors, but unfortunately, only a few providers offer these, and they have very little experience with them.
We will be talking to the construction companies in the coming weeks. We already had an initial meeting with an architect, who recommends and usually installs only brine-to-water heat pumps without mechanical ventilation with heat recovery—he doesn’t think much of the latter.
At the moment, we are aiming for a townhouse-style house or a two full-story building, which, according to the current development plan, is not possible. This will be clarified with the local building authority / planning office in the next few weeks. However, I could also be satisfied with a regular single-story house with a pitched roof.
Because of the large plot, I can well imagine using ground collectors or trench collectors, but unfortunately, only a few providers offer these, and they have very little experience with them.
C
Caspar202024 Jun 2016 15:58Goldi09111 schrieb:
Mechanical ventilation with heat recovery (not a big fan of it).Ask him if he wants to put a plastic bag over his head (without holes).
Definitely consult other architects as well.
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Goldi0911124 Jun 2016 16:07Yes, the curious thing is that several architects think this way, no idea why. It might possibly make the planning easier.
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Bauexperte24 Jun 2016 17:42thelastscout85 schrieb:
Hello everyone,
is it possible to meet the KfW55 standard using a mechanical ventilation system with heat recovery, a solar system with buffer tank, and a gas condensing boiler? Or rather, what else would be needed to achieve this standard? Solid masonry — probably wall construction thicker than 36.5cm (14 inches) — and insulation… lots of insulation.
Could you please avoid using Tapatalk? Every post looks like an advertisement for your phone’s app. Thanks 🙂
Best regards, Bauexperte
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