Hello,
we plan to build a house next year, preferably a turnkey project.
Now the contractor said we should definitely submit the building permit / planning permission application this year to save 7,000 euros. Because from 1.1.2016 the energy-saving regulations will change.
What do you think about that?
Thanks for your answers.
we plan to build a house next year, preferably a turnkey project.
Now the contractor said we should definitely submit the building permit / planning permission application this year to save 7,000 euros. Because from 1.1.2016 the energy-saving regulations will change.
What do you think about that?
Thanks for your answers.
Obviously, it is more practical to submit the application this year, but for that, you need a fully planned house. If you are only just starting now, it will become very, very tight. The general contractors I am currently in final discussions with all say that for over a month now, they have been clearly informing new clients that it will no longer be possible to obtain a building permit / planning permission this year.
It looks like it, but without KfW funding. Currently, the statement is that it doesn’t even meet the KfW 70 standard, despite insulation that would be somewhere between KfW 55 and KfW 40. I actually expected it to at least reach KfW 70, but the calculations are designed to favor electric heating (heat pumps) and systems (mechanical ventilation with heat recovery) while unfairly penalizing other technologies. This has little to do with physical laws.
The KfW funding isn’t that great either. For KfW 70, you get a €50,000 (around $54,000) low-interest loan. But the saved interest isn’t significant. It’s not really worth putting in a lot of effort just for that.
Best regards,
Andreas
The KfW funding isn’t that great either. For KfW 70, you get a €50,000 (around $54,000) low-interest loan. But the saved interest isn’t significant. It’s not really worth putting in a lot of effort just for that.
Best regards,
Andreas
andimann schrieb:
The KfW efficiency levels are not really relevant. The extra effort you have to put into the house to reach KfW XYZ will never pay off in your lifetime. And you can basically ignore any subsidies. Respect!
Do you know this because you have calculated all construction projects?
Such a blanket statement is worthless,...
andimann schrieb:
I actually expected at least KfW 70, but the calculations are designed to heavily favor electric heating (heat pumps) and systems (mechanical ventilation with heat recovery) while unfairly penalizing other technologies. Can you provide solid evidence for this statement? The change in the primary energy factor that benefits heat pumps is indeed justified.
No, I haven’t calculated all construction projects in detail. Nor have I claimed to have done so.
But you can very quickly see the (economic) pointlessness of a mechanical ventilation system with heat recovery:
Our house of nearly 180 sqm (around 1,937 sq ft) will result in about 600 € gas costs (currently, we have 130 sqm (around 1,399 sq ft) at about 400 €, even with worse insulation).
Even if the mechanical ventilation system saves you a third of your heating costs (which is certainly an unrealistic and overly optimistic assumption), that means savings of around 200 € on heating. With investment costs of roughly 10,000 € for such a system, you’re basically looking at interest costs equivalent to financing the installation.
Funny little additional details like depreciation (after 20 years it’s probably worn out, so about 500 € per year), filter costs (somewhere between 50 and 150 € per year), maintenance, repairs, and electricity consumption (altogether probably another 100 € per year) haven’t even been factored in yet.
You can play around with the numbers as much as you want: you will never get to an economic business case.
Such a mechanical ventilation system typically costs between 500 and 1,000 € a year—that’s more than the heating costs in a well-insulated house!
In other words, whether or not installing a mechanical ventilation system helps you achieve a better KfW standard and therefore saves you 1,000-2,000 € in interest doesn’t really matter—you can basically ignore that!
Now, the fact that a mechanical ventilation system can provide a certain level of comfort and is especially beneficial for people suffering from hay fever is a different matter. Everyone has to decide for themselves whether it’s worth the money.
But installing a mechanical ventilation system solely to reach a better KfW standard? No, that’s pointless.
Best regards,
Andreas
But you can very quickly see the (economic) pointlessness of a mechanical ventilation system with heat recovery:
Our house of nearly 180 sqm (around 1,937 sq ft) will result in about 600 € gas costs (currently, we have 130 sqm (around 1,399 sq ft) at about 400 €, even with worse insulation).
Even if the mechanical ventilation system saves you a third of your heating costs (which is certainly an unrealistic and overly optimistic assumption), that means savings of around 200 € on heating. With investment costs of roughly 10,000 € for such a system, you’re basically looking at interest costs equivalent to financing the installation.
Funny little additional details like depreciation (after 20 years it’s probably worn out, so about 500 € per year), filter costs (somewhere between 50 and 150 € per year), maintenance, repairs, and electricity consumption (altogether probably another 100 € per year) haven’t even been factored in yet.
You can play around with the numbers as much as you want: you will never get to an economic business case.
Such a mechanical ventilation system typically costs between 500 and 1,000 € a year—that’s more than the heating costs in a well-insulated house!
In other words, whether or not installing a mechanical ventilation system helps you achieve a better KfW standard and therefore saves you 1,000-2,000 € in interest doesn’t really matter—you can basically ignore that!
Now, the fact that a mechanical ventilation system can provide a certain level of comfort and is especially beneficial for people suffering from hay fever is a different matter. Everyone has to decide for themselves whether it’s worth the money.
But installing a mechanical ventilation system solely to reach a better KfW standard? No, that’s pointless.
Best regards,
Andreas
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