Hello,
we are currently visiting different construction companies. Everything from KfW100 to KfW55 standards is being offered. Regarding building services, whether heat pumps or gas condensing boilers combined with solar technology for hot water, we are still undecided ourselves.
Now we are wondering if KfW100 would basically be sufficient. With KfW75, there would be an interest rate advantage through subsidies, but I am not sure about that yet, nor have I calculated whether this interest rate benefit is worth it compared to the additional costs of a KfW75 house.
Is there a significant difference in terms of energy performance and costs between KfW100 and KfW75 that justifies the extra expense?
we are currently visiting different construction companies. Everything from KfW100 to KfW55 standards is being offered. Regarding building services, whether heat pumps or gas condensing boilers combined with solar technology for hot water, we are still undecided ourselves.
Now we are wondering if KfW100 would basically be sufficient. With KfW75, there would be an interest rate advantage through subsidies, but I am not sure about that yet, nor have I calculated whether this interest rate benefit is worth it compared to the additional costs of a KfW75 house.
Is there a significant difference in terms of energy performance and costs between KfW100 and KfW75 that justifies the extra expense?
vokono schrieb:
My general advice:
Always build a little better than required! Sustainable, after all! 😎The requirement is only KFW 100. So KFW 70 is really great. ;-)
Thank you for the many responses.
At first, there are no specific requirements. The developer we are considering primarily builds to the KfW 100 standard by default. I was just wondering if it would be worthwhile to build to the KfW 70 standard instead.
Meanwhile, we have decided to install a gas condensing boiler along with solar thermal panels for hot water production. In addition, we want to use a controlled mechanical ventilation system with heat recovery, as I believe this offers more comfort.
At first, there are no specific requirements. The developer we are considering primarily builds to the KfW 100 standard by default. I was just wondering if it would be worthwhile to build to the KfW 70 standard instead.
Meanwhile, we have decided to install a gas condensing boiler along with solar thermal panels for hot water production. In addition, we want to use a controlled mechanical ventilation system with heat recovery, as I believe this offers more comfort.
However, KfW 100 is definitely required—otherwise, there will be no building permit / planning permission. ;-)
As I have mentioned here and elsewhere before: KfW 70 is usually achievable with relatively little effort, especially if you are already considering a controlled ventilation system with heat recovery. I would suggest asking what the upgrade to KfW 70 would cost.
... and now the two quarrellers can continue their argument outside this forum if they want. This back-and-forth isn’t helping me—am I the only one feeling this way?
Best regards
K1300S
As I have mentioned here and elsewhere before: KfW 70 is usually achievable with relatively little effort, especially if you are already considering a controlled ventilation system with heat recovery. I would suggest asking what the upgrade to KfW 70 would cost.
... and now the two quarrellers can continue their argument outside this forum if they want. This back-and-forth isn’t helping me—am I the only one feeling this way?
Best regards
K1300S
K1300S schrieb:
... and the two quarrelers can now continue their argument outside of this forum. This bickering doesn’t help me at all – or am I the only one?I feel the same way; unfortunately, this keeps happening throughout all the posts. As soon as the €uro gets involved, things get heated,... 🙁B
Bauexperte9 Sep 2014 16:12Hello everyone,
Now things have calmed down again 😉
Regards, Bauexperte
Wastl schrieb:
As soon as the €uro takes off, things get crazy,... 🙁
Now things have calmed down again 😉
Regards, Bauexperte
K1300S schrieb:
However, KfW 100 certification is definitely required – otherwise, no building permit/planning permission will be granted. ;-)
As I have mentioned here and elsewhere before: reaching KfW 70 is usually achievable with relatively little effort, especially if you are already considering a controlled ventilation system with heat recovery. So I would ask about the cost of upgrading to KfW 70.
... and now the two debaters can continue their argument outside this forum. This back-and-forth doesn’t help me – or am I the only one?
Best regards
K1300SHello, by “required” I meant it’s not mandatory for us 😉 Of course, we will inquire about the expected costs for KfW 70.
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