Hello fellow home builders,
I’m sure this topic has been discussed here quite often. However, I couldn’t find any entries on it right away, so I’m asking my questions quite specifically. We are currently looking around the market regarding house construction.
It seems that there are four builders we could imagine building a house with.
Now the question is whether we want/should build a KfW70 or a KfW55 house.
Which option would you recommend? Also, considering the upcoming Energy Saving Ordinance 2012 – does anyone already know what it will look like?
Are the additional costs worth it in relation to the energy savings?
One builder, Hanlo Häuser, basically builds KfW70 houses and says that is sufficient. According to them, the additional costs are not offset by the energy savings. The walls at Hanlo have a U-value of 0.13, which is quite good. However, the standard is only double-glazed windows. The standard heating system is an air-source heat pump.
Otherwise, Hanse Haus, Fingerhaus, and Bien-Zenker are still in the running. Their U-values are quite similar, as are the heating systems. Regarding windows, however, they use triple glazing. Is double glazing sufficient?
We are quite unsure about this and would really appreciate some advice.
Thanks and best regards
daugstin
I’m sure this topic has been discussed here quite often. However, I couldn’t find any entries on it right away, so I’m asking my questions quite specifically. We are currently looking around the market regarding house construction.
It seems that there are four builders we could imagine building a house with.
Now the question is whether we want/should build a KfW70 or a KfW55 house.
Which option would you recommend? Also, considering the upcoming Energy Saving Ordinance 2012 – does anyone already know what it will look like?
Are the additional costs worth it in relation to the energy savings?
One builder, Hanlo Häuser, basically builds KfW70 houses and says that is sufficient. According to them, the additional costs are not offset by the energy savings. The walls at Hanlo have a U-value of 0.13, which is quite good. However, the standard is only double-glazed windows. The standard heating system is an air-source heat pump.
Otherwise, Hanse Haus, Fingerhaus, and Bien-Zenker are still in the running. Their U-values are quite similar, as are the heating systems. Regarding windows, however, they use triple glazing. Is double glazing sufficient?
We are quite unsure about this and would really appreciate some advice.
Thanks and best regards
daugstin
parcus schrieb:
@€uro
Well, then install an air source heat pump with its seasonal performance factor in older buildings with inefficient building envelopes and later explain the point when the meter spins. If it is planned correctly, there is absolutely no problem. Then the meter won’t spin either. The seasonal performance factor is not determined solely by the air source heat pump but by the interaction with the entire system!
Best regards.
Well, it might be right for the budget,
the question is, for what purpose.
Of course, you can also sell an unnecessary ventilation system, at least you then save on heat recovery for an inefficient building envelope.
Although, such a nice counterflow layered heat exchanger in the garden of an old villa as a modern plastic...
the question is, for what purpose.
Of course, you can also sell an unnecessary ventilation system, at least you then save on heat recovery for an inefficient building envelope.
Although, such a nice counterflow layered heat exchanger in the garden of an old villa as a modern plastic...