Hello everyone,
a few months ago, we had an initial meeting with a construction manager/developer. Together, we discussed a KfW70 standard house (for funding reasons) with a gas boiler and solar thermal system. It was said to be no problem.
Yesterday, the statement came from the responsible architect, who is also officially listed as a KfW consultant (see KfW website), that her program/calculator shows our desired KfW70 house would only be achievable with a heat pump. If we still want a gas boiler with solar thermal, we would need to make some "adjustments" to the windows (something to do with noble gas filling).
I always thought a KfW70 house consumes only 70% of the energy of a reference house, which, in my understanding, is reflected in the insulation. Are the heating systems also compared in their specific energy consumption?
a few months ago, we had an initial meeting with a construction manager/developer. Together, we discussed a KfW70 standard house (for funding reasons) with a gas boiler and solar thermal system. It was said to be no problem.
Yesterday, the statement came from the responsible architect, who is also officially listed as a KfW consultant (see KfW website), that her program/calculator shows our desired KfW70 house would only be achievable with a heat pump. If we still want a gas boiler with solar thermal, we would need to make some "adjustments" to the windows (something to do with noble gas filling).
I always thought a KfW70 house consumes only 70% of the energy of a reference house, which, in my understanding, is reflected in the insulation. Are the heating systems also compared in their specific energy consumption?
@oleda222:
Big thanks for the useful hint 😉
I will check this again, since the architect works freelance for the developer. I have no idea if the wording is legally accurate:
“The expert must be commissioned for the construction project with economic independence. Besides consulting, planning, and construction supervision for the project, the expert must not have any ownership, partnership, or employment relationship with the construction companies or suppliers, nor act as an intermediary for deliveries or services.”
Big thanks for the useful hint 😉
I will check this again, since the architect works freelance for the developer. I have no idea if the wording is legally accurate:
“The expert must be commissioned for the construction project with economic independence. Besides consulting, planning, and construction supervision for the project, the expert must not have any ownership, partnership, or employment relationship with the construction companies or suppliers, nor act as an intermediary for deliveries or services.”
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