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?
daytona schrieb:
Our architect and KfW consultant plans, submits applications, and supervises or carries out the inspections. (Everything from a single source)And then tells you that the conditions for gas and solar have been "quietly" changed, very reassuring...
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