Energy "concept" for old farmhouse

I think it's about the fact that with poor insulation, a heat pump is not possible/worthwhile.

One must at least not expect the efficiency as in new construction.

may be able to answer some of your questions

Also renovating a half-timbered house.

My knowledge is only based on what I saw during the demolition. Be very careful which materials you use. Problems occurred where new materials simply met old ones.

@ boxandroof : I wrote something about the relationship between Gebäudedämmung and the Heizungssystem.

The selection of the heat generator and the corresponding heat transfer system is secondary to other planning decisions at the start of the project. A floor heating system or even a wall heating system is a low-temperature heating system that only really works from a minimum insulation standard of the building onwards, otherwise the necessary amount of heat (... heating load calculation !) cannot be provided. In addition, in renovation projects of existing buildings there are often structural constraints such as low room heights, unsuitable substrates, etc., which complicate or make it impossible to install underfloor heating.

The renovation planning of such a construction project in a historical context is a very complex matter that most builders underestimate at the beginning. In my construction consultations, I occasionally see such projects that have been started without a coherent renovation concept in self-management and have thus become stuck. Sometimes previously completed construction work has to be dismantled again and planning must start at an earlier point. This should be avoided. It costs time and above all: money.

Thank you very much for the extensive tips (hab nun viel zum lesen). As recommended, we will now first seek professional advice. Wishing everyone a relaxing weekend.

yes, we are also renovating a half-timbered house, but unfortunately we cannot compete in terms of scale: we have no energy concept. The man by my side is indeed an energy saver of the highest order and, as I have come to realize time and again in our thirty-year relationship, a brilliant engineer and tinkerer, but for our special case, a listed house in an urban location (no forest, just a gas station next to the house, not even 2000 sqm of land, no wind turbine possible) he has no convincing solution either. However, I just mentioned it to him and he got bright-eyed at your project: some solar thermal with storage in the barn (or even a storage pond?), this strange ice heating system, if you need cooling in the summer? The well seemed promising to him, if you still have a deep well where the cooled "heating" well water can be disposed of. His advice: find an energy consultant who can also think outside the box, your heating will never be a money saver, but perhaps one you can live with ecologically, socially, and financially.