New construction - How to build economically sensibly?

The problem with a calculation are the parameters you assume. Please determine for your house: expected gas consumption (I calculate 8000 kWh for 110 sqm) Determine the annual price from a usual provider, eon or so. Determine the electricity consumption. You can transfer the current one to the new house. Determine the additional cost for the heat pump. Determine one-time costs for the gas connection. Spread them over 15 years. Determine the expected electricity consumption of your new building with the pump; gas then no longer applies. Make yourself one table. It should only cover 15 years. Everything else is nonsense, then the heating, no matter which, is broken anyway. Now calculate. Forecast: a heat pump will only be worthwhile if you assume sharply rising gas prices and moderately rising electricity prices. In my opinion, that is not realistic. Both will rise: gas due to scarcity, electricity due to electric cars. The controlled residential ventilation is, in my opinion, more a comfort extra than one that saves energy. Photovoltaic system on the roof to support the pump: in my opinion, it doesn’t make a difference either, the system is simply too expensive in initial investment. My conclusion: if you have money left, don’t buy building technology, but a nice garden fountain or something like that. You will enjoy that more. One more thing: If you take KfW funds, there must be proof whether you have achieved KfW standards. If you build Energy Saving Regulation basic, you save blower door tests and so on. My opinion: The whole current Energy Saving Regulation is a green-ideological educational concept to promote certain industries under the label of CO2 saving. No one calculates how much CO2 all these things require in production etc. If you really want to save CO2, take the train, walk, buy a petrol car with 75 HP and hybrid, give up on fireplace stove and above all, don’t eat so much meat anymore, then no more rainforest will be cleared for soybean plantations. Karsten

The problem with a calculation is the parameters you assume. Please determine for your house: expected gas consumption (I calculate 8000 kWh for 110 sqm) Determine the annual price from a common provider, eon or similar. Determine the electricity consumption. You can quite well transfer the current consumption to the new house. Determine the additional cost for the heat pump. Determine one-time costs for the gas connection. Spread them over 15 years. Estimate the expected electricity consumption of your new building with the pump, gas will then no longer apply. Make yourself one table. It should only cover 15 years. Everything else is nonsense, then the heating system, no matter which, will be broken anyway. Now calculate. Forecast: a heat pump will only be worthwhile if you assume sharply rising gas prices and moderately rising electricity prices. In my opinion, that is not realistic. Both will rise: gas due to shortage, electricity due to e-cars. The controlled residential ventilation is, in my opinion, more a comfort extra than one that saves energy. A photovoltaic system on the roof to support the pump: in my opinion, that won’t make much difference either, the system is simply too expensive in the initial investment. My conclusion: if you have money left, don’t buy building technology, but a nice garden fountain or something like that. You will enjoy that more. One more thing: If you take kfw funds, there must be proof whether you have achieved kfw standards. If you build to energy-saving ordinance basic, you save yourself blower door tests and so on. My opinion: The whole current energy-saving ordinance is a green ideological educational concept to promote certain industries under the label of CO2 saving. Nobody calculates what all these things need in CO2 for production etc. If you really want to save CO2, take the train, walk, buy a gasoline car with 75 hp and hybrid in addition, do without a fireplace stove and above all, don’t eat so much meat anymore, then no more rainforest will be destroyed for soy plantations. Karsten

My opinion: The entire current Energy Saving Ordinance is a green-ideological education concept to promote certain industries under the label of saving CO2. No one calculates the amount of CO2 needed for the production of all these things, etc. If you really want to save CO2, take the train, walk, buy a 75 HP gasoline car plus a hybrid, give up the wood stove and above all, don’t eat so much meat anymore, then no more rainforest will be cleared for soy plantations. Karsten

Air heat pumps are apparently nonsense in cold regions because they are prone to failure.

We also have one and so do the neighboring houses. It is rather mild here, then there was a hard winter and 4 air heat pumps broke down. 2 have been replaced.

So? Was it the manufacturer, the general contractor, or Frau Holle???

Oh no, it was Merkel.

You ask strange questions that no one can answer.