House construction, KFW70, approx. 150m², which heating? Gas/air-water heat pump?

Hello,

If you go by that, you would have to build a passive house. Electricity is not exactly ecological either, and the production of heating systems is certainly not ecological at all... But sure, topics like fracking etc. are not so great and speak against gas.

I completely agree with you; what really annoys me is the one-sided perspective! Similar to choosing stones, there is no silver bullet in the area of heat generators either. I hold the position that both sides of the coin must be considered; that is the sole reason I am expressing myself on this topic.

But economically speaking, the acquisition costs for gas (or partly still for an air heat pump) are the cheapest. And even if, for example, you have 300 euros more heating costs per year, that is still "only" 6,000 euros extra over 20 years. And I would say, for example, that a ground source heat pump with trench collectors easily costs over 6,000 more than a gas boiler.

I am, for example, firmly convinced that in the medium term we will all heat with electricity (have to); the exciting question is how this electricity is produced

Rhine greetings

Our considerations: For €29,000 we can heat for a long time and pay the chimney sweep €45 once a year.

At that price, we would have also turned it down. I still remember: In the initial meeting we said that we would like geothermal energy. But since this, according to internet research, costs about €25,000, we would rather go for gas + solar. Our consultant (head of the company) said: How do you come up with that number? You can assume that the heating system will cost all in 13 - 14 thousand euros (including drilling but of course not yet including the installation of underfloor heating). In the end, it was €1,700 more because the drilling was somewhat deeper and therefore more expensive. Otherwise, it fit.

Our consultant (head of the company) said: How do you come up with that number? You can assume that the heating will cost around 13 - 14 thousand euros all in (including drilling but of course not yet laying the underfloor heating). In the end, it was 1,700 euros more because the drilling was a bit deeper and thus more expensive. But otherwise, it was accurate.

This is also the usual price for installing a geothermal heat pump; it only gets "more expensive" if the ground requires more complex drilling measures. The device itself is not significantly more expensive than a gas condensing boiler or an air-water heat pump; only the drilling risk increases the actual costs.

Best regards from the Rhineland

A central system properly planned and installed can also be obtained for less than 10 TSD... just award the contract yourself...

Is it really that simple? Doesn’t that only cause problems if I have a single overall contractor for the house and then start inserting a trade myself in between?

Yes, it’s that simple... however, you have to clarify that with your provider BEFORE signing the contract...

He is also just a salesperson and wants to sell you something... so you hold the upper hand before you sign...