ᐅ Decision on Heating System (Including Breakdown of Investment Costs)

Hello everyone,

I am planning a new detached single-family house and would appreciate your advice. Based on the following data and costs, which heating system would you choose?

Property information
- Detached single-family house; outskirts of Leipzig
- 10.39m x 11.15m; no basement, ground floor + first floor + finished attic, 213 sqm (including attic)
- No obstacles facing southwest orientation
- Only one neighbor in the entire street has an air source heat pump
- Gas is available at the property

The following heating system options are available:

Option 1:
- Air source heat pump Vaillant VWF 88/4 with aroCollect
- Exterior wall construction with 36.5 cm (14.4 inches) Poroton brick, brand Eder XP9
- Costs (before deducting any subsidies) = 29,162 EUR

Option 2:
- Ground source heat pump Vaillant VWF 88/4
- Exterior wall construction with 36.5 cm (14.4 inches) Poroton brick, brand Eder XP9
- Costs (before deducting any subsidies) = 35,401 EUR
- Possibly additional surcharge for soil class 6-7 solid rock per linear meter at 13.45 EUR and piping for unstable soils per linear meter (from 10 m) at 13.45 EUR

Option 3:
- Gas condensing boiler Vaillant VC146/5-5 including VRC700/5, solar system with 4 solar collectors VK145 for heating support
- Exterior wall construction with 42.5 cm (16.7 inches) Poroton brick, brand Eder XP9
- Costs for gas connection still uncertain
- Costs for gas + solar = 29,067 EUR + extra charge for thicker masonry = 4,926 EUR; total = 33,993 EUR

If we receive subsidies:
Air source heat pump = 27,662 EUR; Ground source heat pump = 30,901 EUR; Gas = 33,993 EUR

Without subsidies:
Air source heat pump = 29,162 EUR; Ground source heat pump = 35,401 EUR; Gas = 33,993 EUR

Thank you very much
Dirk

Ground loop. You don’t see it, it makes no noise, and it is more efficient. Especially since incentives for air-to-water heat pumps can sometimes be denied.

By the way, the incentive is €5000 (about $5400) for ground loop systems due to the load management bonus / smart grid label (+€500, about $540).

Regarding the prices including subsidies... definitely geothermal heat pumps. No ugly air-to-water heat pump standing around somewhere, very efficient, the drilling is "for eternity" and will outlast you by many years.
And compared to gas: the roof stays free for the much more sensible photovoltaic panels. Solar thermal collectors can be thrown in the trash... they do produce hot water endlessly, but usually when no one needs it (unless you have a huge pool). 😉

How do you get to 29k for gas/solar thermal? That seems very expensive to me.

Congratulations on securing a plot in Markkleeberg.
I would also consider the geothermal option, since 3,000 (currency) is quite low.
However, gas is extremely expensive... if it’s available in the street, it can be much cheaper. I would get additional quotes.
I find all the offers quite expensive. Does the price at least include the complete underfloor heating system, or is that still extra?

The mentioned costs also include underfloor heating, multilayer composite pipes, insulation, and the complete installation.

Sorry, I forgot to mention this information. Does it still seem too expensive?