Which heating? Gas or electric heating?

Hello everyone,
I have a question about a heating system renovation. I am new here and hope that I am in the right place with my concern.

We are currently planning to modernize our heating system. Our house was built in 1995, conventional construction, Poroton bricks, underfloor heating, approx. 220m2.
We are currently heating with oil (consumption approx. 4000l/year), no condensing boiler.

We are currently refinancing and would like to get rid of the oil heating system in the process, to get rid of the oil tanks, and later convert the gained space into living space.

As options, gas or geothermal heat pump have emerged. Heat pumps are not an option because we do not want to install an outdoor unit. Gas could be installed for under 2000 euros, the investment is manageable, but here too you would again be dependent on a fossil fuel. According to our offers, the conversion would cost us about 16,000 euros.

Geothermal would be possible for us. The neighbor has a borehole of approx. 100 meters. I do not know the details. According to our offers, we expect costs around 35,000 euros. The drilling company offered us a borehole 3x45m, 3x15 kW.

Now I have no idea how to classify the borehole and whether it is sufficient. It irritates me that the neighbor only has the one borehole, which goes significantly deeper.

Basically, we are also not sure whether the significantly higher investment sum will ever pay off (apart from the dependence on gas). Our neighbor uses 50-60 euros of electricity per month for his heat pump – but he has a low-energy house with a ventilation system. We have basically excluded subsidies for now. Hessen offers discounted heat pump electricity tariffs.

Maybe someone can give us an assessment that can help us with the decision-making. We would be very pleased.

Best regards

Christian Kumpf

Not a second thought, of course gas because it is much cheaper and solid technology

Exactly, definitely gas. Heat pumps are a high risk in old buildings. Especially with your consumption.

Planning, heating surfaces, and the house must fit the heat pump, otherwise you will have enormous electricity costs. And for the planning, you absolutely cannot rely on the craftsmen/sellers.

Alternatively, you prepare your house beforehand and educate yourself about heat pumps, since the heating is still running. But that is a longer process, costs money, and probably isn't sensible given the year the house was built.

Gas. Ask whether gas suppliers subsidize conversions. Ours, for example, pays for oil tank disposal when switching to gas.

Gas. Ask if gas suppliers subsidize conversions. Ours, for example, pays for oil tank disposal when switching to gas.

Thanks Nordlys - The connection for under 2000 euros is already the subsidy - it is about 14 meters to our basement - without an offer they would charge 3-4000 euros for that.

Not a second thought, of course gas because it is much cheaper and solid technology

There's always the fear of investing in the wrong technology - the gut feeling and the reason that with gas we have a decent price and proven technology ....