Heating system new construction (heat pump + stove + solar)

Oil doesn't need a basement. A modern new building doesn't need more than 2000-2500 liters of supply.

Morning.

So, I don’t want to overstep, but OIL tanks are allowed in the garage, for example. As long as it is ensured that the OIL cannot leak into the soil in case of a leak, for example by masonry and sealing. I don’t know if double-walled tanks are already sufficient there. But maybe everything is different in Bavaria than here :)

I didn’t say that liquid gas has no place in new buildings, only that I would never use it. The costs are too high. Above all, there are few dealers, so you buy liquid gas correspondingly expensively.

I also don’t like heat pumps, but our state regulates it so that in the long term there are no alternatives. Even if the electricity for the heat pump is first generated in a gas power plant and then arrives in the houses with losses.
Our neighbor has a heat pump, consumed 14,000 kW for 140 sqm living space, and achieved KFW 30. I have gas, consume 8,000 kW (on average) with 180 sqm and 3 m high ceilings, and have only just reached Kfw 70 (without solar). But the neighbor is doing it for the future of his children and drives an SUV (German diesel) to go shopping. Sorry, but...
But now this has nothing to do with the topic.

He meant me. I think that has no place in new buildings. I find the overall costs too high. Oil is more or less outdated and technically not quite up to par compared to what is available. It takes up storage space, often stinks, and you pay for tanks. Additionally, there are insurances and possibly regular inspections (TÜV). With liquefied gas it's similar, only that the heaters there can modulate acceptably. The price is about the same as heating oil. Either you buy a tank or rent one and become dependent on the company that rents it out. Unfortunately (and I really have to admit that good alternatives are often lacking) the general contractor adds hefty prices if you choose a heat pump. In addition, really good planning is needed for the effective operation of a heat pump. But that eliminates the chimney, the related chimney sweep, the maintenance is simpler, and you can sensibly support it with photovoltaics.

Ok, I completely agree with you about oil. That is really no longer quite up-to-date, especially because of the smell and space requirements.

Chimneys are now completely omitted with gas as well, it goes outside through a plastic pipe (costs max. 100€). The gas tank installation costs 4,000€, so it is correct that the initial investment exceeds that of the heat pump. However, the latter is more expensive than the gas heating system, but I don't have the exact difference for you.

Effectively, the price advantage for the heat pump should be somewhere around 1,000 - 1,500 €, if you build with a general contractor, the difference is probably rather on the side of the gas heating system.

And the most important point for us was reliability. Gas heating is a proven technology, heat pumps have been installed on a large scale for a maximum of a decade. They are definitely more prone to defects, and in operating costs at best ahead in the manufacturers’ bills. The real consumption values are actually significantly higher.

We heated our house last year with 560€ of liquid gas (129m2, 4 people) and produced hot water.

Let’s assume that the kWh costs only 22 cents, then I get 2,545 kWh for that. The heat pump can't manage that, can it, or can anyone provide concrete figures here?

So I seriously doubt the plastic pipe and 100€ now. However, that is often included anyway. If that is sufficient, the costs for the chimney are also omitted.
The chimney sweep still comes every 2-3 years. Plus the regular inspection of the tank. Admittedly every 10 years.

By the way, heat pumps are also a proven technology. Just not nearly as widespread. And high maintenance costs only occur if it is poorly planned. Which unfortunately often happens.
In return, the annual maintenance of the heat pump for about 150€ is omitted.
The condensing boilers (whether oil or gas) are unfortunately quite sensitive. But they forgive planning errors.

I get electricity at 21.5 cents/kWh. But let’s go with your 22 then.
Your calculation is correct so far.
However, with proper planning, the heat pump converts that into 4 (air heat pump) or 5 (brine heat pump) times as much.
So 12,000 kWh of heat come out.

But, and I admitted that right at the beginning, the general contractors like to stuff their pockets because of the subsidies on the heat pump.
Therefore, it often has to be foregone.

So we have gas in the current house. The chimney sweep must come every three years.
In the other house, we have a brine heat pump, of course no chimney sweep.
My parents got oil three years ago and chimney sweep.

All in all, all systems were almost equally expensive, plus or minus 1000 euros. With gas, the connection was added, so it was equally expensive.

In terms of maintenance, I have to say oil is the cheapest. Although the craftsman charges the most there.

We also had gas with a tank, but that has been the most expensive heating so far. All houses consumed around 8000 - 10000 kW. So I can compare it relatively well.

What I have against heat pumps is that our electricity will soon no longer be affordable. Photovoltaic panels on the roof are also pointless with a heat pump, as the sun does not shine when I need heat.

So in short, you have to manage to consume little, then the environment is helped, the wallet, and the state also does not get its hands on the excessive eco taxes. But somehow the state has to finance all its civil servants for new eco laws. But that is just my opinion.