ᐅ Which heating method would you choose and why?

@ parcus: What is a DV heat pump?

@hephta

Direct expansion heat pump
has no third circuit, so the pump is not needed
and works efficiently with relatively small collector areas starting from a 1:1 ratio.

Regards

Tobinger schrieb:
Hello,
I plan to build soon and can’t decide between gas and geothermal heating. The single-family house with KfW 70 standard (basement, ground floor, one upper floor, and converted attic) has 163 sqm (1750 sq ft) of living space and is occupied by two people. Underfloor heating is also planned. What is the most cost-effective way to heat both hot water and the house? What is the best option and why?

Good luck

Heating with geothermal energy basically means relying on electricity for about 30% of the heating. Considering the higher initial investment costs, I would tend to choose gas or, for a single-family home with enough space, wood pellets.

Natural gas is currently the most expensive energy source, followed by oil and wood pellets.

All of these energy carriers will increasingly differ in cost from electricity over time, especially as the share of renewable energy rises.

It may be true that electricity prices could double again in 10 years, but the other energy sources are likely to increase even more. So the gap will continue to widen. Just yesterday, BMW, as a leading fuel cell developer, canceled its project.

Why else would nearly only passive houses be built from around 2020 onward...

Best regards

parcus schrieb:
Natural gas is currently the most expensive form, followed by oil and pellets.

All of these energy sources will increasingly differ in price from electricity over time, especially as the share of renewable energy grows.

For oil, I would find the space too valuable, so I would prefer pellets instead, even though their price will likely depend on the cost of alternatives (with discounts as long as the investment costs are higher). The day will definitely come when electricity will be cheaper, but certainly not within the next 10 years. After all, wind, solar, and biogas electricity also need to be distributed and buffered unless you can use them yourself close to the time and place of generation.

Fuel cells are ultimately just batteries for hydrogen produced by electrolysis or from natural gas.

Pellets, although their price will certainly also depend on the cost of alternatives

Pellets are less influenced by alternatives, as the price development since 2006 has shown. During that time, other alternative energy sources remained almost stable, but pellet prices rose above the price of oil for the first time. This year showed a similar trend.

Demand plays a major role here, not only as a heating fuel but also as a raw material for production.

I mention fuel cells in terms of future developments, meaning cars will continue to be powered by oil and gas.

Of course, electricity will not become a cheap commodity...

Therefore, the heating load of buildings becomes increasingly important. The long-term goal is certainly the net-zero energy house.

Best regards