Build a gas heater today?

For our new building, we originally wanted to have an air heat pump and generate the electricity for this and also part of the other electricity using our own photovoltaic system and electricity storage. After receiving 2 cost estimates, we now have doubts. The lowest estimate for a heat pump with 5.08 KW, photovoltaic system with 5.1 kWp and storage with 5.12 kWh is €33,000. Should we rather take a conventional gas heating system? That would definitely be cheaper. Or is that absolutely no longer up-to-date?

Individual awarding?

Otherwise, outsource the contract for the photovoltaic system (without storage, as it will not be cost-effective) and fully cover the roof to achieve a low price per kWp.

Hi, in the forum for photovoltaics the combination of photovoltaics + heat pump is often discussed. Storage is almost generally advised against because the (energy) storage is the underfloor heating or the storage of the heat pump. Also, such a small system is almost useless with a heat pump (winter / summer problem). Probably better: roof fully covered with photovoltaics, battery storage only if very cheap because subsidized or with the understanding that storage is an expensive hobby but ecologically probably good (self-sufficiency, less electricity from fossil fuels, etc.) However, this is borderline (eco aspect).

The EP would also be good to at least roughly assess the offer: What does the heat pump cost (and what exactly is included in the offer), how expensive is the photovoltaics and what does the storage cost? (Also here: have the photovoltaics offer checked)

A gas heating system can still make sense today. However, for this you need an exhaust pipe and the gas connection. Ask about the heat pump and [Photovoltaik] separately and, in the worst case, assign them separately.

You can only decide that for yourself. Calculate what you pay for the gas heating including connection and compare it with what you pay for the heat pump. Don’t forget the 35% subsidy for the heat pump. Then calculate the ongoing costs; here it depends on how the prices for electricity and gas develop. But no one can predict that for you. More important than the heat generator, in my opinion, is the most efficient design of the heating system possible.

Hi,
why should a gas heating system no longer be considered up-to-date? In terms of pollutants, they burn extremely clean, and the CO2 emissions are not really significant compared to the emissions caused during construction. If you’re building with a basement, just assume that the concrete used in the house alone has caused more CO2 than the heating system will emit over the next 15 years.
If CO2 is important to you, reduce your air travel. One round trip from Frankfurt to Hong Kong by one person corresponds to 5 years (!!!!!!) of heating with gas in our house!

In terms of operating costs, gas heating systems usually also come out better. With a gas price of 5 cents compared to 26-28 cents for electricity, a heat pump must achieve a coefficient of performance well over 5.5 in order to be better. Only brine heat pumps manage that.
The purchase price of the gas heating system is definitely significantly cheaper, but as Rick already wrote, you have to consider the exhaust pipe and connection in the calculation.
In addition, gas heating is silent, no loud, annoying fan unit outside, and when I look around at my neighbors, heat pumps still seem to be significantly more prone to faults and require more maintenance than gas heating systems.

If you install your gas heating system, I would always make sure that the heating loops in the screed are laid close enough so that you can possibly switch to a heat pump in 10-20 years.

Best regards,

Andreas