ᐅ New Gas Heating System in an Older Building?

1. Not that I know of.

2. Yes

Hello Gibson,

Yes, that is correct. According to the state geothermal law, for existing residential buildings with a floor area of 50 square meters (about 540 square feet) or more, ten percent of the energy demand for heating and hot water must be covered by renewable energy sources (biomass, solar energy, geothermal energy, bio-oil, and biogas) if the heating system is replaced.

In your case, since there is already a heating system installed, I would assume that a replacement is intended. Exceptions to meeting these requirements are only allowed if

• other public-law regulations prevent compliance,
• implementation is technically not feasible,
• the renovation would cause unreasonable hardship for the homeowner (e.g., if they lack sufficient financial resources), or
• renewable energies were already in use before the law came into effect.

However, the rule is that the requirements apply only if the central heating system is replaced. Gas or oil-fired unit heaters are exempt from these provisions. This is a detailed issue that still needs to be considered to determine whether the law applies in your case.

I believe your wood stove can certainly be counted here, but this is also a detail that should be clarified. You should consult an energy advisor, who will prepare the energy performance certificate you need anyway, both for documentation and for possible subsidies. In principle, the combination of your existing stove and a new gas heating system should meet the requirements.

Hello,

Gibson1979 schrieb:
..
2.) Doesn’t the Hark soapstone stove with its 7 kW (9.4 hp) output count as well?

No!

Best regards

1. No
2. Yes --