Gas heating without solar thermal?

Ok - in our case, however, it seems that the site plan does not have to be created by a surveyor or is already available.

Take a look here:

§ 3 BauPrüfVO

Site plan

[...]

(3) The site plan (paragraph 1) and the calculations according to paragraph 2 must be prepared by a cadastral office or by a publicly appointed surveyor and certified with public faith (official site plan), if

1. the boundaries of the building plot are not established boundaries within the meaning of § 19 paragraph 1 VermKatG,

2. the boundaries of the building plot and the existing structures on the building plot and the adjacent plots are surveyed in such a way that coordinates for the boundary points cannot be determined in a uniform system, or

3. there are boundary encroachments on the building plot or from adjacent plots,

4. there is a construction encumbrance within the meaning of § 18 on the building plot or on the adjacent plots.

If special property conditions exist, in particular due to the unclear course of the boundaries of the building plot caused by boundary projections or boundary bends, and the requirements for the preparation of an official site plan according to sentence 1 do not apply, the site plan according to paragraph 1 and the calculations according to paragraph 2 can also be prepared by a surveyor who is a member of an engineering chamber; membership in an engineering chamber must be proven at the request of the building supervisory authority. In all other cases, these building documents can also be prepared by the designer.

Are you sure your construction engineer is allowed to prepare the preliminary site plan?

Rhenish greetings

Then all that remains is to hope that the site plan is in the correct scale and not too old yet.

Edit: and see Bauexperte's post

The problem is usually that the architect is allowed to create the site plan but does not dare to do it. It was the same in our building area. Almost all architects pushed a surveyor on the builders (who then of course wanted to be paid and also took their time), especially the prefabricated house manufacturers. One then wonders why one (the architect) studies for so long if one cannot even create the site plan – even though all necessary information is available.

So the site plan is made by the civil engineer; we studied the passages cited by Bauexperte two weeks ago and he concluded that these are established boundaries with clear boundary points, or generally speaking that the conditions are met that the site plan does not necessarily have to be created by a surveyor. Since he has already created several site plans himself and (successfully) submitted them, I think he knows what he is doing. We also know that it is handled differently from district to district.

Yes. But free yourself from the idea of being able to submit the building application this year; that will never, ever work

The KfW accepts the proof inform - front - of form 153 and, after completion of the construction measure, the confirmation that KfW 70 has actually been achieved.

I would like to revisit the topic because the submission of the building application actually still worked in the old year.

I wanted to make sure that I understand the following correctly:
- Waiving solar thermal is possible with a simultaneous undershoot of the Energy Saving Ordinance minimum requirements by 15%
- this is equivalent to a KfW 70 certification being necessary, meaning that you actually have to undershoot by 30%, since there is no standard "KfW 85" - correct?

I am currently trying to compare the prices for just meeting the Energy Saving Ordinance minimum requirements + solar thermal with those for undershooting the Energy Saving Ordinance minimum requirements without solar thermal. The latter saves the costs of solar thermal but means additional costs for ETICS and certification, as far as I can see. I have prices for solar thermal and KfW 70 certification, but I am still missing them for ETICS.

Thanks and regards

Hello sirhc,

The Energy Saving Ordinance and KfW are two completely different things. The Energy Saving Ordinance certificate is important for the building permit, the KfW certificate for the subsidized financing through the KfW bank.

To comply with the Energy Ordinance, either renewable energies must be used (solar thermal for > 15% of the heating energy or biomass for > 50% or heat pumps for > 50%) or the two indicators annual primary energy demand and transmission heat loss must be at most 85% of the Energy Saving Ordinance limit value.

For KfW-70, the annual primary energy demand must be at most 70% of the Energy Saving Ordinance requirement, the transmission heat loss at most 85%.

For KfW-55, the annual primary energy demand must be at most 55% of the Energy Saving Ordinance requirement, the transmission heat loss at most 70%.

For KfW-40, the annual primary energy demand must be at most 40% of the Energy Saving Ordinance requirement, the transmission heat loss at most 55%.

These are all specifications according to the Energy Saving Ordinance 2009, which still apply to you.

I would be interested to know what your price comparison showed. I would strongly guess that without solar thermal it is so much cheaper that the low consumption costs with a solar thermal solution are not sufficient to amortize the additional costs of solar thermal in the first 20 years.

But well, the Energy Saving Ordinance 2009 is now history. I am not familiar with the new regulations, I assume that now with a gas heating system it no longer works without solar thermal.

Best regards

jx7