ᐅ Energy Saving Regulation / Thermal Insulation Certification Offer

Created on: 28 Apr 2020 16:01

Good evening,

I am unfortunately completely inexperienced in this area. We are planning to build our own home in the near future, and now the heating contractor wants the energy saving regulation in order to provide his offer.

My question is, does the energy saving regulation need to be prepared by an energy consultant? As far as I understand, the exact U-value requirements are publicly available. Nevertheless, we asked for an offer with the following costs, which I find quite high.

For energy saving regulation and possibly KfW:

Thermal protection certificate / energy consultation: 1900€
Basic flat rate for detailed energy planning: 2500€
Optional detailed thermal bridge analysis: 2200€ for 20 hours
KfW application processing: 900€
Blower door test: 450€
Spot checks: 720€ per 240€
Energy performance certificate: 250€

Gross total: 7997€

Best regards

Daniel-Sp29 Apr 2020 19:57

The heating engineer should preferably submit their offer only after the heating load calculation has been completed. The heating load calculation should take your desired temperatures into account. Also, consider a room-by-room heating load calculation; the underfloor heating should be designed based on this, with a defined maximum supply temperature as low as possible during the design outdoor temperature (NAT), ideally well below 35°C (95°F) supply temperature at NAT. Designing the heating system based on the energy saving regulation calculation is not reliable.

Tarnari29 Apr 2020 20:03

The question from the OP is: who will do this?

Daniel-Sp29 Apr 2020 20:44

The energy consultant does not offer this service. You can hire the heating installer, who usually has it done by their manufacturer companies. Alternatively, you can arrange it independently, which is also possible online. The important factors are the desired temperature and the specified maximum supply temperature for the correct calculation of the underfloor heating.
If you do some research, you can do it yourself. There is a free Excel sheet available for this. Then you just need to convince the heating installer to implement it accordingly. That’s how I did it after seeing the poor calculation my heating installer received from their underfloor heating supplier. I have not regretted it so far.

Lumpi_LE30 Apr 2020 11:01

#10

Mürker13 schrieb:

The architect has already completed his job and supported us up to the building permit / planning permission application. Nothing more was agreed upon.

And who is handling the access point? That’s why I’m asking, so you don’t end up paying twice.
A word about the house would also be helpful: €4700 for energy-related detailed planning suggests you are building a very special house with projections, supports, a cantilevered upper floor, and an integrated basement garage, which definitely requires careful consideration.

Mürker1330 Apr 2020 17:07

#11

Lumpi_LE schrieb:

And who will handle the access point? That’s why I’m asking, so you don’t end up paying twice.

What is an access point?
The architect did everything for free because he is very good friends with my in-laws.
The house is a square, 181sqm (1,948 sq ft) building with a garage. No balcony, no projections, no underground garage or basement. It measures 12m x 11m (39 ft x 36 ft) with an attached garage featuring a slightly sloped shed roof.

Daniel-Sp schrieb:

Ideally well below 35°C (95°F) VLT with NAT.

What does NAT mean? But you don’t necessarily need an energy saving regulation certificate if it’s a new build? The heating engineer wanted to base the heating load calculation on the energy saving regulation, as far as I understand.

Daniel-Sp30 Apr 2020 19:52

#12

NAT is the standard outdoor temperature (related to the construction site)

ᐅ Energy Saving Regulation / Thermal Insulation Certification Offer

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