ᐅ Allegro-Haus Ltd. Experiences

First of all, thank you very much for your feedback.

We plan to operate the underfloor heating using geothermal energy (borehole). Are there any issues with very low outdoor temperatures? After all, both the ground floor and the upper floor need to be heated this way.
Who has experience with the maximum room temperature that can be controlled?

Where exactly is the problem? We have geothermal heating with underfloor heating, and the screed drying program easily reached 40°C (104°F) without an electric heating element!

But whether geothermal energy is feasible can only be determined by a soil analysis. So first, have a soil analysis done, then choose the type of heating.

Condor schrieb:
..We plan to operate the underfloor heating with geothermal energy (drilling). Are there any issues with very low outdoor temperatures? After all, both the ground floor and the upper floor need to be supplied.

Heat pumps require a supply temperature to the heating surfaces of approximately <= 35°C (95°F) for efficient operation (seasonal performance factor). At the same time, it must be ensured that the produced output can actually be taken up (heating surface sizing, hydraulics). The heating capacity must therefore match the actual demand (DIN 12831).
In addition, the source must be sustainably capable (capacity, extractable energy) of supplying the heat pump permanently and adequately.
If the actual demand (capacity, energy) for heating and domestic hot water preparation is not known, it is likely to be quite difficult to establish an economically viable overall concept. With insufficient or missing precise planning and sizing, one might end up with a money pit. Investment costs, or financing costs, and later operating expenses should be balanced in an economically reasonable ratio.

Condor schrieb:
...Who has experience with how high the room temperature can be controlled to.

The desired room temperatures are contractually agreed upon in Form V of DIN 12831. Depending on this specification, the room heating loads, the sizing of the heating surfaces, pipe hydraulics, the heat generator, and the source design result.

€uro schrieb:
Heat pumps require a supply temperature to the heating surfaces of approximately <= 35°C (95°F) for efficient operation (seasonal performance factor). At the same time, it must be ensured that the generated output can actually be fully utilized.

Underfloor heating is one thing, and water supply for showering, etc., is another. The water temperature produced by the heat pump will not exceed a certain value. Currently, I have district heating, where the supplied water temperature is easily high enough to cause scalding. Does a heat pump achieve a similar temperature (without an electric heating element), or should one expect significantly lower perceived temperatures?

Which heating system is the most economical, aside from gas?

The standard option is an air-to-water heat pump, or should a ground-source (brine-to-water) heat pump with deep drilling be preferred instead?

Are there any experiences regarding the noise levels of both heating systems?

If a building contract is made, how does the financing process work?

I imagine it like this:

• Contract is signed, construction begins.
• After completion of, for example, the foundation slab, the first payment to the house sales company.
• Construction continues, second payment after finishing the next phase, and so on.
• In other words, no payment before the construction phases, correct?

Thanks for the feedback

Condor schrieb:


This is how I imagine it:

• The contract is signed, and construction begins.
• After completing, for example, the foundation slab, the first payment is made to the house sales company.
• Construction continues, with the second payment following the completion of the next construction phase, and so on.
• In other words, no deposit before the construction phases, correct?

Thanks for the feedback

Regarding the financial aspect, Euro will write to you.

But try to find a company that will prepare all plans without getting paid. You will have to make a small percentage deposit to have the planning documents submitted to the building authority / planning office.