ᐅ House Photos Discussion Corner – Share Your Home Pictures!

tumaa schrieb:

For the geothermal heat pump = 2x100m (2x80m would have been sufficient, but I wanted a buffer )

Did the permitting authority approve the 100m without any hesitation? For anything over 95m (310 feet), they already suspect mining law issues here and look very, very closely.

Installation spacing based on heat demand is generally not wrong. If it has actually been calculated, then it’s fine.
As I said, it’s hard for me to estimate; on the foil, there are these markings. Either they indicate a 5cm (2 inch) spacing or 10cm (4 inch). If it’s 10cm (4 inch), then you would have 20cm (8 inch) spacing in the main room. That would be quite wide, but with good insulation and depending on other conditions, it might be sufficient—especially since the flow temperature has been set to 35°C (95°F).
The catch is that heat pumps are more efficient the lower the flow temperature is. You can adjust this setting. However, if you have installed pipes too far apart, your room might not stay warm enough during cold outdoor temperatures in the worst case.
The critical rooms are usually the bathrooms, since they have limited floor area available.
Therefore, you will likely have to operate with at least 35°C (95°F) flow temperature, otherwise it won’t get warm enough. This comes at the expense of higher energy consumption.

A heating buffer means the heat pump doesn’t heat the heating circuit directly but first heats a storage tank, the buffer, which then supplies the underfloor heating. This results in maintaining higher temperatures.
However, this also reduces efficiency.

MayrCh schrieb:

The authority approved the 100m (328 feet) without batting an eye? For anything over 95m (312 feet), they already suspect mining laws here and inspect very, very closely.

Oops, I meant under 95m (312 feet)

We have additionally installed a wall heater in the bathroom to increase the heated area.

face26 schrieb:

Spacing based on heat demand doesn’t sound wrong in principle. If it was actually calculated, then it’s fine.
As I said, it’s hard for me to estimate; there are these markings on the film. Either it’s 5cm (2 inches) or 10cm (4 inches) spacing. If it’s 10cm (4 inches), you’d have 20cm (8 inches) spacing in the open living area. That would be quite a lot, but with good insulation and depending on other conditions, it might be sufficient. Especially since the supply temperature is designed for 35°C (95°F).
The catch is that heat pumps are more efficient the lower the supply temperature is. You can adjust that. But if you have installed pipe spacing that is too wide, your room may not stay warm enough at low outside temperatures in the worst case.
The critical rooms are usually the bathrooms, since there is little floor area available.
So you’ll likely need to run with at least 35°C (95°F) supply temperature or it won’t get warm enough. This will increase energy consumption.

A heating buffer means that the heat pump does not heat the heating circuit directly but first charges a storage tank (the buffer), and from there the underfloor heating is supplied. But this means higher temperatures are maintained.
It’s also an efficiency killer.

Ah, I understand, thank you.
So in the PDF from Pedotherm it clearly states that the engineering is part of their scope of services. Meaning it’s not an off-the-shelf system but individually and precisely configured for each building project, including heat load calculations. I rely a bit on the company doing their job because I can’t do it any other way. As a layperson, I wouldn’t dare to interfere in such a topic. We chose a general contractor from our area who has a very good reputation, also among people we know. They aren’t the cheapest, but I assume they will also hire a company that really knows their trade for the underfloor heating.

Climbee schrieb:

We added an electric wall heating system in the bathroom to increase the heated surface area.

Yes, we had that done too.

kati1337 schrieb:

The PDF from Pedotherm clearly states that engineering is part of their scope of services. That means it’s not an off-the-shelf system but is individually and precisely configured for each construction project, including heat load calculation. So, I’m relying somewhat on the company to do their job, since I can’t really do it differently.

Yes, it sounds a bit like “sales talk,” and the few details raised some concerns.
The system is already installed anyway, so there isn’t much you can change now.

If the energy consumption turns out to be acceptable, then that’s fine. If not, you will have to dive into the subject matter a bit, and there might still be ways to optimize.
The first winter will show.