Why don't construction prices go down?

2023-12-02 10:29:23

Converted approx. 14 cbm/week x COP 3.5 (roughly estimated) equals 49 cbm with a gas heating system. For comparison: Our house was built in 1978, new glazing, the large gable wall newly insulated, attic rafter insulation new, 125 sqm living space. Plus basement at the same outside temperature, but the rooms at 20-22 °C, weekly consumption 25 cbm gas. Saving measure in my opinion: lower room temperatures, I consider the consumption normal at these temperatures in the house. Or am I calculating wrong?

2023-12-02 11:25:02

What does energy consumption have to do with the construction prices not going down?

2023-12-02 12:31:13

what is your storage actually doing? How many cycles did it complete in November?

2023-12-02 13:42:19

what’s your storage actually doing? How many cycles did it do in November?

Significantly fewer. But our November was also extreme. Our builder wanted to be done with plastering by the end of October at the latest. It still isn’t plastered because it rained for 6 weeks straight, no joke. And then the frost came. In September we had 28.2 cycles, in October 16.2, in November felt like 2-3 maximum. I need to update my Excel, then I can tell you exactly. I think in the 3 winter months we'll use most of it directly, unless it gets sunnier and warmer now.

2023-12-03 09:23:00

The thermostat is crap. Please measure RT (there are very cheap thermometers, just spread a few around the house). If 25-26°C are correct (which can certainly be the case with a flow temperature of 31.5°C), then you have to be aware that this is about 4-6°C warmer than "normal." The DIN specifies 20°C for living rooms and 24°C for bathrooms. It is often common in modern new buildings to aim for 21-22°C, but 25°C is really quite cozy and usually more typical for houses with fireplaces. The heating curve at 0.5 is also way too high for a new building. I have a KfW-70 house and run at a heating curve of 0.15. However, I then also do not achieve my set WT (but I control differently). Try at least lowering the WT to 23°C and the heating curve at least to 0.2. Then wait two days. If it gets too cold somewhere, you either have to raise the WT again or set a steeper curve. There are different philosophies on that. Google "hydraulic and thermal balancing"...

RT is between 23.5 and 25.6 degrees So nice and warm. But okay, I will observe it and possibly fiddle with the room temperature and the heating curve. My neighbors have consumption in the same range.

2023-12-03 10:29:27

You don’t need to adjust for room temperature. Either you want it that warm, then it is like that and just costs energy... or you want to reach approximately the values calculated for you as consumption kWh/m²/a, then you have to significantly lower the RT.

Heating curve is all well and good, but in the end it’s not a perpetual motion machine either. If you want 25°C in the room, it doesn’t really matter whether you have 35 or 32°C in the flow. At the lower temperature the controller just has to push more water through. That might be 5% more efficient…

But talking about efficiency at 25°C RT is like tuning your Porsche Cayenne with 400 HP for Eco with a chip so that it consumes less...

Similar topics
25.11.2017	Underfloor heating is not getting warm - 20,000 kWh consumption	11
15.09.2020	Which heating system is suitable for a room temperature of 23 °C?	22
04.01.2022	Air-water heat pump current consumption and data	1439
15.12.2022	Electricity consumption at home, what is your consumption?	418
20.01.2021	Air-to-water heat pump consumption at 30 kWh per day	52
10.01.2022	Determine the consumption of air-to-water heat pump from the total electricity consumption	45

Why don't construction prices go down?

Buschreiter

markusla

RotorMotor

kati1337

hauskauf1987

xMisterDx