ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Bookstar schrieb:

What temperatures are you getting? Right now, my flow temperature is 29.5°C (85°F) and the return temperature target is 25.4°C (78°F). The outside temperature is 8°C (46°F). This results in about 22.5°C (72°F) inside the house.

For heating the screed today, I have similar values (30/24°C; 86/75°F). But currently, there is no insulation on the house or basement ceiling, and some single-pane windows are still installed, plus the roller shutter boxes are open. Inside the house, it’s just over 20°C (68°F).
Something seems off with your house if the heat is just dissipating like that. The outside temperature here is currently 11°C (52°F).

Yes, the energy is definitely going somewhere in large amounts.
Behavior of the occupants?
Monolithic construction with thermal bridges?

Accepted as monolithic under KFW55 standard. No idea, basement insulated, including beneath the floor slab. We ventilate normally, often opening windows, but I don't think it’s unusually frequent. I don’t believe there are any thermal bridges.

But honestly, who wouldn’t heat a house with consistent outdoor temperatures of 7 to 12°C (45 to 54°F)? How else would you have a warm home? The heat has to come from somewhere.

nordanney schrieb:

I had similar values for underfloor heating today (30/24). But there is still no insulation on the house or basement ceiling, and some single-pane windows are installed with roller shutter boxes open. Also, the indoor temperature is just above 20°C (68°F).
Something must be wrong with your house if the heat is just dissipating like that. Outdoor temperature here is about 11°C (52°F).

If there is no insulation yet, that doesn’t help me.

Bookstar schrieb:

Monolithic construction certified as KFW55 standard. No basement, insulated including under the slab. We ventilate normally, often opening windows, but I don’t think unusually often. I believe there are no thermal bridges.

But honestly, who wouldn’t heat when outdoor temperatures are constantly around 7 to 12 degrees Celsius (45 to 54 degrees Fahrenheit)? How else would you have a warm house? The heat has to come from somewhere.

It’s logical. Without heating or adequate indoor temperatures, warmth can only come from the sun through windows or from the oven.

We only have 22 degrees Celsius (72 degrees Fahrenheit) or more during the day when the sun is shining. Otherwise, the temperature usually stays around 20 to 21 degrees Celsius (68 to 70 degrees Fahrenheit) (currently 20.5°C (69°F) on the ground floor), but that warmth only comes from solar gain and has to carry through the night. External blinds are always raised, and the patio door/windows are kept closed or immediately shut after opening.

What do you think is how passive houses work? Nobody there maintains 23 to 24 degrees Celsius (73 to 75 degrees Fahrenheit) in the bathroom and 22.5 degrees Celsius (72.5 degrees Fahrenheit) in other rooms in the evening without the sun shining during the day.

You can’t expect excessively warm indoor temperatures and then complain about the heating. Anyone who has their heating off now won’t have your indoor temperature.

Otherwise, here is the forecast. It will improve. For June, in my opinion, it’s unacceptable, but we’ve all been spoiled by the last five years. Though it’s only a trend for the south, this year it was unfortunately way too accurate.

Bookstar schrieb:

Certified monolithic as KFW55. No idea, basement insulated, including under the slab. We ventilate normally, often open windows, but I don’t think unusually often. I don’t think there are any thermal bridges.

But honestly, who wouldn’t heat with an average outdoor temperature of 7 to 12°C (45 to 54°F)? How else can you have a warm house? The heat has to come from somewhere.

Do you have a ventilation system?

If no explanation is found by next winter, it might be worth taking a look with a thermal imaging camera (maybe borrow one somewhere?).