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

@Bookstar
You have received offers for help several times, but as long as you don't provide any details, no one can assist you.

The majority of the heat storage takes place in the screed, which you also have in the timber frame house. The walls may have slightly less mass, but I don’t think you will notice a significant difference.

T_im_Norden schrieb:

Most of the heat storage happens in the screed, which you also have in a timber frame house.
The walls might have slightly less mass, but I don’t think you will notice a significant difference.

Screed weighs about 7 tons for 75m² (807 ft²).
Walls in a T9 building, roughly estimated at 11.5m * 10m * 2.75m (37.7 ft * 32.8 ft * 9 ft) (windows not subtracted, interior walls not considered), total about 28 tons.

Additionally, there is the 25cm (10 inch) concrete ceiling above that absorbs and releases heat from the floor below. That adds approximately another 20 tons.
So, in a solid construction, you would have around 55 tons of thermal mass per floor.

No idea what dimensions timber frame uses, but it feels about 2 to 3 times less.

FF2677 schrieb:

I turned off the gas heating completely for three days this week just for fun. Hot water was provided by solar thermal...
During the day, all blinds were open, so we had around 24-25°C (75-77°F) on the ground and upper floors (when we heat, we also set it to 24°C (75°F) :p).
In the evenings, we used the fireplace, which helped maintain 24°C (75°F) until midnight. In the morning, the house temperature was about 22.7°C (73°F).
Since I work from home in the basement, it was about 20°C (68°F) down there after the three days... I didn’t feel like sitting in the cold, so I turned everything back on 😀.
But when the sun is shining, we could definitely stay completely off the heating system, if you’re willing to give up some comfort. Even at 24°C (75°F), the floor still felt unpleasantly cold.

Question to the group: How would a timber frame house behave in such an experiment? It should cool down much more at night, right? Any experiences?

A timber frame house loses much less energy than a solid construction house, so it would cool down much more slowly.

@T_im_Norden I thought I had posted everything. If the heating runs like this, everything is fine. No issues, efficient, and warm as well. What more could you want?

Bookstar schrieb:

A timber frame loses much less energy than a solid wall house, so it would cool down much later.

You can’t really say that in such general terms.
Solid walls have a significantly higher heat storage capacity than timber frame construction.
So, if—as reported—the fireplace heats the house up well again until midnight, I would say that the well-insulated solid wall house is warmer in the morning.

What is needed, I had already written several pages earlier, but as I said, you should start a separate thread for that. And you yourself have already recognized that there is still potential with your heat pump.

“Here’s the key point: Consumption has almost halved! We currently need 10-12 kWh and no longer have to ventilate out as much heat. The system now runs only 4 hours per day instead of 8.”

“As for the amount of heat, my only explanation is that we are overheating and therefore ventilating a lot, which means the system keeps reheating. But I haven’t fully understood this yet either.”