Buy / Sell Heat Pump Privately

So I saw a timer control in the menu (but haven't looked at it yet). Maybe with that?

You haven't heard much yet, but if I've learned one thing in 7 years with heat pumps, it's the basic settings of heat pumps. Of course, each has its peculiarities and adjustment options, but a heat pump has to run through its cycle. So operate with a low heating curve, turn off setback, etc. Of course, many factors play a role, but there are fundamental rules.

Please don't take this personally, but both statements only make limited sense. The heating curve is adjusted depending on the heating demand. Sure, simply turning it down would reduce electricity consumption, but what good is that if it then gets cold?! Night setback often makes sense because it allows the use of photovoltaics and the air-to-water heat pump doesn't have to generate high flow temperatures at the coldest temperatures.

But in the morning I want to have a nice warm bath and not just "OK warm". It's all coulda coulda woulda. Now we have sun again. Not all winter long. Run it efficiently without shutting off or increasing, then it's cheap and no one complains.

Of course, I would also like to use my photovoltaic system during the day for that. But in the morning I also want to have a nice warm bath.

It's like electric car drivers who turn off the heater to have more range. I had to do that once to make it home. I never want to do that again. I’m not going to give up the comfort I paid for just to save 50€ on electricity.

Please don’t take this personally, but both statements make only limited sense.

The heating curve is adjusted depending on the heating demand.
Sure, simply turning it down would reduce electricity consumption, but what’s the point if it then gets cold?!

Night setback often makes sense because it allows the use of photovoltaics and the air-water heat pump doesn’t have to produce a high flow temperature at the coldest temperatures.

I don’t feel attacked at all.

Just to understand briefly, you have about 30 kW consumption per day… and the heat pump should be a modulating one, right? So something throttles, the room cools down, and the heat pump has to catch up with a higher heating curve. Unfortunately, the higher heating curve is not linear to consumption but the efficiency gets worse.

So do the thermal balancing while it’s still around 0 degrees outside, find the coldest room, and then overheat the screed during the day.

I want to have a nice warm bath in the morning and not just "OK warm". It's all just ifs and buts. Now we have sun again. Not at all during the whole winter. Run it efficiently without shutting it off or raising it, then it's cheap and no one complains.

I can of course understand that! But they always say that underfloor heating is very sluggish. Have you ever measured how much the temperature in the bathroom would really drop in the morning with a night setback of, for example, 2 degrees? But yes, you also shouldn't over-optimize if quality of life is then lost!

Just to understand quickly, you have something around 30 kW consumption per day.. and the heat pump should be a modulating one, right? So something throttles, the room cools down, and the heat pump has to catch up with a higher heating curve. Unfortunately, the higher heating curve is not linear to consumption but efficiency worsens.

As I said, the heating curve is adjusted depending on the energy demand. So it actually only depends on how well the house is insulated/sealed. Ah, but maybe the confusion arises here because of active ERRs. Of course, all of mine are open. ;-) In our case, the energy demand is simply high because windows are repeatedly open to get the moisture out.

I would like to disagree with that. The indoor-guided heating is more efficient; at least the indoor temperature should be included in determining the necessary supply temperature. This significantly increases efficiency, especially during transitional periods, because in new buildings the heating can simply remain off when it is cold outside but still warm inside, and solar gains may occur again during the day.

The heating also stays off during the day when only using the heating curve. I have been doing this for many years now (with a ground-source heat pump and now with an air-water heat pump). Because the heating system recognizes from the return flow—which stays warm since the house is also heated—that no performance is needed. Currently, between 11 a.m. and 5 p.m. the heating is off—even in the old building ;). In this respect, the result is the same, just achieved by a different method.