Just out of curiosity, to better understand the slope of the heating curve, what flow temperatures do you typically run at 0°C (32°F) outdoor temperature, given a certain indoor temperature and insulation level, when using a combination of underfloor heating and a heat pump?
Background of the question:
My logic tells me that if I want, for example, 22°C (72°F) room temperature, the flow temperature must be at least 22°C (72°F) or higher, since I learned that there needs to be a temperature difference for heat transfer to occur.
So if my heating system turns on at 12°C (54°F) outdoor temperature, my flow temperature should logically start somewhere around 22°C–25°C (72°F–77°F). Accordingly, at only 5°C (41°F) outside, it should be around 27°C (81°F), and at 0°C (32°F) close to 30°C (86°F).
The system design usually takes the location and outdoor temperature down to about –12°C (10°F). If at 0°C (32°F) flow temperature is already 30°C (86°F) according to my logic, then at –12°C (10°F) the flow temperature should be about 40°C (104°F). But most underfloor heating designs for heat pumps are based on a maximum flow temperature of 35°C (95°F).
Of course, the insulation of the house and the indoor temperatures still play a role. Or is the increase in flow temperature actually so gradual that it only rises by about 0.5–1°C (1–2°F) for outdoor temperature drops in 0–5°C (0–9°F) increments?
Background of the question:
My logic tells me that if I want, for example, 22°C (72°F) room temperature, the flow temperature must be at least 22°C (72°F) or higher, since I learned that there needs to be a temperature difference for heat transfer to occur.
So if my heating system turns on at 12°C (54°F) outdoor temperature, my flow temperature should logically start somewhere around 22°C–25°C (72°F–77°F). Accordingly, at only 5°C (41°F) outside, it should be around 27°C (81°F), and at 0°C (32°F) close to 30°C (86°F).
The system design usually takes the location and outdoor temperature down to about –12°C (10°F). If at 0°C (32°F) flow temperature is already 30°C (86°F) according to my logic, then at –12°C (10°F) the flow temperature should be about 40°C (104°F). But most underfloor heating designs for heat pumps are based on a maximum flow temperature of 35°C (95°F).
Of course, the insulation of the house and the indoor temperatures still play a role. Or is the increase in flow temperature actually so gradual that it only rises by about 0.5–1°C (1–2°F) for outdoor temperature drops in 0–5°C (0–9°F) increments?
KingJulien27 Oct 2021 22:13Maybe @Malz1902 meant the footing at 1°C (34°F)?
Perhaps an electric quick heater could be an option for a short burst of warmth? Programmable models are available.
I'm also noticing that I can't really heat the bathroom well without significantly reducing heating elsewhere. I don't really want to do that, as I don't need the bathroom to be warm 24/7. Actually, I don't personally require a particularly warm bathroom, but I don't live alone 😉
Perhaps an electric quick heater could be an option for a short burst of warmth? Programmable models are available.
I'm also noticing that I can't really heat the bathroom well without significantly reducing heating elsewhere. I don't really want to do that, as I don't need the bathroom to be warm 24/7. Actually, I don't personally require a particularly warm bathroom, but I don't live alone 😉
Malz1902 schrieb:
I envy you; I have to reduce the flow to all the circuits except the bathroom and guest WC, otherwise these two rooms don’t really get warm while all the other rooms become too hot. If I lower the heating curve, those two rooms don’t get warm enough even with full flow. KingJulien schrieb:
Maybe an electric booster heater for a quick heat boost is an option? Programmable ones are available. That would also be my suggestion. There are nice electric heaters available. I wonder: why are you having issues specifically in the bathrooms?!
KingJulien28 Oct 2021 00:56ypg schrieb:
I wonder: why do you have problems in the bathrooms?!The heating circuits are simply undersized. Small room, usually on the north side, often with shower and bathtub excluded. The general contractor typically installs electric heating by default. We just removed it once and tried, but will probably add one later.
KingJulien28 Oct 2021 00:57ypg schrieb:
There are nice electric heatersWhere exactly? I haven’t found any on my first search yet 😀I
Isokrates28 Oct 2021 05:25KingJulien schrieb:
Where is that? We installed a Kermi Casteo in black in the bathroom. In my opinion, it looks decent and fits well with our overall design.
KingJulien28 Oct 2021 05:39@Isokrates
Looks good. Unfortunately, we only have space for the "wall dryer" type. At least where there is a power outlet.
And in that case, the selection is quite limited, especially at the large online bathroom store.
Looks good. Unfortunately, we only have space for the "wall dryer" type. At least where there is a power outlet.
And in that case, the selection is quite limited, especially at the large online bathroom store.