ᐅ Air-to-water heat pump supply temperatures

I am currently experimenting with my heating curve and would be interested to know what supply temperatures you are running with your air-to-water heat pump combined with underfloor heating?

Maximum 31.5°C (89°F). Indoor temperature remains relatively steady around 23.5°C (74°F).

Current outdoor temperature is 5.1 degrees Celsius (41.2°F), return temperature 24.2 degrees Celsius (75.6°F), supply temperature 24.4 degrees Celsius (75.9°F). Room temperature is between 22 and 24 degrees Celsius (71.6 and 75.2°F).

Yes, OK, my calculation also assumes a maximum supply temperature of 30°C (86°F)...

What I'm interested in is the relationship between the supply temperature, room temperature, and outdoor temperature.

If a temperature difference is needed to heat the room to, for example, 20-21°C (68-70°F), then the supply temperature, regardless of the outdoor temperature, must be at least X degrees higher.

That’s why I’m wondering if, for instance, at an outdoor temperature of 5-10°C (41-50°F), the supply temperature must already be at least 24°C (75°F) for the room to reach 20-21°C (68-70°F)?

Then only 6°C (11°F) remain until the maximum supply temperature of 30°C (86°F) is reached, even though the difference between the standard outdoor temperature and the example 5-10°C (41-50°F) is 15°C (59°F) (difference between 10°C (50°F) and -15°C (5°F)).

I hope I was able to express myself clearly and didn’t make it too complicated?

That depends solely on your house and its insulation values; no general figures can be given.

blackm88 schrieb:

Outside temperature currently 5.1°C (41°F), return flow 24.2°C (75.6°F), supply flow 24.4°C (75.9°F). Room temperature 22–24°C (72–75°F)

Because it doesn’t hold steady during a cycle.