745 hourly rows · MID-class heat meter present: yes
4.12efficiency (COP) over 745 hours, from the heat meter better than 84% of the metered fleet in January 2026
Electricity used
638 kWh
Heat delivered
2628 kWh (heat meter)
Estimate without heat meter
flow sensor 4.37 · temperature model 3.47
Mean outdoor temperature
6.6 °C · 744 space-heating hours
Flow temperature at 0 °C outside
42.3 °C (curve slope -0.84 per K)
Flow − return while heating
4.6 K
House needs at −3 °C
5.5 kW (unit rated 10 kW) · fit r² 0.41
Hot water
no hot-water flag in data
infoNo configuration faults detected in this window
Keep the current settings. We will alert you if efficiency drifts.
noteOwner’s note on the source site: “Unchecked primary circ pump flow rate change without visible pump power change”
Day by day
electricity per daydaily COP3.0 floor
Daily COP needs a heat meter; days without one show electricity only.
The installed heating curve
one heating hourfitted curve50 °C
Each point is one hour of space heating. Lower and flatter is cheaper; well-set radiator systems sit around 35–42 °C at 0 °C outside.
Public system published by its owner on HeatpumpMonitor.org. Cycling (starts per hour) comes from the site’s 365-day statistic. Findings use installer rules of thumb; see methodology.