745 hourly rows · MID-class heat meter present: no
2.03efficiency (COP) over 745 hours, from the heat meter better than 1% of the metered fleet in January 2026
Electricity used
1910 kWh
Heat delivered
3879 kWh (heat meter)
Estimate without heat meter
flow sensor 2.05 · temperature model 4.06
Mean outdoor temperature
6.7 °C · 745 space-heating hours
Flow temperature at 0 °C outside
39.6 °C (curve slope -0.69 per K)
Flow − return while heating
5.0 K
House needs at −3 °C
8.0 kW (unit rated 12.5 kW) · fit r² 0.04
Hot water
no hot-water flag in data
seriousWinter efficiency 2.03 is below the 3.0 floor used for German subsidies
Ask the installer for a commissioning check; the causes are usually flow temperature, hot water settings, or sizing, all listed below.
valueReaching the fleet’s January median (3.69) would have saved about £215 in this window at 0.25 GBP/kWh. An estimate, not a promise.
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.