721 hourly rows · MID-class heat meter present: no
3.44efficiency (COP) over 721 hours, from the heat meter better than 36% of the metered fleet in January 2026
Electricity used
580 kWh
Heat delivered
1999 kWh (heat meter)
Estimate without heat meter
flow sensor 3.58 · temperature model 3.48
Mean outdoor temperature
6.5 °C · 637 space-heating hours · cooling 0 kWh removed (1 kWh electricity), kept out of the COP
Flow temperature at 0 °C outside
39.2 °C (curve slope -0.54 per K)
Flow − return while heating
3.6 K
House needs at −3 °C
4.8 kW (unit rated 7 kW) · fit r² 0.51
Hot water
10% of electricity, COP 2.73
infoNo configuration faults detected in this window
Keep the current settings. We will alert you if efficiency drifts.
valueReaching the fleet’s January median (3.69) would have saved about £10 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.