721 hourly rows · MID-class heat meter present: no
3.46efficiency (COP) over 721 hours, from the heat meter better than 36% of the metered fleet in January 2026
Electricity used
414 kWh
Heat delivered
1430 kWh (heat meter)
Estimate without heat meter
flow sensor 3.56 · temperature model 3.33
Mean outdoor temperature
5.6 °C · 394 space-heating hours · cooling 14 kWh removed (3 kWh electricity), kept out of the COP
Flow temperature at 0 °C outside
38.2 °C (curve slope -0.13 per K)
Flow − return while heating
5.5 K
House needs at −3 °C
3.8 kW (unit rated 4 kW) · fit r² 0.04
Hot water
12% of electricity, COP 2.86
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 £7 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.