715 hourly rows · MID-class heat meter present: yes
3.48efficiency (COP) over 715 hours, from the heat meter better than 37% of the metered fleet in January 2026
Electricity used
917 kWh
Heat delivered
3191 kWh (heat meter)
Estimate without heat meter
flow sensor 3.73 · temperature model 3.04
Mean outdoor temperature
4.8 °C · 715 space-heating hours
Flow temperature at 0 °C outside
43.7 °C (curve slope -0.77 per K)
Flow − return while heating
5.1 K
House needs at −3 °C
6.1 kW (unit rated 10 kW) · fit r² 0.29
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”
valueReaching the fleet’s January median (3.69) would have saved about £13 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.