745 hourly rows · MID-class heat meter present: yes
4.32efficiency (COP) over 745 hours, from the heat meter better than 91% of the metered fleet in January 2026
Electricity used
189 kWh
Heat delivered
815 kWh (heat meter)
Estimate without heat meter
flow sensor 4.38 · temperature model 4.35
Mean outdoor temperature
8.4 °C · 252 space-heating hours · cooling 10 kWh removed (2 kWh electricity), kept out of the COP
Flow temperature at 0 °C outside
34.8 °C (curve slope -0.21 per K)
Flow − return while heating
3.4 K
House needs at −3 °C
4.3 kW (unit rated 3.5 kW) · fit r² 0.11
Hot water
no hot-water flag in data
warningUnit is rated 3.5 kW but the house needs about 4.3 kW at −3 °C
Expect backup heater use on the coldest days. Improve insulation or draught-proofing before adding capacity.
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.