581 hourly rows · MID-class heat meter present: no
2.73efficiency (COP) over 581 hours, from the heat meter better than 3% of the metered fleet in January 2026
Electricity used
104 kWh
Heat delivered
283 kWh (heat meter)
Estimate without heat meter
flow sensor – · temperature model –
Mean outdoor temperature
– °C · 167 space-heating hours
Flow temperature at 0 °C outside
–
Flow − return while heating
1.8 K
House needs at −3 °C
–
Hot water
no hot-water flag in data
seriousWinter efficiency 2.73 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.
warningOnly 1.8 K between flow and return
Circulation pump may be set too high or emitters are undersized for the low flow temperature. Ask the installer to check pump speed.
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.