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Samsung Gen 6

Deiniolen, Gwynedd · Detached · 133 m² · Pre-1900 · 5 kW · underfloor · installed by OpenEnergyMonitor (designed)

Last 7 days

169 hourly rows · MID-class heat meter present: yes
5.09efficiency (COP) over 169 hours, from the heat meter
better than 99% of the metered fleet in January 2026
Electricity used
92 kWh
Heat delivered
467 kWh (heat meter)
Estimate without heat meter
flow sensor 5.13 · temperature model 4.64
Mean outdoor temperature
8.6 °C · 93 space-heating hours
Flow temperature at 0 °C outside
31.4 °C (curve slope -0.16 per K)
Flow − return while heating
4.6 K
House needs at −3 °C
4.7 kW (unit rated 5 kW) · fit r² 0.01
Hot water
26% of electricity, COP 4.30
infoNo configuration faults detected in this window
Keep the current settings. We will alert you if efficiency drifts.

Day by day

electricity per daydaily COP3.0 floor
electricity, kWh per day08162026-10-31: 6.5 kWh, outside 9.1 °C2026-11-01: 7.8 kWh, outside 9.4 °C2026-11-02: 15.5 kWh, outside 7.8 °C2026-11-03: 13.5 kWh, outside 9 °C2026-11-04: 15.5 kWh, outside 8.8 °C2026-11-05: 12 kWh, outside 8.5 °C2026-11-06: 13 kWh, outside 8.4 °C2026-11-07: 7.7 kWh, outside 6.5 °Cdaily COP (heat ÷ electricity)1352026-10-31: COP 5.612026-11-01: COP 5.092026-11-02: COP 5.162026-11-03: COP 5.122026-11-04: COP 5.082026-11-05: COP 4.772026-11-06: COP 5.152026-11-07: COP 4.9110-3111-0111-0211-0311-0411-0511-0611-07
Daily COP needs a heat meter; days without one show electricity only.

The installed heating curve

one heating hourfitted curve50 °C
203040506013579111315outdoor temperature, °Cflow temperature, °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.