Home / system #723

Samsung Gen 7

Wymondham, Norfolk · Detached · 375 m² · Pre-1900 · 16 kW · radiators · installed by Simon Bennett (Self Install)

Last 30 days Last 7 days 5 Jan – 4 Feb 2026 (winter reference)1–31 Dec 2025

Last 7 days

169 hourly rows · MID-class heat meter present: yes

5.06efficiency (COP) over 169 hours, from the heat meter
better than 99% of the metered fleet in January 2026

Electricity used: 90 kWh
Heat delivered: 458 kWh (heat meter)
Estimate without heat meter: flow sensor 5.20 · temperature model 5.10
Mean outdoor temperature: 9.4 °C · 65 space-heating hours · cooling 1 kWh removed (2 kWh electricity), kept out of the COP
Flow temperature at 0 °C outside: 42.4 °C (curve slope -1.53 per K)
Flow − return while heating: 5.0 K
House needs at −3 °C: 18.0 kW (unit rated 16 kW) · fit r² 0.51
Hot water: 12% of electricity, COP 3.70

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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.