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Global Energy R290

Lancashire · Detached · 190 m² · Pre-1900 · 12 kW · radiators · installed by Adam Rowlandson

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

3.92efficiency (COP) over 169 hours, from the heat meter
better than 69% of the metered fleet in January 2026

Electricity used: 213 kWh
Heat delivered: 836 kWh (heat meter)
Estimate without heat meter: flow sensor 4.06 · temperature model 3.73
Mean outdoor temperature: 8.3 °C · 140 space-heating hours
Flow temperature at 0 °C outside: 40.9 °C (curve slope -0.48 per K)
Flow − return while heating: 3.1 K
House needs at −3 °C: 6.3 kW (unit rated 12 kW) · fit r² 0.25
Hot water: 23% of electricity, COP 3.76

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Keep the current settings. We will alert you if efficiency drifts.

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.