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Home / system #7

Mitsubishi Ecodan

Weymouth · Detached · 244 m² · 1983 to 2011 · 14 kW · radiators · installed by Total Renewable Solutions

Last 30 daysLast 7 days5 Jan – 4 Feb 2026 (winter reference)1–31 Dec 2025

5 Jan – 4 Feb 2026 (winter reference)

721 hourly rows · MID-class heat meter present: yes
3.92efficiency (COP) over 721 hours, from the heat meter
better than 69% of the metered fleet in January 2026
Electricity used
802 kWh
Heat delivered
3143 kWh (heat meter)
Estimate without heat meter
flow sensor 3.94 · temperature model 3.69
Mean outdoor temperature
8.6 °C · 542 space-heating hours · cooling 0 kWh removed (0 kWh electricity), kept out of the COP
Flow temperature at 0 °C outside
39.0 °C (curve slope -0.32 per K)
Flow − return while heating
2.5 K
House needs at −3 °C
7.0 kW (unit rated 14 kW) · fit r² 0.13
Hot water
23% of electricity, COP 3.20
warningOnly 2.5 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.

Day by day

electricity per daydaily COP3.0 floor
electricity, kWh per day022442026-01-05: 44.3 kWh, outside 2.4 °C2026-01-06: 41.6 kWh, outside 3.8 °C2026-01-07: 29.5 kWh, outside 6.5 °C2026-01-08: 27.8 kWh, outside 8.5 °C2026-01-09: 38.9 kWh, outside 5.4 °C2026-01-10: 36.1 kWh, outside 5.9 °C2026-01-11: 26 kWh, outside 8.5 °C2026-01-12: 18.3 kWh, outside 11.3 °C2026-01-13: 17.4 kWh, outside 11.1 °C2026-01-14: 29.6 kWh, outside 7.6 °C2026-01-15: 23.6 kWh, outside 10.7 °C2026-01-16: 20.6 kWh, outside 8.9 °C2026-01-17: 23 kWh, outside 9.5 °C2026-01-18: 21.9 kWh, outside 10.8 °C2026-01-19: 21 kWh, outside 10.6 °C2026-01-20: 23.3 kWh, outside 10.1 °C2026-01-21: 21.9 kWh, outside 9.4 °C2026-01-22: 21 kWh, outside 11.2 °C2026-01-23: 25.2 kWh, outside 8.3 °C2026-01-24: 30.1 kWh, outside 9.3 °C2026-01-25: 28.3 kWh, outside 8.2 °C2026-01-26: 28.8 kWh, outside 7.5 °C2026-01-27: 26.7 kWh, outside 9.9 °C2026-01-28: 22.6 kWh, outside 8.4 °C2026-01-29: 27.4 kWh, outside 8.9 °C2026-01-30: 25 kWh, outside 9.1 °C2026-01-31: 22.5 kWh, outside 9.2 °C2026-02-01: 24 kWh, outside 9.1 °C2026-02-02: 26.6 kWh, outside 9.6 °C2026-02-03: 28.8 kWh, outside 8.2 °C2026-02-04: 0 kWh, outside 9.8 °Cdaily COP (heat ÷ electricity)1352026-01-05: COP 2.762026-01-06: COP 3.132026-01-07: COP 3.732026-01-08: COP 4.252026-01-09: COP 3.672026-01-10: COP 3.172026-01-11: COP 4.432026-01-12: COP 4.692026-01-13: COP 4.412026-01-14: COP 3.782026-01-15: COP 4.262026-01-16: COP 3.962026-01-17: COP 42026-01-18: COP 4.232026-01-19: COP 4.322026-01-20: COP 4.332026-01-21: COP 4.722026-01-22: COP 4.412026-01-23: COP 3.862026-01-24: COP 4.112026-01-25: COP 3.82026-01-26: COP 3.912026-01-27: COP 4.032026-01-28: COP 3.752026-01-29: COP 4.072026-01-30: COP 4.292026-01-31: COP 4.282026-02-01: COP 3.952026-02-02: COP 3.872026-02-03: COP 3.9601-0501-0901-1301-1701-2101-2501-2902-02
Daily COP needs a heat meter; days without one show electricity only.

The installed heating curve

one heating hourfitted curve50 °C
20304050600246810121416outdoor 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.