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Home / system #685

Octopus Cosy

Pudsey, Leeds · Detached · 215 m² · 2012 or newer · 9 kW · radiators · installed by Octopus Energy Services

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
3.46efficiency (COP) over 721 hours, from the heat meter
better than 36% of the metered fleet in January 2026
Electricity used
657 kWh
Heat delivered
2275 kWh (heat meter)
Estimate without heat meter
flow sensor 2.35 · temperature model 3.63
Mean outdoor temperature
5.5 °C · 393 space-heating hours
Flow temperature at 0 °C outside
35.4 °C (curve slope -0.27 per K)
Flow − return while heating
4.0 K
House needs at −3 °C
5.0 kW (unit rated 9 kW) · fit r² 0.01
Hot water
26% of electricity, COP 3.19
infoNo configuration faults detected in this window
Keep the current settings. We will alert you if efficiency drifts.
valueReaching the fleet’s January median (3.69) would have saved about £10 in this window at 0.25 GBP/kWh. An estimate, not a promise.

Day by day

electricity per daydaily COP3.0 floor
electricity, kWh per day018352026-01-05: 32.8 kWh, outside – °C2026-01-06: 35.2 kWh, outside – °C2026-01-07: 28.4 kWh, outside – °C2026-01-08: 35.2 kWh, outside – °C2026-01-09: 27.9 kWh, outside – °C2026-01-10: 22.2 kWh, outside – °C2026-01-11: 27 kWh, outside 10 °C2026-01-12: 16.9 kWh, outside 9.1 °C2026-01-13: 15.1 kWh, outside 6.6 °C2026-01-14: 26.1 kWh, outside 3 °C2026-01-15: 21.6 kWh, outside 5.2 °C2026-01-16: 13.6 kWh, outside 4.4 °C2026-01-17: 19.2 kWh, outside 6.1 °C2026-01-18: 16.1 kWh, outside 5.7 °C2026-01-19: 13.8 kWh, outside 6.7 °C2026-01-20: 14.7 kWh, outside 7.8 °C2026-01-21: 18.7 kWh, outside 6.7 °C2026-01-22: 17.4 kWh, outside 6.2 °C2026-01-23: 12.7 kWh, outside 6.5 °C2026-01-24: 17.1 kWh, outside 6 °C2026-01-25: 20 kWh, outside 4.9 °C2026-01-26: 27.2 kWh, outside 3.4 °C2026-01-27: 23.6 kWh, outside 4.7 °C2026-01-28: 20.8 kWh, outside 3.3 °C2026-01-29: 25.6 kWh, outside 3.8 °C2026-01-30: 28.7 kWh, outside 4.2 °C2026-01-31: 17.4 kWh, outside 6.5 °C2026-02-01: 15.7 kWh, outside 6.4 °C2026-02-02: 19.2 kWh, outside 5.6 °C2026-02-03: 26.6 kWh, outside 3 °C2026-02-04: 0.6 kWh, outside 2.3 °Cdaily COP (heat ÷ electricity)1352026-01-05: COP 2.732026-01-06: COP 2.942026-01-07: COP 3.12026-01-08: COP 2.912026-01-09: COP 3.332026-01-10: COP 3.092026-01-11: COP 3.572026-01-12: COP 4.362026-01-13: COP 4.182026-01-14: COP 3.472026-01-15: COP 3.532026-01-16: COP 3.362026-01-17: COP 4.192026-01-18: COP 3.752026-01-19: COP 4.022026-01-20: COP 4.442026-01-21: COP 4.132026-01-22: COP 3.882026-01-23: COP 4.442026-01-24: COP 3.612026-01-25: COP 3.432026-01-26: COP 3.352026-01-27: COP 3.612026-01-28: COP 32026-01-29: COP 3.392026-01-30: COP 3.112026-01-31: COP 3.652026-02-01: COP 3.852026-02-02: COP 3.292026-02-03: COP 3.262026-02-04: COP 4.2901-0501-0901-1301-1701-2101-2501-2902-02
Daily COP needs a heat meter; days without one show electricity only.

The installed heating curve

one heating hourfitted curve50 °C
2030405060-11357911outdoor 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.