Home / system #917
Test Unit R290
Basingstoke · Semi-detached · 120 m² · 1940 to 1982 · 9 kW · underfloor · installed by Next Climate Consultant
1–31 Dec 2025
6 hourly rows · MID-class heat meter present: no
2.25efficiency (COP) over 6 hours, from the heat meter
better than 1% of the metered fleet in January 2026
better than 1% of the metered fleet in January 2026
- Electricity used
- 9 kWh
- Heat delivered
- 21 kWh (heat meter)
- Estimate without heat meter
- flow sensor 2.28 · temperature model 2.98
- Mean outdoor temperature
- -1.3 °C · 6 space-heating hours
- Flow temperature at 0 °C outside
- 32.5 °C (curve slope -1.24 per K)
- Flow − return while heating
- 2.0 K
- House needs at −3 °C
- 4.5 kW (unit rated 9 kW) · fit r² 0.06
- Hot water
- no hot-water flag in data
infoOnly 6 space-heating hours in this window
Space-heating findings need at least 60 hours with the compressor running below 15 °C outside. Choose a winter window or come back during the heating season.
valueReaching the fleet’s January median (3.69) would have saved about £1 in this window at 0.25 GBP/kWh. An estimate, not a promise.
Day by day
electricity per daydaily COP3.0 floor
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.