06 June 2020
It’s been about week since we replaced our gas-fired central heating system with an electrical heat-pump based system.
The new system operates a little differently to our previous one. The main difference is how they heat:
Gas - it’s either on or off. The radiators are either heating up, or cooling down.
Heat pump - like a regular heat pump, the system can run at a variety of power levels.
This means that the radiators run at lower, but consistent temperatures as the house reaches it’s target temperature.
For the last 6 days (June):
Consumed energy: 88 kWh
Delivered energy: 312 kWh
Cost to purchase energy: 88 kWh * 17.4c = $15.31
Daily energy cost: $2.93 (fixed daily charge covered by existing energy requirements)
Carbon emitted over 6 days: 10.8 kg (source: Ecotricity)
Note: need to reduce these figures, as daytime energy usually covered by solar PV panels. Will need another month or so, for comparison with new/old metered electicity usage.
Energy required: 312 kWh
Cost to purchase energy: 312 kWh * 4.83c = $15.07
Daily energy cost: $4.11 (include $1.60 daily charge as only use for heating)
Carbon emitted over 6 days: 61 kg - (source: Ecotricity)