How to Estimate Electricity Consumption
Heat pump electricity consumption = Annual heat demand ÷ CoP. For a typical 3-bedroom home with 12,000 kWh heat demand and CoP of 3.0: 4,000 kWh electricity per year. At 24p/kWh = £960/year.
Factors Affecting Consumption
- Home insulation quality (better insulation = lower heat demand)
- Flow temperature setting (lower = more efficient)
- Electricity tariff (smart tariffs can save 30–40%)
- Occupancy patterns
- Outdoor temperature (colder winters = more consumption)
How to Reduce Bills
- Switch to a heat pump tariff (Octopus Intelligent, Cosy, Economy 7)
- Lower the flow temperature (5°C reduction = ~10% efficiency gain)
- Enable weather compensation
- Improve home insulation
- Annual servicing to maintain CoP
Sources: current price cap.
