Short answer: Heat pump running costs depend on the home, heat loss, system design, electricity tariff, controls and heating habits, so a trustworthy installer should avoid promising a fixed bill figure from a web page.

Running costs depend on the home, heat loss, electricity tariff, design, controls and how the system is used.

SCOP is useful for understanding expected efficiency, but it does not turn into a guaranteed bill figure on its own.

Good design, correct setup and homeowner habits all affect the final result, so cost advice should be based on the property rather than a generic promise.

Ready to check your own home? Start with a design consultation so the next step is based on the property, not a generic online assumption.