Correct operation of a heat pump can increase its efficiency by 15–25% compared to typical use.
Home insulation is the most important factor. A heat pump is most efficient in a well-insulated building. Every degree reduction in water supply temperature increases COP by approximately 2–3%.
Correct capacity sizing — a pump matched precisely to the building's heat loss operates in the optimal modulation range. An oversized pump cycles, an undersized one cannot cope during peak frosts.
Smart control — using a WiFi thermostat and night-rate tariffs allows heat to be stored overnight (cheap electricity) and maintained through the day.
Regular maintenance — cleaning the heat exchanger 1–2 times per year keeps COP at the design level.
