No, Havenwise works with any electricity tariff, whether you’re on a flat tariff or a “time-of-use” tariff.
Time-of-use tariffs (e.g. Octopus Agile)
These tariffs offer cheaper electricity at certain times of the day. Havenwise can automatically shift energy consumption into these cheaper periods where possible, making your heating more cost-effective.Flat tariffs
Even without cheaper periods, Havenwise improves the efficiency of your heat pump. It learns how your home heats, cools, and retains warmth, then continuously optimises the flow temperature. This reduces electricity consumption and maximises efficiency (also known as your heat pump’s Coefficient of Performance or “COP”).
This approach is sometimes called “low and slow” Your home stays warm while your heat pump runs in its most efficient state.
💡 Rule of thumb: For every 1°C decrease in flow temperature, efficiency improves by 2–3%. Over time, these efficiency gains translate into noticeable cost savings