Sizing Tool
Tell us the building. We'll tell you the hot water demand, the heat pump capacity and the storage volume — using the same method our engineers use on live projects.
Only the essentials are required. Open the design parameters if you want to change our defaults.
Reading the result
Total daily litres at 60 °C after diversity — the figure everything else is derived from.
Thermal kW the heat pump must deliver across your operating window, at your ΔT.
Recommended hot well capacity, rounded to a practical tank size.
This tool gives a design-stage indication. Final selection accounts for inlet temperature, ambient conditions, simultaneity, pipe runs and standby — our engineers confirm every project before quotation.
Send us the numbers and we'll confirm the selection, propose the model and price it.