Cylinder Sizing and Coil Area for Heat Pumps
Heat pumps deliver heat at a lower temperature over a longer period compared to a conventional boiler. This means the hot water cylinder itself, and especially its internal coil, needs to be significantly larger to transfer enough heat efficiently. A standard boiler coil is often insufficient, leading to poor hot water performance. We calculate the required cylinder volume based on your household's daily hot water demand and the heat pump's output, ensuring you have enough stored hot water without excessive reheat times. The coil area directly impacts heat transfer efficiency.
- Lower flow temperature demands larger coil surface area
- Volume calculation based on household occupancy and usage
- Prevents 'running out' of hot water
- Ensures efficient heat transfer from heat pump

