The Energystore HP Combi 300 is a fast-recovery, high-performance heat pump hot water cylinder for large households with demanding hot water usage, this is a cylinder that will get you through those times when you would otherwise have run out of hot water with a standard cylinder.
The heat pump coils are done as pairs of high surface area DN20 coils, 3m2 in total, with a single pair of convenient 1" connections. There is a stratification plate to reduce mixing in the cylinder, and there are pairs of coils above and blow this plate, with the plate placed as high in the cylinder as the upper coil allows. When hot water usage is particularly demanding the upper coil can be utilised in combination with a thermostatic mixer valve so that the heat pump will supply heat to just the small upper portion of the cylinder at a high temperature. When combined with a higher output heat pump this provides something approaching a continuous hot water supply - for example 14kW of heat output will likely provide at least 7l/min as a continuous supply.
The insulation is 50mm and solid, and at the base each has a cold water inlet diffuser to reduce internal mixing. Each Energystore HP heat pump cylinder comes with a standard connection kit including the expansion vessel, 3kW immersion, trv/prv, and tundish.