Category NameHeat Pump CylindersExpansion Vessel Size50Includes Expansion VesselYesERP (Energy Efficiency)NNumber of Immersion Heaters1 x 3 kWYears GuaranteedLifetime (Inner Container); 2 Years (Components/Parts)Width510mmUsageUnvented Hot Water Storage Cylinder For Air Or Ground Source Heat Pumps (Also Suitable For Boilers And Solar)TypeCylinders - Indirect UnventedSolar CompatibleNoPower kW3 kWMaximum Operating Pressure3MaterialStainless SteelHeight1640mmFuel TypeExternal Source (Heat Pump)Flow RateHigh Flow RatesDepth510mmConnection Size22 mm Compression FittingsColourStainless Steel Cold or Hot WaterMains Pressure Hot WaterCoil Type316L Stainless Steel Internal CoilCapacity170 LSupplier Part NumberTSMI170/50/HP/PPRange DescriptionTempestManufacturer Model NoTSMI170/50/HP/PPBrand NameTelford