Height 1840 Internal Diameter 600 External Diameter 700 Insulation 50 Drain 3/4 female 280 Cold Feed 1 female 550 Solar Coil Outlet 3/4female 300 Solar Coil Feed 3/4female 570 Solar Coil: Stainless Steel (diameter) 22 Boiler Coil Outlet 3/4female 830 Boiler Coil Feed 3/4female 1045 Boiler Coil: Stainless Steel (diameter) 22 1Gravity Coil Outlet none 1Gravity Coil Feed none Gravity Coil: Stainless Steel (diameter) none 3Kw Immersion 1 770 3Kw Immersion 2 1280 Temp Sensor Pocket 11/2 female 680 Temp Sensor Pocket 21/2 female 1515 Double Stat Temp Sen. Pocket 770 Secondary Return3/4female 1415 T & P Valve 1/2 female 1515 Hot Draw Off 1 female 1840 Standard Heat Loss per 24 Hours (kWhr) 3.49 Dedicated Solar Volume () 260 Dedicated Solar Volume (%) 52 EN12897 Solar Heat Exchanger (kW) 41.3 Solar Coil (m) 1.5 EN12897 Boiler Coil Exchanger (kW) 33.1 Boiler Coil Surface Area (m) 1.2 EN12977 ERP Storage Energy Efficiency Class A