Lowers running costs by harnessing the suns energy to provide hot water. This is achieved in conjunction with a separately available solar thermal package. Duplex Stainless Steel Tank 30 Year Manufacturers Guarantee (Registration Required, T&Cs Apply) Low Heat Loss & Fast Recovery 60mm Insulation for High Energy Efficiency Suitable for High Pressure Systems Only Overheat Cut-Out Protection Duplex Stainless Steel Tank 30 Year Manufacturers Guarantee (Registration Required, T&Cs Apply) Low Heat Loss & Fast Recovery 60mm Insulation for High Energy Efficiency Suitable for High Pressure Systems Only Overheat Cut-Out Protection