Anu solar power pvt. Ltd. Offers anu premium solar geysers. This is a high efficiency system with tank-in-tank facility for instant back-up heating on cloudy days. Puf insulation, density : 38-42 kg/m³ and its vertical design for storage tank for enhanced thermal stratification. No. Of copper fins - 10, 11% higher absorption of solar radiation. Copper purity - 99.99%. Storage tank material - stainless steel with 1-year warrantee against manufacturing defect.