Specifications: For family of 6-7 person Warranty : 20 Years (on-Tank) Tank Volume- 270 LPD Inner Tank material- 1.4mm CRCA with Porcelain Enamel Coating (Glass Coating) Inner Tank Thickness : 1.4 mm Outer Tank Material - 0.45mm Powder Coated/0.4mm Stainless Steel No of tubes -26 Can handle upto 2000 ppm of water hardness Must Before Buying: Space available on terrace should be minimum : 8 feet x 8 feet Overhead Tank/Synatx should be placed minimum 6 feet higher from the terrace If you have booster pump on terrace , this product is not Customer Scope: Plumbing and Electrical wiring