Specifications: For family of 10-12 person Warranty : 20 Years (on-Tank) Tank Volume- 500 LPD Inner Tank material- 1.4mm CRCA with Porcelain Enamel Coating Inner Tank Thickness : 1.4 mm Outer Tank Material - 0.45mm Powder Coated/0.4mm Stainless Steel No of tubes -38 Can handle upto 2000 ppm of water hardness Must Before Buying: Space available on terrace should be minimum : 7 feet x 6 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