Price: include’s, tax, transportation and installation, Excluding: all kinds of Plumbing, electrical or masonary works. Charges extra: on Electric coil & on Credit Card Payments. 20 Years Guarantee for Tank Option for Steel and Full steel, Glass Lined Inner tank, Suitable for Hard Water up-to 1300 TDS, Maintenance free, High Efficiency, Air vent system to provide max water pressure, Budget friendly solar water heater. Caution: Do not use Pressurized water or Pressure/ Booster Pump for this model.