Solar preheat storage tank
Provide a cylindrical thermal energy storage solar preheat tank with a storage capacity of at least 1.5 gallons per square foot of collector area. Insulate each tank with fiberglass or foam with a loss coefficient of not more than 0.5 W/m2C. Protect the insulation by a PVC or steel jacket. Provide a tank rated at 100 lb/in2 at 190 degrees Fahrenheit. Provide the interior of each tank with glass lining for potable service.