Thermal store:-

            Based on http://www.builditsolar.com/Projects/SpaceHeating/SolarShed/Tank/Tank.htm

• Target thermal storage capacity 60kWh
• Approx thermal store required 425Gallons (1930 litres)
• Thermal store outside size 2.0mt high x 1.2mt x 1.2mt (7ft x 4ft x 4ft)
• Max capacity of 500 gallons (2267 litres) with water level @ 1.576mt depth
• Max thermal capacity of 73kWh with water level @ 1.576mt depth
• Insulation 150mm (6”) thick Foil backed pink polyisocyanurate insulation (approx R35)
• Thermal store to be raised to a minimum of 60º C at least once per month to reduce the risk of legionella.
• Three temp sensors (bottom, middle and top)
• 1 output heat exchanger to supply the house.
• 4 input heat exchangers one for each of the following,
  • Small solar array.
  • Large solar array.
  • Oil boiler.
  • Wind turbine tank.