invest-tools.com: GraphsArchived 2016-08-17 at the Wayback Machine, Main page and description: Overview of the DHW system, The water tank (heat reservoir)Archived 2018-01-04 at the Wayback Machine Quote: "...With the tank there came a 10 cm "soft foam" isolation that fulfills the minimum insulation requirements...So after several months, I added another round of 16 cm aluminum coated glass wool, and now the tank stores enough heat for about 7 or 8 days when it is full loaded (temperature range is 95°C down to 40°C)..."
invest-tools.com: GraphsArchived 2016-08-17 at the Wayback Machine, Main page and description: Overview of the DHW system, The water tank (heat reservoir)Archived 2018-01-04 at the Wayback Machine Quote: "...With the tank there came a 10 cm "soft foam" isolation that fulfills the minimum insulation requirements...So after several months, I added another round of 16 cm aluminum coated glass wool, and now the tank stores enough heat for about 7 or 8 days when it is full loaded (temperature range is 95°C down to 40°C)..."