Central solar heating

For block systems, the solar collectors are typically mounted on the building roof tops.

Ideally, the aim for applying seasonal storage is to store solar energy collected in the summer time to the winter month.

It may be relevant mentioning, that the island of Ærø in Denmark has three of the major CSHP, Marstal, Ærøskøping and Rise.

Denmark did enter this research area parallel to the Swedish activities with a plant in Vester Nebel in 1987, one plant in Saltum in 1988 and one in Ry in 1989, taking over the know-how for prefabricated solar collectors of large size by the Swedish company Teknoterm by the dominating company ARCON, Denmark.

Due to cheap land prices, in the Nordic countries new collector arrays are ground-mounted (concrete foundations or pile-driven steel) in suitable areas (low-yield agricultural, industry etc.).

Countries with high ground prices tend to place solar collectors on building roofs, following the 'block plant' variant of CSHPs.