Evacuated heat pipe solar collectors (heat exchangers); Solar collectors (lighting); Solar energy collectors for heating; Solar energy powered heating apparatus; Solar energy powered heating installations; Solar heating apparatus; Solar heating installations; Solar heating panels; Solar panels for use in heating; Solar powered ventilation apparatus; Solar thermal collectors (heating); Solar thermal collectors for heating; Supports adapted for use with solar heating tubes; Thermal storage apparatus (solar energy) for heating; Thermal storage instruments (solar energy) for heating