A soldering tool
Accumulator arrangement for the sunlight energy
Active thermal storage using the ground underlying a solar pond
Apparatus and method for solar heating of water
Apparatus for and method of heating a swimming pool
Apparatus for collecting solar energy
Apparatus for heating a swimming pool
Apparatus for storage and recovery of low temperature thermal en
Aqueous gel for heat storage pond and method for making the gel
Bidirectional thermal syphon valve, installation for the product
Bottom construction of ponds particularly solar ponds
Carbonaceous selective absorber for solar thermal energy collect
Check valve and spring to prevent forward and reverse thermosiph
Chemical heat pump
Climate-controlled building
Closed loop solar collector system with dual chamber fluid suppl
Closed loop solar collector system with dual reservoirs and flui
Closed loop solar collector system with dual reservoirs and flui
Collector means for solar energy collecting system
Collector means for solar energy collecting system