balcony collector module
Tokyo Gas launches balcony-integrated Collector
Submitted by Baerbel Epp on Wed, 06/24/2009 - 21:00.
Japan´s large natural gas company, Tokyo Gas, started producing a collector panel that can be integrated into balconies. The low-cost system is a combination of solar panels and a gas water heater. Photo: Tokyo Gas
Fair Season in China: Three Major Trends
Submitted by Baerbel Epp on Mon, 03/09/2009 - 13:53.




Different vacuum tube technologies in comparison: The full-glass vacuum tube can easily be recognised by the extended and closed top.













