A solar thermal heating system by Swedish company SolTech looks a lot like the curved clay or concrete tiles that might normally adorn a roof. The tiles are made of ordinary transparent glass, allowing the sun to shine through onto the absorbing surface underneath
By Peter Fabris | September 28, 2012
A solar thermal heating system by Swedish company SolTech looks a lot like the curved clay or concrete tiles that might normally adorn a roof. The tiles are made of ordinary transparent glass, allowing the sun to shine through onto the absorbing surface underneath
